DeepSeek V4 (#24162 )

* convert: add dsv4 conversion * add basic setup * add llm_graph_input_dsv4 * add save-load state * add sinkhorn eps - correction by @fairydreaming * add rope fix * cleanup dead code * fix bugs * support pro model: added by @fairydreaming * remove redundant V cache * Chat template * remove debugging leftovers * Add mechanism for inlining templates based on architecture * s/deepseek-v4-flash/deepseek4/g * s/deepseek-v4-flash/deepseek4/g continued * enable graph reuse * enable FA * fix test llama archs * rename * compatibility with antirez ds4 GGUFs * simplified set_gguf_parameters() by calling super class method, replaced moe.score_func with expert_gating_func. * reserve worst-case kv-cache * revert max split inputs * address review comments * add padding to enable FA * pad only the final value of plan.n_kv to 256 * remove built-in cpp chat template * cont: remove cpp built-in template * rm outdated test * replace ggml_view_3d() with ggml_reshape_3d() Co-authored-by: Georgi Gerganov <ggerganov@gmail.com> * only support n_seq=1 for now * remove unused var * cont: remove unused var * use scale bias * use correct ptr for can_reuse * remove gen-chat-inline-templates.py * simplify graph reuse * cont: cleanup * remove unused inputs * enable partial checkpointing * add correct shape for kq_mask + set llama_model_n_swa to 0 for dsv4 * precompute source_idx + add comment about dummy write * support multi-seq * remove restored_trim_pos * use split_equal when possible * fix indent * address review comments * use LLM_KV * fix ci --------- Co-authored-by: Piotr Wilkin <piotr.wilkin@syndatis.com> Co-authored-by: Stanisław Szymczyk <sszymczy@gmail.com> Co-authored-by: Xuan Son Nguyen <son@huggingface.co> Co-authored-by: fairydreaming <166155368+fairydreaming@users.noreply.github.com> Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>
tools/ui: restore Tailwind scanning in ignored worktrees (#24879 )
2026-07-05 03:55:55 +02:00 · 2026-06-29 16:58:51 +08:00 · 2026-06-29 10:55:52 +02:00
27 changed files with 4700 additions and 40 deletions
@@ -51,6 +51,7 @@ TEXT_MODEL_MAP: dict[str, str] = {
    "DeepseekV3ForCausalLM": "deepseek",
    "DeepseekV32ForCausalLM": "deepseek",
    "DFlashDraftModel": "qwen",
+    "DeepseekV4ForCausalLM": "deepseek",
    "DistilBertForMaskedLM": "bert",
    "DistilBertForSequenceClassification": "bert",
    "DistilBertModel": "bert",
@@ -1273,7 +1273,7 @@ class TextModel(ModelBase):
        if (f_norm_eps := self.find_hparam(["layer_norm_eps", "layer_norm_epsilon", "norm_epsilon"], optional=True)) is not None:
            self.gguf_writer.add_layer_norm_eps(f_norm_eps)
            logger.info(f"gguf: layer norm epsilon = {f_norm_eps}")
-        if (n_experts := self.find_hparam(["num_local_experts", "num_experts"], optional=True)) is not None:
+        if (n_experts := self.find_hparam(["num_local_experts", "num_experts", "n_routed_experts"], optional=True)) is not None:
            self.gguf_writer.add_expert_count(n_experts)
            logger.info(f"gguf: expert count = {n_experts}")
        if (n_experts_used := self.find_hparam(["num_experts_per_tok", "num_experts_per_token", "top_k_experts"], optional=True)) is not None:
@@ -1291,6 +1291,8 @@ class TextModel(ModelBase):
                self.gguf_writer.add_expert_gating_func(gguf.ExpertGatingFuncType.SIGMOID)
            elif score_func == "softmax":
                self.gguf_writer.add_expert_gating_func(gguf.ExpertGatingFuncType.SOFTMAX)
+            elif score_func == "sqrtsoftplus":
+                self.gguf_writer.add_expert_gating_func(gguf.ExpertGatingFuncType.SQRTSOFTPLUS)
            else:
                raise ValueError(f"Unsupported expert score gating function value: {score_func}")
            logger.info(f"gguf: expert score gating function = {score_func}")
@@ -2600,6 +2602,17 @@ class LazyTorchTensor(gguf.LazyBase):
        return cls._wrap_fn(func)(*args, **kwargs)


+if hasattr(torch, "float8_e8m0fnu"):
+    _torch_float8_e8m0 = torch.float8_e8m0fnu
+    LazyTorchTensor._dtype_map[_torch_float8_e8m0] = np.uint8
+    LazyTorchTensor._dtype_byteswap_map[_torch_float8_e8m0] = np.uint8
+    LazyTorchTensor._dtype_str_map["F8_E8M0"] = _torch_float8_e8m0
+else:
+    # Older torch builds do not expose F8_E8M0. Keep the raw bytes so callers
+    # that know the format can decode them explicitly.
+    LazyTorchTensor._dtype_str_map["F8_E8M0"] = torch.uint8
+
+
 def get_model_architecture(hparams: dict[str, Any], model_type: ModelType) -> str:
    # TODO @ngxson : this won't work correctly if the model has both audio & vision encoders
    # maybe we should fallback to text model's arch in that case, since not many models have both
@@ -1,15 +1,18 @@
 from __future__ import annotations

+import json
 import re
+from pathlib import Path

 from typing import Any, Callable, Iterable, TYPE_CHECKING

+import numpy as np
 import torch

 if TYPE_CHECKING:
    from torch import Tensor

-from .base import MmprojModel, ModelBase, TextModel, gguf, logger
+from .base import LazyTorchTensor, MmprojModel, ModelBase, TextModel, gguf, logger

 from .qwen import QwenModel

@@ -467,3 +470,307 @@ class DeepseekV32Model(DeepseekV2Model):
        self.gguf_writer.add_indexer_head_count(self.hparams["index_n_heads"])
        self.gguf_writer.add_indexer_key_length(self.hparams["index_head_dim"])
        self.gguf_writer.add_indexer_top_k(self.hparams["index_topk"])
+
+
+@ModelBase.register("DeepseekV4ForCausalLM")
+class DeepseekV4Model(TextModel):
+    model_arch = gguf.MODEL_ARCH.DEEPSEEK4
+    _skipped_mtp_tensors = 0
+
+    def __init__(self, *args, **kwargs):
+        type(self)._skipped_mtp_tensors = 0
+        super().__init__(*args, **kwargs)
+
+        with open(self.dir_model / "config.json", "r", encoding="utf-8") as f:
+            raw_hparams = json.load(f)
+        for key, value in raw_hparams.items():
+            self.hparams.setdefault(key, value)
+
+        self.block_count = self.hparams["num_hidden_layers"]
+        self.tensor_map = gguf.get_tensor_name_map(self.model_arch, self.block_count)
+
+        self._dsv4_fp8_dequantized: set[str] = set()
+        self._dsv4_bf16_tensors: set[str] = set()
+        self._dsv4_f32_tensors: set[str] = set()
+        self._dsv4_mxfp4_generated = False
+        self._collect_source_dtypes()
+
+        if type(self)._skipped_mtp_tensors:
+            logger.info("Skipping %d DeepSeek-V4 MTP tensor(s) for conversion v0", type(self)._skipped_mtp_tensors)
+
+        # add a default chat template; if the model has a built-in template, it will be overridden later
+        template_path = Path(__file__).parent.parent / "models" / "templates" / "deepseek-ai-DeepSeek-V4.jinja"
+        if template_path.is_file():
+            with open(template_path, "r", encoding="utf-8") as f:
+                self.gguf_writer.add_chat_template(f.read())
+
+    @classmethod
+    def filter_tensors(cls, item: tuple[str, Callable[[], Tensor]]) -> tuple[str, Callable[[], Tensor]] | None:
+        name, _ = item
+        if name.startswith("mtp."):
+            cls._skipped_mtp_tensors += 1
+            return None
+        return super().filter_tensors(item)
+
+    @staticmethod
+    def _float8_dtypes() -> tuple[torch.dtype, ...]:
+        return tuple(
+            dtype for dtype in (
+                getattr(torch, "float8_e4m3fn", None),
+                getattr(torch, "float8_e5m2", None),
+            ) if dtype is not None
+        )
+
+    @staticmethod
+    def _e8m0_to_float(scale: Tensor) -> Tensor:
+        torch_float8_e8m0 = getattr(torch, "float8_e8m0fnu", None)
+        if torch_float8_e8m0 is not None and scale.dtype == torch_float8_e8m0:
+            return scale.float()
+
+        bits = scale.view(torch.uint8).float()
+        return torch.exp2(bits - 127.0)
+
+    def _collect_source_dtypes(self) -> None:
+        for name, gen in self.model_tensors.items():
+            dtype = gen().dtype
+            if dtype == torch.bfloat16:
+                self._dsv4_bf16_tensors.add(name)
+            elif dtype == torch.float32:
+                self._dsv4_f32_tensors.add(name)
+
+    def set_gguf_parameters(self):
+        super().set_gguf_parameters()
+        hparams = self.hparams
+
+        self.gguf_writer.add_rope_dimension_count(hparams["qk_rope_head_dim"])
+        self.gguf_writer.add_q_lora_rank(hparams["q_lora_rank"])
+        self.gguf_writer.add_sliding_window(hparams["sliding_window"])
+
+        self.gguf_writer.add_expert_feed_forward_length(hparams["moe_intermediate_size"])
+        self.gguf_writer.add_expert_shared_count(hparams["n_shared_experts"])
+        self.gguf_writer.add_expert_weights_scale(hparams["routed_scaling_factor"])
+        self.gguf_writer.add_expert_weights_norm(hparams["norm_topk_prob"])
+        self.gguf_writer.add_swiglu_clamp_exp([hparams["swiglu_limit"]] * self.block_count)
+        self.gguf_writer.add_swiglu_clamp_shexp([hparams["swiglu_limit"]] * self.block_count)
+
+        self.gguf_writer.add_indexer_head_count(hparams["index_n_heads"])
+        self.gguf_writer.add_indexer_key_length(hparams["index_head_dim"])
+        self.gguf_writer.add_indexer_top_k(hparams["index_topk"])
+
+        self.gguf_writer.add_attention_output_group_count(hparams["o_groups"])
+        self.gguf_writer.add_attention_output_lora_rank(hparams["o_lora_rank"])
+        self.gguf_writer.add_attention_compress_ratios(hparams["compress_ratios"])
+        self.gguf_writer.add_attention_compress_rope_freq_base(hparams["compress_rope_theta"])
+        self.gguf_writer.add_hyper_connection_count(hparams["hc_mult"])
+        self.gguf_writer.add_hyper_connection_sinkhorn_iterations(hparams["hc_sinkhorn_iters"])
+        self.gguf_writer.add_hyper_connection_epsilon(hparams["hc_eps"])
+        self.gguf_writer.add_hash_layer_count(hparams["num_hash_layers"])
+
+    def dequant_model(self):
+        fp8_dtypes = self._float8_dtypes()
+        tensors_to_remove: list[str] = []
+
+        def dequant_fp8_weight(weight: Tensor, scale: Tensor) -> Tensor:
+            out_features, in_features = weight.shape
+            scale_f = self._e8m0_to_float(scale)
+            scale_f = scale_f.repeat_interleave(128, 0)[:out_features]
+            scale_f = scale_f.repeat_interleave(128, 1)[:, :in_features]
+            return weight.float() * scale_f
+
+        for name in list(self.model_tensors.keys()):
+            if not name.endswith(".scale"):
+                continue
+            weight_name = name.removesuffix(".scale") + ".weight"
+            if weight_name not in self.model_tensors:
+                continue
+
+            weight = self.model_tensors[weight_name]
+            scale = self.model_tensors[name]
+            if weight().dtype not in fp8_dtypes:
+                continue
+
+            self.model_tensors[weight_name] = lambda w=weight, s=scale: dequant_fp8_weight(w(), s())
+            self._dsv4_fp8_dequantized.add(weight_name)
+            tensors_to_remove.append(name)
+
+        for name in tensors_to_remove:
+            del self.model_tensors[name]
+
+    @staticmethod
+    def _pack_mxfp4_blocks(weight: Tensor, scale: Tensor) -> np.ndarray:
+        packed = weight.contiguous().view(torch.uint8)
+        scale_u8 = scale.contiguous().view(torch.uint8)
+
+        out_features, packed_cols = packed.shape
+        logical_cols = packed_cols * 2
+        if logical_cols % 32 != 0:
+            raise ValueError(f"MXFP4 source row has {logical_cols} values, expected a multiple of 32")
+
+        n_blocks = logical_cols // 32
+        if tuple(scale_u8.shape) != (out_features, n_blocks):
+            raise ValueError(f"MXFP4 scale shape {tuple(scale_u8.shape)} does not match {(out_features, n_blocks)}")
+
+        src = packed.reshape(out_features, n_blocks, 16)
+        low = src & 0x0F
+        high = (src >> 4) & 0x0F
+
+        # The safetensors bytes store adjacent values as low/high nibbles.
+        # ggml MXFP4 blocks store values 0..15 in low nibbles and 16..31 in high nibbles.
+        vals = torch.stack((low, high), dim=-1).reshape(out_features, n_blocks, 32)
+        qs = vals[:, :, :16] | (vals[:, :, 16:] << 4)
+        raw = torch.cat((scale_u8.unsqueeze(-1), qs.to(torch.uint8)), dim=-1)
+        return raw.reshape(out_features, n_blocks * 17).cpu().numpy()
+
+    def _write_mxfp4_expert_tensor(self, bid: int, proj: str, tensor_key: gguf.MODEL_TENSOR) -> list[str]:
+        n_experts = self.hparams["n_routed_experts"]
+        data: np.ndarray | None = None
+        consumed: list[str] = []
+
+        for eid in range(n_experts):
+            weight_name = f"layers.{bid}.ffn.experts.{eid}.{proj}.weight"
+            scale_name = f"layers.{bid}.ffn.experts.{eid}.{proj}.scale"
+            if weight_name not in self.model_tensors or scale_name not in self.model_tensors:
+                raise KeyError(f"Missing routed expert tensors for {weight_name}")
+
+            weight = LazyTorchTensor.to_eager(self.model_tensors[weight_name]())
+            scale = LazyTorchTensor.to_eager(self.model_tensors[scale_name]())
+            packed = self._pack_mxfp4_blocks(weight, scale)
+            if data is None:
+                data = np.empty((n_experts, *packed.shape), dtype=packed.dtype)
+            data[eid] = packed
+            consumed.extend((weight_name, scale_name))
+
+        assert data is not None
+        new_name = self.format_tensor_name(tensor_key, bid)
+        shape = gguf.quant_shape_from_byte_shape(data.shape, gguf.GGMLQuantizationType.MXFP4)
+        logger.info(f"{new_name}: repacked routed experts to MXFP4, shape = {{{', '.join(str(n) for n in reversed(shape))}}}")
+        self.gguf_writer.add_tensor(new_name, data, raw_dtype=gguf.GGMLQuantizationType.MXFP4)
+
+        return consumed
+
+    def _write_hash_routing_tensors(self) -> list[str]:
+        consumed: list[str] = []
+
+        for bid in range(self.hparams["num_hash_layers"]):
+            name = f"layers.{bid}.ffn.gate.tid2eid"
+            if name not in self.model_tensors:
+                raise KeyError(f"Missing hash routing tensor {name}")
+
+            data_torch = LazyTorchTensor.to_eager(self.model_tensors[name]())
+            data = data_torch.to(torch.int32).cpu().numpy()
+            new_name = self.format_tensor_name(gguf.MODEL_TENSOR.FFN_GATE_TID2EID, bid, ".weight")
+            logger.info(f"{new_name}: converted hash routing table to I32, shape = {{{', '.join(str(n) for n in reversed(data.shape))}}}")
+            self.gguf_writer.add_tensor(new_name, data)
+            consumed.append(name)
+
+        return consumed
+
+    def generate_extra_tensors(self) -> Iterable[tuple[str, Tensor]]:
+        if self._dsv4_mxfp4_generated:
+            return ()
+
+        consumed: list[str] = self._write_hash_routing_tensors()
+        for bid in range(self.block_count):
+            consumed.extend(self._write_mxfp4_expert_tensor(bid, "w1", gguf.MODEL_TENSOR.FFN_GATE_EXP))
+            consumed.extend(self._write_mxfp4_expert_tensor(bid, "w2", gguf.MODEL_TENSOR.FFN_DOWN_EXP))
+            consumed.extend(self._write_mxfp4_expert_tensor(bid, "w3", gguf.MODEL_TENSOR.FFN_UP_EXP))
+
+        for name in consumed:
+            del self.model_tensors[name]
+
+        self._dsv4_mxfp4_generated = True
+        return ()
+
+    def _format_dsv4_tensor_name(self, key: gguf.MODEL_TENSOR, bid: int | None, suffix: str = ".weight") -> str:
+        return self.format_tensor_name(key, bid, suffix)
+
+    def _map_dsv4_tensor_name(self, name: str, bid: int | None) -> tuple[gguf.MODEL_TENSOR, str]:
+        root_map: dict[str, tuple[gguf.MODEL_TENSOR, str]] = {
+            "embed.weight": (gguf.MODEL_TENSOR.TOKEN_EMBD, ".weight"),
+            "norm.weight": (gguf.MODEL_TENSOR.OUTPUT_NORM, ".weight"),
+            "head.weight": (gguf.MODEL_TENSOR.OUTPUT, ".weight"),
+            "hc_head_fn": (gguf.MODEL_TENSOR.HC_HEAD_FN, ".weight"),
+            "hc_head_base": (gguf.MODEL_TENSOR.HC_HEAD_BASE, ".weight"),
+            "hc_head_scale": (gguf.MODEL_TENSOR.HC_HEAD_SCALE, ".weight"),
+        }
+        if name in root_map:
+            return root_map[name]
+
+        match = re.match(r"layers\.(\d+)\.(.+)$", name)
+        if match is None:
+            raise ValueError(f"Unsupported DeepSeek-V4 tensor {name!r}")
+
+        layer = int(match.group(1))
+        if bid != layer:
+            raise ValueError(f"Tensor {name!r} parsed bid {bid} but layer name has {layer}")
+
+        layer_map: dict[str, tuple[gguf.MODEL_TENSOR, str]] = {
+            "hc_attn_fn": (gguf.MODEL_TENSOR.HC_ATTN_FN, ".weight"),
+            "hc_attn_base": (gguf.MODEL_TENSOR.HC_ATTN_BASE, ".weight"),
+            "hc_attn_scale": (gguf.MODEL_TENSOR.HC_ATTN_SCALE, ".weight"),
+            "hc_ffn_fn": (gguf.MODEL_TENSOR.HC_FFN_FN, ".weight"),
+            "hc_ffn_base": (gguf.MODEL_TENSOR.HC_FFN_BASE, ".weight"),
+            "hc_ffn_scale": (gguf.MODEL_TENSOR.HC_FFN_SCALE, ".weight"),
+            "attn.attn_sink": (gguf.MODEL_TENSOR.ATTN_SINKS, ".weight"),
+            "attn.wq_a.weight": (gguf.MODEL_TENSOR.ATTN_Q_A, ".weight"),
+            "attn.wq_b.weight": (gguf.MODEL_TENSOR.ATTN_Q_B, ".weight"),
+            "attn.q_norm.weight": (gguf.MODEL_TENSOR.ATTN_Q_A_NORM, ".weight"),
+            "attn.wkv.weight": (gguf.MODEL_TENSOR.ATTN_KV, ".weight"),
+            "attn.kv_norm.weight": (gguf.MODEL_TENSOR.ATTN_KV_NORM, ".weight"),
+            "attn.wo_a.weight": (gguf.MODEL_TENSOR.ATTN_OUT_A, ".weight"),
+            "attn.wo_b.weight": (gguf.MODEL_TENSOR.ATTN_OUT_B, ".weight"),
+            "attn.compressor.ape": (gguf.MODEL_TENSOR.ATTN_COMPRESSOR_APE, ".weight"),
+            "attn.compressor.wkv.weight": (gguf.MODEL_TENSOR.ATTN_COMPRESSOR_WKV, ".weight"),
+            "attn.compressor.wgate.weight": (gguf.MODEL_TENSOR.ATTN_COMPRESSOR_WGATE, ".weight"),
+            "attn.compressor.norm.weight": (gguf.MODEL_TENSOR.ATTN_COMPRESSOR_NORM, ".weight"),
+            "attn.indexer.wq_b.weight": (gguf.MODEL_TENSOR.INDEXER_ATTN_Q_B, ".weight"),
+            "attn.indexer.weights_proj.weight": (gguf.MODEL_TENSOR.INDEXER_PROJ, ".weight"),
+            "attn.indexer.compressor.ape": (gguf.MODEL_TENSOR.INDEXER_COMPRESSOR_APE, ".weight"),
+            "attn.indexer.compressor.wkv.weight": (gguf.MODEL_TENSOR.INDEXER_COMPRESSOR_WKV, ".weight"),
+            "attn.indexer.compressor.wgate.weight": (gguf.MODEL_TENSOR.INDEXER_COMPRESSOR_WGATE, ".weight"),
+            "attn.indexer.compressor.norm.weight": (gguf.MODEL_TENSOR.INDEXER_COMPRESSOR_NORM, ".weight"),
+            "attn_norm.weight": (gguf.MODEL_TENSOR.ATTN_NORM, ".weight"),
+            "ffn_norm.weight": (gguf.MODEL_TENSOR.FFN_NORM, ".weight"),
+            "ffn.gate.weight": (gguf.MODEL_TENSOR.FFN_GATE_INP, ".weight"),
+            "ffn.gate.bias": (gguf.MODEL_TENSOR.FFN_EXP_PROBS_B, ".bias"),
+            "ffn.gate.tid2eid": (gguf.MODEL_TENSOR.FFN_GATE_TID2EID, ".weight"),
+            "ffn.shared_experts.w1.weight": (gguf.MODEL_TENSOR.FFN_GATE_SHEXP, ".weight"),
+            "ffn.shared_experts.w2.weight": (gguf.MODEL_TENSOR.FFN_DOWN_SHEXP, ".weight"),
+            "ffn.shared_experts.w3.weight": (gguf.MODEL_TENSOR.FFN_UP_SHEXP, ".weight"),
+        }
+
+        tensor_name = match.group(2)
+        if tensor_name in layer_map:
+            return layer_map[tensor_name]
+
+        if re.match(r"ffn\.experts\.\d+\.w[123]\.(weight|scale)$", tensor_name):
+            return gguf.MODEL_TENSOR.FFN_GATE_EXP, ".weight"
+
+        raise ValueError(f"Unsupported DeepSeek-V4 tensor {name!r}")
+
+    def modify_tensors(self, data_torch: Tensor, name: str, bid: int | None) -> Iterable[tuple[str, Tensor]]:
+        if re.match(r"layers\.\d+\.ffn\.experts\.\d+\.w[123]\.(weight|scale)$", name):
+            return []
+
+        tensor_key, suffix = self._map_dsv4_tensor_name(name, bid)
+        if tensor_key == gguf.MODEL_TENSOR.FFN_GATE_TID2EID:
+            return []
+
+        return [(self._format_dsv4_tensor_name(tensor_key, bid, suffix), data_torch)]
+
+    def tensor_force_quant(self, name: str, new_name: str, bid: int | None, n_dims: int) -> gguf.GGMLQuantizationType | bool:
+        del new_name, bid  # unused
+
+        if name in self._dsv4_fp8_dequantized and n_dims >= 2:
+            return gguf.GGMLQuantizationType.Q8_0
+        if name in self._dsv4_f32_tensors:
+            return gguf.GGMLQuantizationType.F32
+        if name in self._dsv4_bf16_tensors and n_dims >= 2:
+            return gguf.GGMLQuantizationType.BF16
+
+        return False
+
+    def prepare_tensors(self):
+        super().prepare_tensors()
+        self._is_mxfp4 = True
+        self.ftype = gguf.LlamaFileType.MOSTLY_MXFP4_MOE
@@ -145,6 +145,7 @@ class Keys:
        TOKEN_SHIFT_COUNT                 = "{arch}.token_shift_count"
        INTERLEAVE_MOE_LAYER_STEP         = "{arch}.interleave_moe_layer_step"
        FULL_ATTENTION_INTERVAL           = "{arch}.full_attention_interval"
+        HASH_LAYER_COUNT                  = "{arch}.hash_layer_count"
        ACTIVATION_SPARSITY_SCALE         = "{arch}.activation_sparsity_scale"
        ALTUP_ACTIVE_IDX                  = "{arch}.altup.active_idx"
        ALTUP_NUM_INPUTS                  = "{arch}.altup.num_inputs"
@@ -180,8 +181,12 @@ class Keys:
        REL_BUCKETS_COUNT            = "{arch}.attention.relative_buckets_count"
        SLIDING_WINDOW               = "{arch}.attention.sliding_window"
        SCALE                        = "{arch}.attention.scale"
+        OUTPUT_GROUP_COUNT           = "{arch}.attention.output_group_count"
+        OUTPUT_LORA_RANK             = "{arch}.attention.output_lora_rank"
        OUTPUT_SCALE                 = "{arch}.attention.output_scale"
        VALUE_SCALE                  = "{arch}.attention.value_scale"
+        COMPRESS_RATIOS              = "{arch}.attention.compress_ratios"
+        COMPRESS_ROPE_FREQ_BASE      = "{arch}.attention.compress_rope_freq_base"
        TEMPERATURE_LENGTH           = "{arch}.attention.temperature_length"
        KEY_LENGTH_MLA               = "{arch}.attention.key_length_mla"
        VALUE_LENGTH_MLA             = "{arch}.attention.value_length_mla"
@@ -196,6 +201,11 @@ class Keys:
            KEY_LENGTH = "{arch}.attention.indexer.key_length"
            TOP_K      = "{arch}.attention.indexer.top_k"

+    class HyperConnection:
+        COUNT                = "{arch}.hyper_connection.count"
+        SINKHORN_ITERATIONS  = "{arch}.hyper_connection.sinkhorn_iterations"
+        EPSILON              = "{arch}.hyper_connection.epsilon"
+
    class Rope:
        DIMENSION_COUNT           = "{arch}.rope.dimension_count"
        DIMENSION_COUNT_SWA       = "{arch}.rope.dimension_count_swa"
@@ -470,6 +480,7 @@ class MODEL_ARCH(IntEnum):
    DEEPSEEK2        = auto()
    DEEPSEEK2OCR     = auto()
    DEEPSEEK32       = auto()
+    DEEPSEEK4        = auto()
    CHATGLM          = auto()
    GLM4             = auto()
    GLM4_MOE         = auto()
@@ -555,6 +566,9 @@ class MODEL_TENSOR(IntEnum):
    DENSE_2_OUT          = auto() # embeddinggemma 2_Dense
    DENSE_3_OUT          = auto() # embeddinggemma 3_Dense
    OUTPUT_NORM          = auto()
+    HC_HEAD_FN           = auto()
+    HC_HEAD_BASE         = auto()
+    HC_HEAD_SCALE        = auto()
    ROPE_FREQS           = auto()
    ROPE_FACTORS_LONG    = auto()
    ROPE_FACTORS_SHORT   = auto()
@@ -594,6 +608,7 @@ class MODEL_TENSOR(IntEnum):
    FFN_DOWN_CHEXP       = auto()
    FFN_UP_CHEXP         = auto()
    FFN_EXP_PROBS_B      = auto()
+    FFN_GATE_TID2EID     = auto()
    MOE_LATENT_DOWN      = auto() # nemotron 3 super
    MOE_LATENT_UP        = auto() # nemotron 3 super
    ATTN_Q_NORM          = auto()
@@ -681,6 +696,20 @@ class MODEL_TENSOR(IntEnum):
    ATTN_V_B             = auto()
    ATTN_Q_A_NORM        = auto()
    ATTN_KV_A_NORM       = auto()
+    ATTN_KV              = auto()
+    ATTN_KV_NORM         = auto()
+    ATTN_OUT_A           = auto()
+    ATTN_OUT_B           = auto()
+    HC_ATTN_FN           = auto()
+    HC_ATTN_BASE         = auto()
+    HC_ATTN_SCALE        = auto()
+    HC_FFN_FN            = auto()
+    HC_FFN_BASE          = auto()
+    HC_FFN_SCALE         = auto()
+    ATTN_COMPRESSOR_WKV  = auto()
+    ATTN_COMPRESSOR_WGATE = auto()
+    ATTN_COMPRESSOR_APE  = auto()
+    ATTN_COMPRESSOR_NORM = auto()
    FFN_SUB_NORM         = auto()
    ATTN_SUB_NORM        = auto()
    DEC_ATTN_NORM        = auto()
@@ -742,6 +771,10 @@ class MODEL_TENSOR(IntEnum):
    INDEXER_PROJ         = auto()
    INDEXER_ATTN_K       = auto()
    INDEXER_ATTN_Q_B     = auto()
+    INDEXER_COMPRESSOR_WKV = auto()
+    INDEXER_COMPRESSOR_WGATE = auto()
+    INDEXER_COMPRESSOR_APE = auto()
+    INDEXER_COMPRESSOR_NORM = auto()
    # vision
    V_MMPROJ             = auto()
    V_MMPROJ_FC          = auto()
@@ -1027,6 +1060,7 @@ MODEL_ARCH_NAMES: dict[MODEL_ARCH, str] = {
    MODEL_ARCH.DEEPSEEK2:        "deepseek2",
    MODEL_ARCH.DEEPSEEK2OCR:     "deepseek2-ocr",
    MODEL_ARCH.DEEPSEEK32:       "deepseek32",
+    MODEL_ARCH.DEEPSEEK4:        "deepseek4",
    MODEL_ARCH.CHATGLM:          "chatglm",
    MODEL_ARCH.GLM4:             "glm4",
    MODEL_ARCH.GLM4_MOE:         "glm4moe",
@@ -1111,6 +1145,9 @@ TENSOR_NAMES: dict[MODEL_TENSOR, str] = {
    MODEL_TENSOR.OUTPUT:                    "output",
    MODEL_TENSOR.DENSE_2_OUT:               "dense_2", # embeddinggemma 2_Dense
    MODEL_TENSOR.DENSE_3_OUT:               "dense_3", # embeddinggemma 2_Dense
+    MODEL_TENSOR.HC_HEAD_FN:                "output_hc_fn",
+    MODEL_TENSOR.HC_HEAD_BASE:              "output_hc_base",
+    MODEL_TENSOR.HC_HEAD_SCALE:             "output_hc_scale",
    MODEL_TENSOR.ROPE_FREQS:                "rope_freqs",
    MODEL_TENSOR.ROPE_FACTORS_LONG:         "rope_factors_long",
    MODEL_TENSOR.ROPE_FACTORS_SHORT:        "rope_factors_short",
@@ -1152,6 +1189,7 @@ TENSOR_NAMES: dict[MODEL_TENSOR, str] = {
    MODEL_TENSOR.FFN_UP_EXP:                "blk.{bid}.ffn_up_exps",
    MODEL_TENSOR.FFN_GATE_UP_EXP:           "blk.{bid}.ffn_gate_up_exps",
    MODEL_TENSOR.FFN_EXP_PROBS_B:           "blk.{bid}.exp_probs_b",
+    MODEL_TENSOR.FFN_GATE_TID2EID:          "blk.{bid}.ffn_gate_tid2eid",
    MODEL_TENSOR.MOE_LATENT_DOWN:           "blk.{bid}.ffn_latent_down",      # nemotron 3 super
    MODEL_TENSOR.MOE_LATENT_UP:             "blk.{bid}.ffn_latent_up",        # nemotron 3 super
    MODEL_TENSOR.LAYER_OUT_NORM:            "blk.{bid}.layer_output_norm",
@@ -1237,6 +1275,20 @@ TENSOR_NAMES: dict[MODEL_TENSOR, str] = {
    MODEL_TENSOR.ATTN_V_B:                  "blk.{bid}.attn_v_b",
    MODEL_TENSOR.ATTN_Q_A_NORM:             "blk.{bid}.attn_q_a_norm",
    MODEL_TENSOR.ATTN_KV_A_NORM:            "blk.{bid}.attn_kv_a_norm",
+    MODEL_TENSOR.ATTN_KV:                   "blk.{bid}.attn_kv",
+    MODEL_TENSOR.ATTN_KV_NORM:              "blk.{bid}.attn_kv_a_norm",
+    MODEL_TENSOR.ATTN_OUT_A:                "blk.{bid}.attn_output_a",
+    MODEL_TENSOR.ATTN_OUT_B:                "blk.{bid}.attn_output_b",
+    MODEL_TENSOR.HC_ATTN_FN:                "blk.{bid}.hc_attn_fn",
+    MODEL_TENSOR.HC_ATTN_BASE:              "blk.{bid}.hc_attn_base",
+    MODEL_TENSOR.HC_ATTN_SCALE:             "blk.{bid}.hc_attn_scale",
+    MODEL_TENSOR.HC_FFN_FN:                 "blk.{bid}.hc_ffn_fn",
+    MODEL_TENSOR.HC_FFN_BASE:               "blk.{bid}.hc_ffn_base",
+    MODEL_TENSOR.HC_FFN_SCALE:              "blk.{bid}.hc_ffn_scale",
+    MODEL_TENSOR.ATTN_COMPRESSOR_WKV:       "blk.{bid}.attn_compressor_kv",
+    MODEL_TENSOR.ATTN_COMPRESSOR_WGATE:     "blk.{bid}.attn_compressor_gate",
+    MODEL_TENSOR.ATTN_COMPRESSOR_APE:       "blk.{bid}.attn_compressor_ape",
+    MODEL_TENSOR.ATTN_COMPRESSOR_NORM:      "blk.{bid}.attn_compressor_norm",
    MODEL_TENSOR.ATTN_SUB_NORM:             "blk.{bid}.attn_sub_norm",
    MODEL_TENSOR.FFN_SUB_NORM:              "blk.{bid}.ffn_sub_norm",
    MODEL_TENSOR.DEC_ATTN_NORM:             "dec.blk.{bid}.attn_norm",
@@ -1298,6 +1350,10 @@ TENSOR_NAMES: dict[MODEL_TENSOR, str] = {
    MODEL_TENSOR.INDEXER_PROJ:              "blk.{bid}.indexer.proj",
    MODEL_TENSOR.INDEXER_ATTN_K:            "blk.{bid}.indexer.attn_k",
    MODEL_TENSOR.INDEXER_ATTN_Q_B:          "blk.{bid}.indexer.attn_q_b",
+    MODEL_TENSOR.INDEXER_COMPRESSOR_WKV:    "blk.{bid}.indexer_compressor_kv",
+    MODEL_TENSOR.INDEXER_COMPRESSOR_WGATE:  "blk.{bid}.indexer_compressor_gate",
+    MODEL_TENSOR.INDEXER_COMPRESSOR_APE:    "blk.{bid}.indexer_compressor_ape",
+    MODEL_TENSOR.INDEXER_COMPRESSOR_NORM:   "blk.{bid}.indexer_compressor_norm",
    # vision
    MODEL_TENSOR.V_MMPROJ:                  "mm.{bid}",
    MODEL_TENSOR.V_MMPROJ_FC:               "mm.model.fc",
@@ -3138,6 +3194,49 @@ MODEL_TENSORS: dict[MODEL_ARCH, list[MODEL_TENSOR]] = {
        MODEL_TENSOR.NEXTN_SHARED_HEAD_HEAD,
        MODEL_TENSOR.NEXTN_SHARED_HEAD_NORM,
    ],
+    MODEL_ARCH.DEEPSEEK4: [
+        MODEL_TENSOR.TOKEN_EMBD,
+        MODEL_TENSOR.OUTPUT_NORM,
+        MODEL_TENSOR.OUTPUT,
+        MODEL_TENSOR.HC_HEAD_FN,
+        MODEL_TENSOR.HC_HEAD_BASE,
+        MODEL_TENSOR.HC_HEAD_SCALE,
+        MODEL_TENSOR.ATTN_NORM,
+        MODEL_TENSOR.ATTN_SINKS,
+        MODEL_TENSOR.ATTN_Q_A,
+        MODEL_TENSOR.ATTN_Q_B,
+        MODEL_TENSOR.ATTN_Q_A_NORM,
+        MODEL_TENSOR.ATTN_KV,
+        MODEL_TENSOR.ATTN_KV_NORM,
+        MODEL_TENSOR.ATTN_OUT_A,
+        MODEL_TENSOR.ATTN_OUT_B,
+        MODEL_TENSOR.HC_ATTN_FN,
+        MODEL_TENSOR.HC_ATTN_BASE,
+        MODEL_TENSOR.HC_ATTN_SCALE,
+        MODEL_TENSOR.HC_FFN_FN,
+        MODEL_TENSOR.HC_FFN_BASE,
+        MODEL_TENSOR.HC_FFN_SCALE,
+        MODEL_TENSOR.ATTN_COMPRESSOR_WKV,
+        MODEL_TENSOR.ATTN_COMPRESSOR_WGATE,
+        MODEL_TENSOR.ATTN_COMPRESSOR_APE,
+        MODEL_TENSOR.ATTN_COMPRESSOR_NORM,
+        MODEL_TENSOR.INDEXER_PROJ,
+        MODEL_TENSOR.INDEXER_ATTN_Q_B,
+        MODEL_TENSOR.INDEXER_COMPRESSOR_WKV,
+        MODEL_TENSOR.INDEXER_COMPRESSOR_WGATE,
+        MODEL_TENSOR.INDEXER_COMPRESSOR_APE,
+        MODEL_TENSOR.INDEXER_COMPRESSOR_NORM,
+        MODEL_TENSOR.FFN_GATE_INP,
+        MODEL_TENSOR.FFN_GATE_TID2EID,
+        MODEL_TENSOR.FFN_EXP_PROBS_B,
+        MODEL_TENSOR.FFN_NORM,
+        MODEL_TENSOR.FFN_GATE_EXP,
+        MODEL_TENSOR.FFN_DOWN_EXP,
+        MODEL_TENSOR.FFN_UP_EXP,
+        MODEL_TENSOR.FFN_GATE_SHEXP,
+        MODEL_TENSOR.FFN_DOWN_SHEXP,
+        MODEL_TENSOR.FFN_UP_SHEXP,
+    ],
    MODEL_ARCH.ERNIE4_5_MOE: [
        MODEL_TENSOR.TOKEN_EMBD,
        MODEL_TENSOR.OUTPUT_NORM,
@@ -4437,8 +4536,9 @@ class GGMLQuantizationType(IntEnum):


 class ExpertGatingFuncType(IntEnum):
-    SOFTMAX  = 1
-    SIGMOID  = 2
+    SOFTMAX       = 1
+    SIGMOID       = 2
+    SQRTSOFTPLUS  = 4


 # TODO: add GGMLFileType from ggml_ftype in ggml.h
@@ -715,6 +715,9 @@ class GGUFWriter:
    def add_full_attention_interval(self, interval: int) -> None:
        self.add_uint32(Keys.LLM.FULL_ATTENTION_INTERVAL.format(arch=self.arch), interval)

+    def add_hash_layer_count(self, count: int) -> None:
+        self.add_uint32(Keys.LLM.HASH_LAYER_COUNT.format(arch=self.arch), count)
+
    def add_feed_forward_length(self, length: int | Sequence[int]) -> None:
        if isinstance(length, int):
            self.add_uint32(Keys.LLM.FEED_FORWARD_LENGTH.format(arch=self.arch), length)
@@ -952,6 +955,27 @@ class GGUFWriter:
    def add_norm_before_residual(self, value: bool) -> None:
        self.add_bool(Keys.LLM.NORM_BEFORE_RESIDUAL.format(arch=self.arch), value)

+    def add_attention_output_group_count(self, count: int) -> None:
+        self.add_uint32(Keys.Attention.OUTPUT_GROUP_COUNT.format(arch=self.arch), count)
+
+    def add_attention_output_lora_rank(self, length: int) -> None:
+        self.add_uint32(Keys.Attention.OUTPUT_LORA_RANK.format(arch=self.arch), length)
+
+    def add_attention_compress_ratios(self, values: Sequence[int]) -> None:
+        self.add_array(Keys.Attention.COMPRESS_RATIOS.format(arch=self.arch), values)
+
+    def add_attention_compress_rope_freq_base(self, value: float) -> None:
+        self.add_float32(Keys.Attention.COMPRESS_ROPE_FREQ_BASE.format(arch=self.arch), value)
+
+    def add_hyper_connection_count(self, count: int) -> None:
+        self.add_uint32(Keys.HyperConnection.COUNT.format(arch=self.arch), count)
+
+    def add_hyper_connection_sinkhorn_iterations(self, count: int) -> None:
+        self.add_uint32(Keys.HyperConnection.SINKHORN_ITERATIONS.format(arch=self.arch), count)
+
+    def add_hyper_connection_epsilon(self, value: float) -> None:
+        self.add_float32(Keys.HyperConnection.EPSILON.format(arch=self.arch), value)
+
    def add_attention_scale(self, value: float) -> None:
        self.add_float32(Keys.Attention.SCALE.format(arch=self.arch), value)

@@ -0,0 +1,112 @@
+{%- if not add_generation_prompt is defined -%}
+  {%- set add_generation_prompt = false -%}
+{%- endif -%}
+{%- if not thinking is defined -%}
+  {%- if enable_thinking is defined -%}
+    {%- set thinking = enable_thinking -%}
+  {%- else -%}
+    {%- set thinking = false -%}
+  {%- endif -%}
+{%- endif -%}
+{%- set dsml_token = '｜DSML｜' -%}
+{%- set thinking_start_token = '<think>' -%}
+{%- set thinking_end_token = '</think>' -%}
+{%- set tools_header = '## Tools\n\nYou have access to a set of tools to help answer the user\'s question. You can invoke tools by writing a "<' + dsml_token + 'tool_calls>" block like the following:\n\n<' + dsml_token + 'tool_calls>\n<' + dsml_token + 'invoke name="$TOOL_NAME">\n<' + dsml_token + 'parameter name="$PARAMETER_NAME" string="true|false">$PARAMETER_VALUE</' + dsml_token + 'parameter>\n...\n</' + dsml_token + 'invoke>\n<' + dsml_token + 'invoke name="$TOOL_NAME2">\n...\n</' + dsml_token + 'invoke>\n</' + dsml_token + 'tool_calls>\n\nString parameters should be specified as is and set `string="true"`. For all other types (numbers, booleans, arrays, objects), pass the value in JSON format and set `string="false"`.\n\nIf thinking_mode is enabled (triggered by ' + thinking_start_token + '), you MUST output your complete reasoning inside ' + thinking_start_token + '...' + thinking_end_token + ' BEFORE any tool calls or final response.\n\nOtherwise, output directly after ' + thinking_end_token + ' with tool calls or final response.\n\n### Available Tool Schemas\n\n' -%}
+{%- set tools_footer = '\nYou MUST strictly follow the above defined tool name and parameter schemas to invoke tool calls.\n' -%}
+{%- set ns = namespace(system_prompt='', is_first_sp=true) -%}
+{%- for message in messages -%}
+  {%- if message['role'] == 'system' -%}
+    {%- if ns.is_first_sp -%}
+      {%- set ns.system_prompt = ns.system_prompt + (message['content'] or '') -%}
+      {%- set ns.is_first_sp = false -%}
+    {%- else -%}
+      {%- set ns.system_prompt = ns.system_prompt + '\n\n' + (message['content'] or '') -%}
+    {%- endif -%}
+  {%- endif -%}
+{%- endfor -%}
+{%- if tools is defined and tools -%}
+  {%- set ts = namespace(schemas='') -%}
+  {%- for tool in tools -%}
+    {%- if tool['type'] == 'function' -%}
+      {%- set ts.schemas = ts.schemas + (tool['function'] | tojson) + '\n' -%}
+    {%- endif -%}
+  {%- endfor -%}
+  {%- if ns.system_prompt -%}
+    {%- set ns.system_prompt = ns.system_prompt + '\n\n' + tools_header + ts.schemas + tools_footer -%}
+  {%- else -%}
+    {%- set ns.system_prompt = tools_header + ts.schemas + tools_footer -%}
+  {%- endif -%}
+{%- endif -%}
+{{- bos_token -}}
+{{- ns.system_prompt -}}
+{%- set last_user_idx = namespace(value=-1) -%}
+{%- for message in messages -%}
+  {%- if message['role'] == 'user' or message['role'] == 'developer' or message['role'] == 'tool' -%}
+    {%- set last_user_idx.value = loop.index0 -%}
+  {%- endif -%}
+{%- endfor -%}
+{%- set state = namespace(in_user=false) -%}
+{%- for message in messages -%}
+  {%- if message['role'] == 'user' or message['role'] == 'developer' -%}
+    {%- if state.in_user -%}
+      {{- '\n\n' -}}
+    {%- else -%}
+      {{- '<｜User｜>' -}}
+      {%- set state.in_user = true -%}
+    {%- endif -%}
+    {{- message['content'] or '' -}}
+  {%- elif message['role'] == 'tool' -%}
+    {%- if state.in_user -%}
+      {{- '\n\n' -}}
+    {%- else -%}
+      {{- '<｜User｜>' -}}
+      {%- set state.in_user = true -%}
+    {%- endif -%}
+    {{- '<tool_result>' + (message['content'] or '') + '</tool_result>' -}}
+  {%- elif message['role'] == 'assistant' -%}
+    {%- set state.in_user = false -%}
+    {{- '<｜Assistant｜>' -}}
+    {%- set is_after_last_user = loop.index0 > last_user_idx.value -%}
+    {%- if is_after_last_user and thinking -%}
+      {{- thinking_start_token -}}
+      {%- if message['reasoning_content'] is defined and message['reasoning_content'] -%}
+        {{- message['reasoning_content'] -}}
+      {%- endif -%}
+      {{- thinking_end_token -}}
+    {%- else -%}
+      {{- thinking_end_token -}}
+    {%- endif -%}
+    {%- if message['content'] is defined and message['content'] -%}
+      {{- message['content'] -}}
+    {%- endif -%}
+    {%- if message['tool_calls'] -%}
+      {{- '\n\n<' + dsml_token + 'tool_calls>\n' -}}
+      {%- for tool in message['tool_calls'] -%}
+        {%- set func = tool['function'] -%}
+        {{- '<' + dsml_token + 'invoke name="' + func['name'] + '">\n' -}}
+        {%- set args = func['arguments'] -%}
+        {%- if args is string -%}
+          {%- set args = args | from_json -%}
+        {%- endif -%}
+        {%- for key, val in args.items() -%}
+          {%- if val is string -%}
+            {{- '<' + dsml_token + 'parameter name="' + key + '" string="true">' + val + '</' + dsml_token + 'parameter>\n' -}}
+          {%- else -%}
+            {{- '<' + dsml_token + 'parameter name="' + key + '" string="false">' + (val | tojson) + '</' + dsml_token + 'parameter>\n' -}}
+          {%- endif -%}
+        {%- endfor -%}
+        {{- '</' + dsml_token + 'invoke>\n' -}}
+      {%- endfor -%}
+      {{- '</' + dsml_token + 'tool_calls>' -}}
+    {%- endif -%}
+    {{- '<｜end▁of▁sentence｜>' -}}
+  {%- endif -%}
+{%- endfor -%}
+{%- if add_generation_prompt -%}
+  {{- '<｜Assistant｜>' -}}
+  {%- if thinking -%}
+    {{- thinking_start_token -}}
+  {%- else -%}
+    {{- thinking_end_token -}}
+  {%- endif -%}
+{%- endif -%}
@@ -25,6 +25,7 @@ add_library(llama
            llama-kv-cache.cpp
            llama-kv-cache-iswa.cpp
            llama-kv-cache-dsa.cpp
+            llama-kv-cache-dsv4.cpp
            llama-memory.cpp
            llama-memory-hybrid.cpp
            llama-memory-hybrid-iswa.cpp
@@ -77,6 +77,7 @@ static const std::map<llm_arch, const char *> LLM_ARCH_NAMES = {
    { LLM_ARCH_DEEPSEEK2,        "deepseek2"        },
    { LLM_ARCH_DEEPSEEK2OCR,     "deepseek2-ocr"    },
    { LLM_ARCH_DEEPSEEK32,       "deepseek32"       },
+    { LLM_ARCH_DEEPSEEK4,        "deepseek4"        },
    { LLM_ARCH_CHATGLM,          "chatglm"          },
    { LLM_ARCH_GLM4,             "glm4"             },
    { LLM_ARCH_GLM4_MOE,         "glm4moe"          },
@@ -250,9 +251,19 @@ static const std::map<llm_kv, const char *> LLM_KV_NAMES = {
    { LLM_KV_ATTENTION_INDEXER_HEAD_COUNT,           "%s.attention.indexer.head_count"           },
    { LLM_KV_ATTENTION_INDEXER_KEY_LENGTH,           "%s.attention.indexer.key_length"           },
    { LLM_KV_ATTENTION_INDEXER_TOP_K,                "%s.attention.indexer.top_k"                },
+    { LLM_KV_ATTENTION_OUTPUT_GROUP_COUNT,           "%s.attention.output_group_count"           },
+    { LLM_KV_ATTENTION_OUTPUT_LORA_RANK,             "%s.attention.output_lora_rank"             },
+    { LLM_KV_ATTENTION_COMPRESS_ROPE_FREQ_BASE,      "%s.attention.compress_rope_freq_base"      },
+    { LLM_KV_ATTENTION_COMPRESS_RATIOS,              "%s.attention.compress_ratios"              },
    { LLM_KV_ATTENTION_SHARED_KV_LAYERS,             "%s.attention.shared_kv_layers"             },
    { LLM_KV_ATTENTION_RECURRENT_LAYERS,             "%s.attention.recurrent_layers"             },

+    { LLM_KV_HYPER_CONNECTION_COUNT,                 "%s.hyper_connection.count"                 },
+    { LLM_KV_HYPER_CONNECTION_SINKHORN_ITERATIONS,   "%s.hyper_connection.sinkhorn_iterations"   },
+    { LLM_KV_HYPER_CONNECTION_EPSILON,               "%s.hyper_connection.epsilon"               },
+
+    { LLM_KV_HASH_LAYER_COUNT,                       "%s.hash_layer_count"                       },
+
    { LLM_KV_ROPE_DIMENSION_COUNT,           "%s.rope.dimension_count"                 },
    { LLM_KV_ROPE_DIMENSION_COUNT_SWA,       "%s.rope.dimension_count_swa"             },
    { LLM_KV_ROPE_DIMENSION_SECTIONS,        "%s.rope.dimension_sections"              },
@@ -440,6 +451,23 @@ static const std::map<llm_tensor, const char *> LLM_TENSOR_NAMES = {
    { LLM_TENSOR_ATTN_Q_B,                               "blk.%d.attn_q_b" },
    { LLM_TENSOR_ATTN_KV_A_MQA,                          "blk.%d.attn_kv_a_mqa" },
    { LLM_TENSOR_ATTN_KV_B,                              "blk.%d.attn_kv_b" },
+    { LLM_TENSOR_ATTN_KV,                                "blk.%d.attn_kv" },
+    { LLM_TENSOR_ATTN_KV_NORM,                           "blk.%d.attn_kv_a_norm" },
+    { LLM_TENSOR_ATTN_OUT_A,                             "blk.%d.attn_output_a" },
+    { LLM_TENSOR_ATTN_OUT_B,                             "blk.%d.attn_output_b" },
+    { LLM_TENSOR_HC_HEAD_FN,                             "output_hc_fn" },
+    { LLM_TENSOR_HC_HEAD_BASE,                           "output_hc_base" },
+    { LLM_TENSOR_HC_HEAD_SCALE,                          "output_hc_scale" },
+    { LLM_TENSOR_HC_ATTN_FN,                             "blk.%d.hc_attn_fn" },
+    { LLM_TENSOR_HC_ATTN_BASE,                           "blk.%d.hc_attn_base" },
+    { LLM_TENSOR_HC_ATTN_SCALE,                          "blk.%d.hc_attn_scale" },
+    { LLM_TENSOR_HC_FFN_FN,                              "blk.%d.hc_ffn_fn" },
+    { LLM_TENSOR_HC_FFN_BASE,                            "blk.%d.hc_ffn_base" },
+    { LLM_TENSOR_HC_FFN_SCALE,                           "blk.%d.hc_ffn_scale" },
+    { LLM_TENSOR_ATTN_COMPRESSOR_WKV,                    "blk.%d.attn_compressor_kv" },
+    { LLM_TENSOR_ATTN_COMPRESSOR_WGATE,                  "blk.%d.attn_compressor_gate" },
+    { LLM_TENSOR_ATTN_COMPRESSOR_APE,                    "blk.%d.attn_compressor_ape" },
+    { LLM_TENSOR_ATTN_COMPRESSOR_NORM,                   "blk.%d.attn_compressor_norm" },
    { LLM_TENSOR_PER_LAYER_TOKEN_EMBD,                   "per_layer_token_embd" },
    { LLM_TENSOR_PER_LAYER_MODEL_PROJ,                   "per_layer_model_proj" },
    { LLM_TENSOR_PER_LAYER_PROJ_NORM,                    "per_layer_proj_norm" },
@@ -566,6 +594,11 @@ static const std::map<llm_tensor, const char *> LLM_TENSOR_NAMES = {
    { LLM_TENSOR_INDEXER_PROJ,                           "blk.%d.indexer.proj" },
    { LLM_TENSOR_INDEXER_ATTN_K,                         "blk.%d.indexer.attn_k" },
    { LLM_TENSOR_INDEXER_ATTN_Q_B,                       "blk.%d.indexer.attn_q_b" },
+    { LLM_TENSOR_INDEXER_COMPRESSOR_WKV,                 "blk.%d.indexer_compressor_kv" },
+    { LLM_TENSOR_INDEXER_COMPRESSOR_WGATE,               "blk.%d.indexer_compressor_gate" },
+    { LLM_TENSOR_INDEXER_COMPRESSOR_APE,                 "blk.%d.indexer_compressor_ape" },
+    { LLM_TENSOR_INDEXER_COMPRESSOR_NORM,                "blk.%d.indexer_compressor_norm" },
+    { LLM_TENSOR_FFN_GATE_TID2EID,                       "blk.%d.ffn_gate_tid2eid" },
    { LLM_TENSOR_MASKED_EMBD_CENTROIDS,                  "masked_embd_centroids" },
    { LLM_TENSOR_MASKED_EMBD_ORDERING,                   "masked_embd_ordering" },
    { LLM_TENSOR_FC,                                     "fc" },
@@ -616,6 +649,23 @@ static const std::map<llm_tensor, llm_tensor_info> LLM_TENSOR_INFOS = {
    {LLM_TENSOR_ATTN_Q_B,                   {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
    {LLM_TENSOR_ATTN_KV_A_MQA,              {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
    {LLM_TENSOR_ATTN_KV_B,                  {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_ATTN_KV,                    {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_ATTN_KV_NORM,               {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL}},
+    {LLM_TENSOR_ATTN_OUT_A,                 {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_ATTN_OUT_B,                 {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_HC_HEAD_FN,                 {LLM_TENSOR_LAYER_OUTPUT,    GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_HC_HEAD_BASE,               {LLM_TENSOR_LAYER_OUTPUT,    GGML_OP_ADD}},
+    {LLM_TENSOR_HC_HEAD_SCALE,              {LLM_TENSOR_LAYER_OUTPUT,    GGML_OP_MUL}},
+    {LLM_TENSOR_HC_ATTN_FN,                 {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_HC_ATTN_BASE,               {LLM_TENSOR_LAYER_REPEATING, GGML_OP_ADD}},
+    {LLM_TENSOR_HC_ATTN_SCALE,              {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL}},
+    {LLM_TENSOR_HC_FFN_FN,                  {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_HC_FFN_BASE,                {LLM_TENSOR_LAYER_REPEATING, GGML_OP_ADD}},
+    {LLM_TENSOR_HC_FFN_SCALE,               {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL}},
+    {LLM_TENSOR_ATTN_COMPRESSOR_WKV,        {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_ATTN_COMPRESSOR_WGATE,      {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_ATTN_COMPRESSOR_APE,        {LLM_TENSOR_LAYER_REPEATING, GGML_OP_ADD}},
+    {LLM_TENSOR_ATTN_COMPRESSOR_NORM,       {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL}},
    {LLM_TENSOR_ATTN_K_B,                   {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
    {LLM_TENSOR_ATTN_V_B,                   {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
    {LLM_TENSOR_ATTN_SINKS,                 {LLM_TENSOR_LAYER_REPEATING, GGML_OP_SCALE}},
@@ -779,6 +829,11 @@ static const std::map<llm_tensor, llm_tensor_info> LLM_TENSOR_INFOS = {
    {LLM_TENSOR_INDEXER_PROJ,               {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
    {LLM_TENSOR_INDEXER_ATTN_K,             {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
    {LLM_TENSOR_INDEXER_ATTN_Q_B,           {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_INDEXER_COMPRESSOR_WKV,     {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_INDEXER_COMPRESSOR_WGATE,   {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
+    {LLM_TENSOR_INDEXER_COMPRESSOR_APE,     {LLM_TENSOR_LAYER_REPEATING, GGML_OP_ADD}},
+    {LLM_TENSOR_INDEXER_COMPRESSOR_NORM,    {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL}},
+    {LLM_TENSOR_FFN_GATE_TID2EID,           {LLM_TENSOR_LAYER_REPEATING, GGML_OP_GET_ROWS}},
    {LLM_TENSOR_NEXTN_PROJ_PRE,             {LLM_TENSOR_LAYER_REPEATING, GGML_OP_MUL_MAT}},
    {LLM_TENSOR_NEXTN_PROJ_POST,            {LLM_TENSOR_LAYER_OUTPUT,    GGML_OP_MUL_MAT}},
    // NextN/MTP tensors are stored per-block (blk.%d.nextn.*) even though only the
@@ -933,6 +988,7 @@ bool llm_arch_supports_sm_tensor(const llm_arch & arch) {
        case LLM_ARCH_OLMOE:
        case LLM_ARCH_DEEPSEEK2:
        case LLM_ARCH_DEEPSEEK32:
+        case LLM_ARCH_DEEPSEEK4:
        case LLM_ARCH_GLM_DSA:
        case LLM_ARCH_BITNET:
        case LLM_ARCH_T5:
@@ -82,6 +82,7 @@ enum llm_arch {
    LLM_ARCH_DEEPSEEK2,
    LLM_ARCH_DEEPSEEK2OCR,
    LLM_ARCH_DEEPSEEK32,
+    LLM_ARCH_DEEPSEEK4,
    LLM_ARCH_CHATGLM,
    LLM_ARCH_GLM4,
    LLM_ARCH_GLM4_MOE,
@@ -255,9 +256,19 @@ enum llm_kv {
    LLM_KV_ATTENTION_INDEXER_HEAD_COUNT,
    LLM_KV_ATTENTION_INDEXER_KEY_LENGTH,
    LLM_KV_ATTENTION_INDEXER_TOP_K,
+    LLM_KV_ATTENTION_OUTPUT_GROUP_COUNT,
+    LLM_KV_ATTENTION_OUTPUT_LORA_RANK,
+    LLM_KV_ATTENTION_COMPRESS_ROPE_FREQ_BASE,
+    LLM_KV_ATTENTION_COMPRESS_RATIOS,
    LLM_KV_ATTENTION_SHARED_KV_LAYERS,
    LLM_KV_ATTENTION_RECURRENT_LAYERS,

+    LLM_KV_HYPER_CONNECTION_COUNT,
+    LLM_KV_HYPER_CONNECTION_SINKHORN_ITERATIONS,
+    LLM_KV_HYPER_CONNECTION_EPSILON,
+
+    LLM_KV_HASH_LAYER_COUNT,
+
    LLM_KV_ROPE_DIMENSION_COUNT,
    LLM_KV_ROPE_DIMENSION_COUNT_SWA,
    LLM_KV_ROPE_DIMENSION_SECTIONS,
@@ -501,10 +512,27 @@ enum llm_tensor {
    LLM_TENSOR_ATTN_Q_B,
    LLM_TENSOR_ATTN_KV_A_MQA,
    LLM_TENSOR_ATTN_KV_B,
+    LLM_TENSOR_ATTN_KV,
+    LLM_TENSOR_ATTN_KV_NORM,
+    LLM_TENSOR_ATTN_OUT_A,
+    LLM_TENSOR_ATTN_OUT_B,
    LLM_TENSOR_ATTN_K_B,
    LLM_TENSOR_ATTN_V_B,
    LLM_TENSOR_ATTN_Q_A_NORM,
    LLM_TENSOR_ATTN_KV_A_NORM,
+    LLM_TENSOR_HC_HEAD_FN,
+    LLM_TENSOR_HC_HEAD_BASE,
+    LLM_TENSOR_HC_HEAD_SCALE,
+    LLM_TENSOR_HC_ATTN_FN,
+    LLM_TENSOR_HC_ATTN_BASE,
+    LLM_TENSOR_HC_ATTN_SCALE,
+    LLM_TENSOR_HC_FFN_FN,
+    LLM_TENSOR_HC_FFN_BASE,
+    LLM_TENSOR_HC_FFN_SCALE,
+    LLM_TENSOR_ATTN_COMPRESSOR_WKV,
+    LLM_TENSOR_ATTN_COMPRESSOR_WGATE,
+    LLM_TENSOR_ATTN_COMPRESSOR_APE,
+    LLM_TENSOR_ATTN_COMPRESSOR_NORM,
    LLM_TENSOR_ATTN_SUB_NORM,
    LLM_TENSOR_FFN_SUB_NORM,
    LLM_TENSOR_DEC_ATTN_NORM,
@@ -566,6 +594,11 @@ enum llm_tensor {
    LLM_TENSOR_INDEXER_PROJ,
    LLM_TENSOR_INDEXER_ATTN_K,
    LLM_TENSOR_INDEXER_ATTN_Q_B,
+    LLM_TENSOR_INDEXER_COMPRESSOR_WKV,
+    LLM_TENSOR_INDEXER_COMPRESSOR_WGATE,
+    LLM_TENSOR_INDEXER_COMPRESSOR_APE,
+    LLM_TENSOR_INDEXER_COMPRESSOR_NORM,
+    LLM_TENSOR_FFN_GATE_TID2EID,
    LLM_TENSOR_NEXTN_PROJ_PRE,
    LLM_TENSOR_NEXTN_PROJ_POST,
    LLM_TENSOR_NEXTN_EH_PROJ,
@@ -2321,7 +2321,11 @@ void llama_context::output_reorder() {
 //

 uint32_t llama_context::graph_max_nodes(uint32_t n_tokens) const {
-    if (model.arch == LLM_ARCH_QWEN3NEXT || model.arch == LLM_ARCH_KIMI_LINEAR || model.arch == LLM_ARCH_QWEN35 || model.arch == LLM_ARCH_QWEN35MOE) {
+    if (model.arch == LLM_ARCH_QWEN3NEXT ||
+        model.arch == LLM_ARCH_KIMI_LINEAR ||
+        model.arch == LLM_ARCH_QWEN35 ||
+        model.arch == LLM_ARCH_QWEN35MOE ||
+        model.arch == LLM_ARCH_DEEPSEEK4) {
        return std::max<uint32_t>(n_tokens * 40, 32u * model.n_tensors());
    }
    uint32_t res = std::max<uint32_t>(1024u, 8u*model.n_tensors());
@@ -8,6 +8,7 @@
 #include "llama-kv-cache.h"
 #include "llama-kv-cache-iswa.h"
 #include "llama-kv-cache-dsa.h"
+#include "llama-kv-cache-dsv4.h"
 #include "llama-memory-hybrid.h"
 #include "llama-memory-hybrid-iswa.h"
 #include "llama-memory-recurrent.h"
@@ -17,6 +18,7 @@
 #include <cstring>
 #include <numeric>
 #include <sstream>
+#include <string>
 #include <unordered_set>

 // dedup helpers
@@ -568,7 +570,9 @@ void llm_graph_input_attn_kv_iswa::set_input(const llama_ubatch * ubatch) {
    // base tensors may not be allocated if there are no non-SWA attention layers
    if (self_k_idxs && self_k_idxs->buffer) {
        mctx->get_base()->set_input_k_idxs(self_k_idxs, ubatch);
-        mctx->get_base()->set_input_v_idxs(self_v_idxs, ubatch);
+        if (self_v_idxs) {
+            mctx->get_base()->set_input_v_idxs(self_v_idxs, ubatch);
+        }
    }

    // the kq mask guards on its own buffer: shared cells leave idxs unbacked while the mask stays live
@@ -579,7 +583,9 @@ void llm_graph_input_attn_kv_iswa::set_input(const llama_ubatch * ubatch) {
    // swa tensors may not be allocated if there are no SWA attention layers
    if (self_k_idxs_swa && self_k_idxs_swa->buffer) {
        mctx->get_swa()->set_input_k_idxs(self_k_idxs_swa, ubatch);
-        mctx->get_swa()->set_input_v_idxs(self_v_idxs_swa, ubatch);
+        if (self_v_idxs_swa) {
+            mctx->get_swa()->set_input_v_idxs(self_v_idxs_swa, ubatch);
+        }
    }

    if (self_kq_mask_swa && self_kq_mask_swa->buffer) {
@@ -633,6 +639,283 @@ bool llm_graph_input_attn_kv_iswa::can_reuse(const llm_graph_params & params) {
    return res;
 }

+static void dsv4_set_i64(ggml_tensor * dst, const std::vector<int64_t> & src) {
+    if (!dst || !dst->buffer) {
+        return;
+    }
+
+    GGML_ASSERT(dst->ne[0] == (int64_t) src.size());
+    ggml_backend_tensor_set(dst, src.data(), 0, src.size()*ggml_element_size(dst));
+}
+
+static void dsv4_set_i32(ggml_tensor * dst, const std::vector<int32_t> & src) {
+    if (!dst || !dst->buffer) {
+        return;
+    }
+
+    GGML_ASSERT(dst->ne[0] == (int64_t) src.size());
+    ggml_backend_tensor_set(dst, src.data(), 0, src.size()*ggml_element_size(dst));
+}
+
+static void dsv4_set_kq_mask(
+        ggml_tensor * dst,
+        const llama_kv_cache_dsv4_context::comp_plan & plan,
+        uint32_t n_tokens,
+        int64_t n_stream) {
+    if (!dst || !dst->buffer) {
+        return;
+    }
+
+    GGML_ASSERT(dst->type == GGML_TYPE_F32);
+    GGML_ASSERT(n_stream > 0);
+    GGML_ASSERT(n_tokens%n_stream == 0);
+    GGML_ASSERT(dst->ne[0] == plan.n_kv);
+    GGML_ASSERT(dst->ne[1] == (int64_t) n_tokens/n_stream);
+    GGML_ASSERT(dst->ne[2] == 1);
+    GGML_ASSERT(dst->ne[3] == n_stream);
+    GGML_ASSERT((int64_t) plan.n_visible.size() == (int64_t) n_tokens);
+    GGML_ASSERT(ggml_backend_buffer_is_host(dst->buffer));
+
+    float * data = (float *) dst->data;
+
+    for (int64_t i = 0; i < (int64_t) n_tokens; ++i) {
+        const int32_t n_visible = plan.n_visible[i];
+
+        for (int64_t j = 0; j < dst->ne[0]; ++j) {
+            data[i*dst->ne[0] + j] = j < n_visible ? 0.0f : -INFINITY;
+        }
+    }
+}
+
+static ggml_tensor * dsv4_build_raw_kq_mask(
+        ggml_context * ctx,
+        const llama_kv_cache_dsv4_raw_context * mctx,
+        const llama_ubatch & ubatch,
+        const llama_cparams & cparams,
+        int64_t n_stream) {
+    const auto n_kv     = mctx->get_n_kv();
+    const auto n_tokens = ubatch.n_tokens;
+
+    GGML_ASSERT(n_stream > 0);
+    GGML_ASSERT(n_tokens%n_stream == 0);
+
+    const bool use_fattn = cparams.flash_attn && (!cparams.kv_unified || n_stream == 1);
+    const auto type = use_fattn ? GGML_TYPE_F16 : GGML_TYPE_F32;
+
+    ggml_tensor * res = ggml_new_tensor_4d(ctx, type, n_kv, n_tokens/n_stream, 1, n_stream);
+    ggml_set_input(res);
+    ggml_set_name(res, "attn_inp_kq_mask");
+
+    return res;
+}
+
+static bool dsv4_can_reuse_raw_kq_mask(
+        ggml_tensor * kq_mask,
+        const llama_kv_cache_dsv4_raw_context * mctx,
+        const llama_ubatch & ubatch,
+        int64_t n_stream) {
+    const auto n_kv     = mctx->get_n_kv();
+    const auto n_tokens = ubatch.n_tokens;
+
+    GGML_ASSERT(n_stream > 0);
+
+    bool res = true;
+
+    res &= (kq_mask->ne[0] == n_kv);
+    res &= (kq_mask->ne[1] == n_tokens/n_stream);
+    res &= (kq_mask->ne[2] == 1);
+    res &= (kq_mask->ne[3] == n_stream);
+
+    return res;
+}
+
+static std::string dsv4_plan_positions(const std::vector<int32_t> & values) {
+    std::ostringstream ss;
+    ss << "[";
+    for (size_t i = 0; i < values.size(); ++i) {
+        if (i > 0) {
+            ss << ", ";
+        }
+        ss << values[i];
+    }
+    ss << "]";
+    return ss.str();
+}
+
+static bool dsv4_compress_debug() {
+    static const bool debug = []() {
+        const char * env = getenv("LLAMA_DSV4_COMPRESS_DEBUG");
+        return env && atoi(env) > 0;
+    }();
+
+    return debug;
+}
+
+static void dsv4_set_comp_inputs(
+        const llm_graph_input_dsv4::comp_input & inp,
+        const llama_kv_cache_dsv4_context::comp_plan & plan,
+        const char * name,
+        bool debug,
+        uint32_t n_tokens,
+        int64_t n_stream) {
+    dsv4_set_i32(inp.state_pos, plan.state_pos);
+    dsv4_set_i32(inp.state_persist_src_idxs, plan.state_persist_src_idxs);
+    dsv4_set_i32(inp.state_persist_dst_idxs, plan.state_persist_dst_idxs);
+    dsv4_set_i32(inp.state_read_idxs, plan.state_read_idxs);
+    dsv4_set_i64(inp.state_write_idxs, plan.state_write_idxs);
+    dsv4_set_i32(inp.state_write_pos, plan.state_write_pos);
+    dsv4_set_kq_mask(inp.kq_mask, plan, n_tokens, n_stream);
+
+    if (debug || dsv4_compress_debug()) {
+        LLAMA_LOG_INFO("%s: %s n_tokens=%u, n_stream=%d, state_persist_dst=%s, state_write_pos=%s\n",
+                __func__, name, n_tokens, (int) n_stream,
+                dsv4_plan_positions(plan.state_persist_dst_idxs).c_str(),
+                dsv4_plan_positions(plan.state_write_pos).c_str());
+    }
+}
+
+static bool dsv4_can_reuse_tensor_1d(ggml_tensor * t, int64_t ne0) {
+    return (t == nullptr && ne0 == 0) || (t != nullptr && t->ne[0] == ne0);
+}
+
+static bool dsv4_can_reuse_kq_mask(
+        ggml_tensor * t,
+        const llama_kv_cache_dsv4_context::comp_plan & plan,
+        uint32_t n_tokens,
+        int64_t n_stream) {
+    if (plan.n_kv == 0) {
+        return t == nullptr;
+    }
+
+    GGML_ASSERT(n_stream > 0);
+
+    return t != nullptr &&
+           t->ne[0] == plan.n_kv &&
+           t->ne[1] == (int64_t) n_tokens/n_stream &&
+           t->ne[2] == 1 &&
+           t->ne[3] == n_stream;
+}
+
+static bool dsv4_can_reuse_comp_input(
+        const llm_graph_input_dsv4::comp_input & inp,
+        const llama_kv_cache_dsv4_context::comp_plan & plan,
+        uint32_t n_tokens,
+        int64_t n_stream) {
+    bool res = true;
+    res &= dsv4_can_reuse_tensor_1d(inp.state_pos, plan.state_pos.size());
+    res &= dsv4_can_reuse_tensor_1d(inp.state_persist_src_idxs, plan.state_persist_src_idxs.size());
+    res &= dsv4_can_reuse_tensor_1d(inp.state_persist_dst_idxs, plan.state_persist_dst_idxs.size());
+    res &= dsv4_can_reuse_tensor_1d(inp.state_read_idxs, plan.state_read_idxs.size());
+    res &= dsv4_can_reuse_tensor_1d(inp.state_write_idxs, plan.state_write_idxs.size());
+    res &= dsv4_can_reuse_tensor_1d(inp.state_write_pos, plan.state_write_pos.size());
+    res &= dsv4_can_reuse_kq_mask(inp.kq_mask, plan, n_tokens, n_stream);
+
+    return res;
+}
+
+static ggml_tensor * dsv4_build_input_1d(
+        ggml_context * ctx,
+        ggml_type type,
+        int64_t ne0,
+        const std::string & name) {
+    if (ne0 == 0) {
+        return nullptr;
+    }
+
+    ggml_tensor * res = ggml_new_tensor_1d(ctx, type, ne0);
+    ggml_set_input(res);
+    ggml_set_name(res, name.c_str());
+
+    return res;
+}
+
+static void dsv4_build_comp_inputs(
+        ggml_context * ctx,
+        llm_graph_input_dsv4::comp_input & inp,
+        const llama_kv_cache_dsv4_context::comp_plan & plan,
+        const char * name,
+        int64_t n_stream) {
+    inp.state_pos = dsv4_build_input_1d(ctx, GGML_TYPE_I32, plan.state_pos.size(), std::string("dsv4_") + name + "_state_pos");
+    inp.state_persist_src_idxs = dsv4_build_input_1d(ctx, GGML_TYPE_I32, plan.state_persist_src_idxs.size(), std::string("dsv4_") + name + "_state_persist_src_idxs");
+    inp.state_persist_dst_idxs = dsv4_build_input_1d(ctx, GGML_TYPE_I32, plan.state_persist_dst_idxs.size(), std::string("dsv4_") + name + "_state_persist_dst_idxs");
+    inp.state_read_idxs = dsv4_build_input_1d(ctx, GGML_TYPE_I32, plan.state_read_idxs.size(), std::string("dsv4_") + name + "_state_read_idxs");
+    inp.state_write_idxs = dsv4_build_input_1d(ctx, GGML_TYPE_I64, plan.state_write_idxs.size(), std::string("dsv4_") + name + "_state_write_idxs");
+    inp.state_write_pos = dsv4_build_input_1d(ctx, GGML_TYPE_I32, plan.state_write_pos.size(), std::string("dsv4_") + name + "_state_write_pos");
+
+    if (plan.n_kv > 0) {
+        const int64_t n_tokens = (int64_t) plan.n_visible.size();
+
+        GGML_ASSERT(n_stream > 0);
+        GGML_ASSERT(n_tokens%n_stream == 0);
+
+        inp.kq_mask = ggml_new_tensor_4d(ctx, GGML_TYPE_F32, plan.n_kv, n_tokens/n_stream, 1, n_stream);
+        ggml_set_input(inp.kq_mask);
+        ggml_set_name(inp.kq_mask, (std::string("dsv4_") + name + "_kq_mask").c_str());
+    }
+}
+
+void llm_graph_input_dsv4_raw::set_input(const llama_ubatch * ubatch) {
+    if (self_k_idxs && self_k_idxs->buffer) {
+        mctx->set_input_k_idxs(self_k_idxs);
+    }
+
+    if (self_kq_mask && self_kq_mask->buffer) {
+        mctx->set_input_kq_mask(self_kq_mask, ubatch, cparams.causal_attn);
+    }
+
+    if (self_k_rot) {
+        mctx->set_input_k_rot(self_k_rot);
+    }
+}
+
+void llm_graph_input_dsv4::set_input(const llama_ubatch * ubatch) {
+    const auto & plan_csa = mctx->get_csa_plan(*ubatch);
+    const auto & plan_hca = mctx->get_hca_plan(*ubatch);
+    const auto & plan_lid = mctx->get_lid_plan(*ubatch);
+    const int64_t n_stream = plan_csa.n_stream;
+
+    inp_raw->mctx = mctx->get_raw();
+    inp_raw->set_input(ubatch);
+
+    dsv4_set_comp_inputs(inp_csa, plan_csa, "csa", debug > 0, ubatch->n_tokens, n_stream);
+    dsv4_set_comp_inputs(inp_hca, plan_hca, "hca", debug > 0, ubatch->n_tokens, n_stream);
+    dsv4_set_comp_inputs(inp_lid, plan_lid, "lid", debug > 0, ubatch->n_tokens, n_stream);
+
+    if (inp_lid.k_rot && inp_lid.k_rot->buffer) {
+        mctx->get_lid()->set_input_k_rot(inp_lid.k_rot);
+    }
+}
+
+bool llm_graph_input_dsv4::can_reuse(const llm_graph_params & params) {
+    const auto * mctx = static_cast<const llama_kv_cache_dsv4_context *>(params.mctx);
+
+    this->mctx = mctx;
+    inp_raw->mctx = mctx->get_raw();
+
+    bool res = true;
+
+    const auto & plan_csa = mctx->get_csa_plan(params.ubatch);
+    const auto & plan_hca = mctx->get_hca_plan(params.ubatch);
+    const auto & plan_lid = mctx->get_lid_plan(params.ubatch);
+    const int64_t n_stream = plan_csa.n_stream;
+
+    const auto * raw_ctx = mctx->get_raw();
+    inp_raw->mctx = raw_ctx;
+
+    if (inp_raw->self_k_idxs && inp_raw->self_k_idxs->buffer) {
+        res &= inp_raw->self_k_idxs->ne[0] == raw_ctx->get_n_write();
+    }
+    if (inp_raw->self_kq_mask && inp_raw->self_kq_mask->buffer) {
+        res &= dsv4_can_reuse_raw_kq_mask(inp_raw->self_kq_mask, raw_ctx, params.ubatch, n_stream);
+    }
+
+    res &= dsv4_can_reuse_comp_input(inp_csa, plan_csa, params.ubatch.n_tokens, n_stream);
+    res &= dsv4_can_reuse_comp_input(inp_hca, plan_hca, params.ubatch.n_tokens, n_stream);
+    res &= dsv4_can_reuse_comp_input(inp_lid, plan_lid, params.ubatch.n_tokens, n_stream);
+
+    return res;
+}
+
 void llm_graph_input_attn_cross::set_input(const llama_ubatch * ubatch) {
    GGML_ASSERT(cross_kq_mask);

@@ -1351,20 +1634,24 @@ ggml_tensor * llm_graph_context::build_ffn(
    switch (type_op) {
        case LLM_FFN_SILU:
            if (gate && type_gate == LLM_FFN_PAR) {
-                // Step35: HF clamps gate (after SiLU) and up before multiplication
-                if (arch == LLM_ARCH_STEP35 && il >= 0) {
+                if (il >= 0) {
                    const float limit = hparams.swiglu_clamp_shexp[il];
                    constexpr float eps = 1e-6f;
                    if (limit > eps) {
-                        ggml_tensor * gate_act = ggml_silu(ctx0, cur);
-                        cb(gate_act, "ffn_silu", il);
-                        gate_act = ggml_clamp(ctx0, gate_act, -INFINITY, limit);
-                        cb(gate_act, "ffn_silu_clamped", il);
-
                        tmp = ggml_clamp(ctx0, tmp, -limit, limit);
                        cb(tmp, "ffn_up_clamped", il);

-                        cur = ggml_mul(ctx0, gate_act, tmp);
+                        if (arch == LLM_ARCH_DEEPSEEK4) {
+                            cur = ggml_clamp(ctx0, cur, -INFINITY, limit);
+                            cb(cur, "ffn_gate_clamped", il);
+                            cur = ggml_swiglu_split(ctx0, cur, tmp);
+                        } else {
+                            ggml_tensor * gate_act = ggml_silu(ctx0, cur);
+                            cb(gate_act, "ffn_silu", il);
+                            gate_act = ggml_clamp(ctx0, gate_act, -INFINITY, limit);
+                            cb(gate_act, "ffn_silu_clamped", il);
+                            cur = ggml_mul(ctx0, gate_act, tmp);
+                        }
                        cb(cur, "ffn_swiglu_limited", il);
                        type_gate = LLM_FFN_SEQ;
                        break;
@@ -1474,7 +1761,8 @@ ggml_tensor * llm_graph_context::build_moe_ffn(
         ggml_tensor * gate_up_exps,
         ggml_tensor * up_exps_s,
         ggml_tensor * gate_exps_s,
-         ggml_tensor * down_exps_s) const {
+         ggml_tensor * down_exps_s,
+         ggml_tensor * selected_experts_in) const {
    return build_moe_ffn(
        cur,
        gate_inp,  /* gate_inp_b  */ nullptr,
@@ -1494,7 +1782,8 @@ ggml_tensor * llm_graph_context::build_moe_ffn(
        /* gate_up_exps_b */ nullptr,
        up_exps_s,
        gate_exps_s,
-        down_exps_s
+        down_exps_s,
+        selected_experts_in
    );
 }

@@ -1521,7 +1810,8 @@ ggml_tensor * llm_graph_context::build_moe_ffn(
         ggml_tensor * gate_up_exps_b,
         ggml_tensor * up_exps_s,
         ggml_tensor * gate_exps_s,
-         ggml_tensor * down_exps_s) const {
+         ggml_tensor * down_exps_s,
+         ggml_tensor * selected_experts_in) const {
    const int64_t n_embd   = cur->ne[0];
    const int64_t n_tokens = cur->ne[1];
    const bool weight_before_ffn = arch == LLM_ARCH_LLAMA4; // for llama4, we apply the sigmoid-ed weights before the FFN
@@ -1530,6 +1820,9 @@ ggml_tensor * llm_graph_context::build_moe_ffn(

    if (probs_in == nullptr) {
        logits = build_lora_mm(gate_inp, cur); // [n_expert, n_tokens]
+        if (gating_op == LLAMA_EXPERT_GATING_FUNC_TYPE_SQRT_SOFTPLUS) {
+            ggml_mul_mat_set_prec(logits, GGML_PREC_F32);
+        }
        cb(logits, "ffn_moe_logits", il);
    } else {
        logits = probs_in;
@@ -1554,6 +1847,10 @@ ggml_tensor * llm_graph_context::build_moe_ffn(
            {
                probs = logits; // [n_expert, n_tokens]
            } break;
+        case LLAMA_EXPERT_GATING_FUNC_TYPE_SQRT_SOFTPLUS:
+            {
+                probs = ggml_sqrt(ctx0, ggml_softplus(ctx0, logits)); // [n_expert, n_tokens]
+            } break;
        default:
            GGML_ABORT("fatal error");
    }
@@ -1604,8 +1901,11 @@ ggml_tensor * llm_graph_context::build_moe_ffn(
    }

    // select experts
-    ggml_tensor * selected_experts = ggml_argsort_top_k(ctx0, selection_probs, n_expert_used); // [n_expert_used, n_tokens]
-    cb(selected_experts->src[0], "ffn_moe_argsort", il);
+    ggml_tensor * selected_experts = selected_experts_in;
+    if (selected_experts == nullptr) {
+        selected_experts = ggml_argsort_top_k(ctx0, selection_probs, n_expert_used); // [n_expert_used, n_tokens]
+        cb(selected_experts->src[0], "ffn_moe_argsort", il);
+    }
    cb(selected_experts, "ffn_moe_topk", il);

    if (arch == LLM_ARCH_GROVEMOE && n_expert != hparams.n_expert) {
@@ -1718,20 +2018,24 @@ ggml_tensor * llm_graph_context::build_moe_ffn(
    switch (type_op) {
        case LLM_FFN_SILU:
            if (gate_exps) {
-                // Step35: per-layer clamp for routed experts
-                if (arch == LLM_ARCH_STEP35 && il >= 0) {
+                if (il >= 0) {
                    const float limit = hparams.swiglu_clamp_exp[il];
                    constexpr float eps = 1e-6f;
                    if (limit > eps) {
-                        ggml_tensor * gate_act = ggml_silu(ctx0, cur);
-                        cb(gate_act, "ffn_moe_silu", il);
-                        gate_act = ggml_clamp(ctx0, gate_act, -INFINITY, limit);
-                        cb(gate_act, "ffn_moe_silu_clamped", il);
-
                        up = ggml_clamp(ctx0, up, -limit, limit);
                        cb(up, "ffn_moe_up_clamped", il);

-                        cur = ggml_mul(ctx0, gate_act, up);
+                        if (arch == LLM_ARCH_DEEPSEEK4) {
+                            cur = ggml_clamp(ctx0, cur, -INFINITY, limit);
+                            cb(cur, "ffn_moe_gate_clamped", il);
+                            cur = ggml_swiglu_split(ctx0, cur, up);
+                        } else {
+                            ggml_tensor * gate_act = ggml_silu(ctx0, cur);
+                            cb(gate_act, "ffn_moe_silu", il);
+                            gate_act = ggml_clamp(ctx0, gate_act, -INFINITY, limit);
+                            cb(gate_act, "ffn_moe_silu_clamped", il);
+                            cur = ggml_mul(ctx0, gate_act, up);
+                        }
                        cb(cur, "ffn_moe_swiglu_limited", il);
                        break;
                    }
@@ -2760,6 +3064,31 @@ llm_graph_input_attn_kv_iswa * llm_graph_context::build_attn_inp_kv_iswa() const
    return (llm_graph_input_attn_kv_iswa *) res->add_input(std::move(inp));
 }

+llm_graph_input_dsv4 * llm_graph_context::build_inp_dsv4() const {
+    const auto * mctx_cur = static_cast<const llama_kv_cache_dsv4_context *>(mctx);
+    const auto * raw_ctx  = mctx_cur->get_raw();
+
+    auto inp_raw = std::make_unique<llm_graph_input_dsv4_raw>(cparams, raw_ctx);
+
+    const int64_t n_stream = mctx_cur->get_csa_plan(ubatch).n_stream;
+
+    GGML_ASSERT(hparams.swa_type != LLAMA_SWA_TYPE_NONE && "DSV4 expects SWA raw cache");
+
+    inp_raw->self_k_idxs = raw_ctx->build_input_k_idxs(ctx0, ubatch);
+    inp_raw->self_kq_mask = dsv4_build_raw_kq_mask(ctx0, raw_ctx, ubatch, cparams, n_stream);
+    inp_raw->self_kq_mask_cnv = inp_raw->self_kq_mask;
+
+    inp_raw->self_k_rot = raw_ctx->build_input_k_rot(ctx0);
+    auto inp = std::make_unique<llm_graph_input_dsv4>(cparams, std::move(inp_raw), mctx_cur);
+
+    dsv4_build_comp_inputs(ctx0, inp->inp_csa, mctx_cur->get_csa_plan(ubatch), "csa", n_stream);
+    dsv4_build_comp_inputs(ctx0, inp->inp_hca, mctx_cur->get_hca_plan(ubatch), "hca", n_stream);
+    dsv4_build_comp_inputs(ctx0, inp->inp_lid, mctx_cur->get_lid_plan(ubatch), "lid", n_stream);
+    inp->inp_lid.k_rot = mctx_cur->get_lid()->build_input_k_rot(ctx0);
+
+    return (llm_graph_input_dsv4 *) res->add_input(std::move(inp));
+}
+
 ggml_tensor * llm_graph_context::build_rs(
        ggml_tensor * s,
        ggml_tensor * state_copy_main,
@@ -23,6 +23,8 @@ struct llama_memory_context_i;

 class llama_kv_cache_context;
 class llama_kv_cache_dsa_context;
+class llama_kv_cache_dsv4_raw_context;
+class llama_kv_cache_dsv4_context;
 class llama_kv_cache_iswa_context;
 class llama_memory_recurrent_context;
 class llama_memory_hybrid_context;
@@ -459,6 +461,79 @@ public:
    const llama_kv_cache_iswa_context * mctx;
 };

+// DSV4 raw graph inputs are SWA-only, but their mask may be stream-shaped
+// so raw K can be concatenated with DSV4 compressed K in one attention op.
+class llm_graph_input_dsv4_raw {
+public:
+    llm_graph_input_dsv4_raw(
+            const llama_cparams & cparams,
+            const llama_kv_cache_dsv4_raw_context * mctx) :
+        cparams(cparams),
+        mctx(mctx) {
+    }
+
+    void set_input(const llama_ubatch * ubatch);
+
+    ggml_tensor * get_k_idxs() const { return self_k_idxs; }
+    ggml_tensor * get_kq_mask() const { return self_kq_mask_cnv; }
+
+    ggml_tensor * self_k_idxs = nullptr; // I64 [n_batch]
+
+    ggml_tensor * self_kq_mask     = nullptr; // F32/F16 [n_kv, n_batch/n_stream, 1, n_stream]
+    ggml_tensor * self_kq_mask_cnv = nullptr; //         [n_kv, n_batch/n_stream, 1, n_stream]
+
+    ggml_tensor * self_k_rot = nullptr;
+
+    const llama_cparams cparams;
+
+    const llama_kv_cache_dsv4_raw_context * mctx;
+};
+
+class llm_graph_input_dsv4 : public llm_graph_input_i {
+public:
+    struct comp_input {
+        ggml_tensor * state_pos        = nullptr; // I32 [n_state]
+        ggml_tensor * state_persist_src_idxs = nullptr; // I32 [n_state_persist]
+        ggml_tensor * state_persist_dst_idxs = nullptr; // I32 [n_state_persist]
+        ggml_tensor * state_read_idxs  = nullptr; // I32 [ratio*n_state_write]
+        ggml_tensor * state_write_idxs = nullptr; // I64 [n_state_write]
+        ggml_tensor * state_write_pos  = nullptr; // I32 [n_state_write]
+
+        ggml_tensor * kq_mask    = nullptr; // F32 [n_kv, n_batch/n_stream, 1, n_stream]
+
+        ggml_tensor * k_rot      = nullptr;
+    };
+
+    llm_graph_input_dsv4(
+            const llama_cparams & cparams,
+            std::unique_ptr<llm_graph_input_dsv4_raw> inp_raw,
+            const llama_kv_cache_dsv4_context * mctx) :
+        inp_raw(std::move(inp_raw)),
+        cparams(cparams),
+        mctx(mctx) {
+    }
+    ~llm_graph_input_dsv4() = default;
+
+    void set_input(const llama_ubatch * ubatch) override;
+
+    bool can_reuse(const llm_graph_params & params) override;
+
+    llm_graph_input_dsv4_raw * get_raw() const { return inp_raw.get(); }
+    const comp_input & get_csa() const { return inp_csa; }
+    const comp_input & get_hca() const { return inp_hca; }
+    const comp_input & get_lid() const { return inp_lid; }
+
+    std::unique_ptr<llm_graph_input_dsv4_raw> inp_raw;
+
+    comp_input inp_csa;
+    comp_input inp_hca;
+    comp_input inp_lid;
+
+    const llama_cparams cparams;
+
+    const llama_kv_cache_dsv4_context * mctx;
+};
+
 class llm_graph_input_attn_cross : public llm_graph_input_i {
 public:
    llm_graph_input_attn_cross(const llama_cross * cross) : cross(cross) {}
@@ -920,7 +995,8 @@ struct llm_graph_context {
             ggml_tensor * gate_up_exps = nullptr,
             ggml_tensor * up_exps_s = nullptr,
             ggml_tensor * gate_exps_s = nullptr,
-             ggml_tensor * down_exps_s = nullptr) const;
+             ggml_tensor * down_exps_s = nullptr,
+             ggml_tensor * selected_experts_in = nullptr) const;

    ggml_tensor * build_moe_ffn(
             ggml_tensor * cur,
@@ -945,7 +1021,8 @@ struct llm_graph_context {
             ggml_tensor * gate_up_exps_b = nullptr,
             ggml_tensor * up_exps_s = nullptr,
             ggml_tensor * gate_exps_s = nullptr,
-             ggml_tensor * down_exps_s = nullptr) const;
+             ggml_tensor * down_exps_s = nullptr,
+             ggml_tensor * selected_experts_in = nullptr) const;

    //
    // inputs
@@ -1045,6 +1122,8 @@ struct llm_graph_context {

    llm_graph_input_attn_kv_iswa * build_attn_inp_kv_iswa() const;

+    llm_graph_input_dsv4 * build_inp_dsv4() const;
+
    // note: if k_cur or v_cur are not provided, they will not be stored in the memory
    ggml_tensor * build_attn(
            llm_graph_input_attn_kv_iswa * inp,
@@ -14,6 +14,7 @@ enum llama_expert_gating_func_type {
    LLAMA_EXPERT_GATING_FUNC_TYPE_SOFTMAX        = 1,
    LLAMA_EXPERT_GATING_FUNC_TYPE_SIGMOID        = 2,
    LLAMA_EXPERT_GATING_FUNC_TYPE_SOFTMAX_WEIGHT = 3, // applied to the router weights instead of the logits
+    LLAMA_EXPERT_GATING_FUNC_TYPE_SQRT_SOFTPLUS  = 4,
 };

 enum llama_swa_type {
@@ -226,6 +227,16 @@ struct llama_hparams {
    uint32_t indexer_head_size = 0;
    uint32_t indexer_top_k     = 0;

+    // DeepSeek-V4
+    uint32_t dsv4_o_group_count        = 0;
+    uint32_t dsv4_o_lora_rank          = 0;
+    uint32_t dsv4_hc_mult              = 0;
+    uint32_t dsv4_hc_sinkhorn_iters    = 0;
+    uint32_t dsv4_hash_layer_count     = 0;
+    float    dsv4_compress_rope_base   = 0.0f;
+    float    dsv4_hc_eps               = 0.0f;
+    std::array<uint32_t, LLAMA_MAX_LAYERS> dsv4_compress_ratios;
+
    // qwen3vl deepstack
    // When parsed from GGUF, this implies the first N layers consume the first
    // N deepstack embeddings. Use deepstack_mapping_arr if you need a more
@@ -0,0 +1,362 @@
+#pragma once
+
+#include "llama-kv-cache.h"
+#include "llama-kv-cache-iswa.h"
+
+#include <map>
+#include <memory>
+#include <unordered_map>
+#include <vector>
+
+class llama_dsv4_comp_state {
+public:
+    llama_dsv4_comp_state(
+            const llama_model & model,
+            bool            offload,
+            bool            unified,
+            uint32_t        n_seq_max,
+            uint32_t        ratio,
+            uint32_t        state_size,
+            uint32_t        n_embd_state,
+            const char    * name,
+        const llama_memory_i::layer_filter_cb & filter);
+
+    void clear(bool data);
+
+    uint32_t get_ratio()    const;
+    uint32_t get_state_size() const;
+    uint32_t get_n_stream() const;
+
+    std::map<ggml_backend_buffer_type_t, size_t> memory_breakdown() const;
+
+    void state_write(llama_io_write_i & io, llama_seq_id seq_id, llama_state_seq_flags flags) const;
+    void state_read (llama_io_read_i  & io, llama_seq_id seq_id, llama_state_seq_flags flags);
+
+    ggml_tensor * get_kv   (ggml_context * ctx, int32_t il) const;
+    ggml_tensor * get_score(ggml_context * ctx, int32_t il) const;
+
+    ggml_tensor * cpy_kv   (ggml_context * ctx, ggml_tensor * cur, ggml_tensor * idxs, int32_t il) const;
+    ggml_tensor * cpy_score(ggml_context * ctx, ggml_tensor * cur, ggml_tensor * idxs, int32_t il) const;
+
+private:
+    struct layer {
+        uint32_t il;
+
+        ggml_tensor * kv;
+        ggml_tensor * score;
+    };
+
+    const uint32_t ratio;
+    const uint32_t state_size;
+    const uint32_t n_embd_state;
+    const uint32_t n_stream;
+
+    std::vector<std::pair<ggml_context_ptr, ggml_backend_buffer_ptr>> ctxs_bufs;
+
+    std::vector<layer> layers;
+
+    std::unordered_map<int32_t, int32_t> map_layer_ids;
+
+    size_t total_size() const;
+};
+
+//
+// llama_kv_cache_dsv4
+//
+
+// DSV4 uses a normal raw/SWA token cache plus compressed K-only block caches.
+// The compressed caches are storage only; DSV4-specific visibility and block
+// planning are handled by llama_kv_cache_dsv4_context / llm_graph_input_dsv4.
+
+class llama_kv_cache_dsv4 : public llama_memory_i {
+public:
+    llama_kv_cache_dsv4(
+            const llama_model & model,
+                    ggml_type   type_k,
+                    ggml_type   type_v,
+                         bool   v_trans,
+                         bool   offload,
+                         bool   swa_full,
+                         bool   unified,
+                     uint32_t   kv_size,
+                     uint32_t   n_seq_max,
+                     uint32_t   n_ubatch,
+                     uint32_t   n_pad,
+        const layer_filter_cb & filter,
+        const  layer_reuse_cb & reuse);
+
+    ~llama_kv_cache_dsv4() = default;
+
+    //
+    // llama_memory_i
+    //
+
+    llama_memory_context_ptr init_batch(
+            llama_batch_allocr & balloc,
+            uint32_t n_ubatch,
+            bool embd_all) override;
+
+    llama_memory_context_ptr init_full() override;
+
+    llama_memory_context_ptr init_update(llama_context * lctx, bool optimize) override;
+
+    bool get_can_shift() const override;
+
+    void clear(bool data) override;
+
+    bool seq_rm  (llama_seq_id seq_id,                              llama_pos p0, llama_pos p1) override;
+    void seq_cp  (llama_seq_id seq_id_src, llama_seq_id seq_id_dst, llama_pos p0, llama_pos p1) override;
+    void seq_keep(llama_seq_id seq_id)                                                          override;
+    void seq_add (llama_seq_id seq_id,                              llama_pos p0, llama_pos p1, llama_pos shift) override;
+    void seq_div (llama_seq_id seq_id,                              llama_pos p0, llama_pos p1, int d) override;
+
+    llama_pos seq_pos_min(llama_seq_id seq_id) const override;
+    llama_pos seq_pos_max(llama_seq_id seq_id) const override;
+
+    std::map<ggml_backend_buffer_type_t, size_t> memory_breakdown() const override;
+
+    void state_write(llama_io_write_i & io, llama_seq_id seq_id = -1, llama_state_seq_flags flags = 0) const override;
+    void state_read (llama_io_read_i  & io, llama_seq_id seq_id = -1, llama_state_seq_flags flags = 0) override;
+
+    //
+    // llama_kv_cache_dsv4 specific API
+    //
+
+    llama_kv_cache_iswa * get_raw() const;
+    llama_kv_cache      * get_csa() const;
+    llama_kv_cache      * get_hca() const;
+    llama_kv_cache      * get_lid() const;
+    llama_dsv4_comp_state * get_csa_state() const;
+    llama_dsv4_comp_state * get_hca_state() const;
+    llama_dsv4_comp_state * get_lid_state() const;
+
+private:
+    llama_hparams hparams_raw;
+    llama_hparams hparams_csa;
+    llama_hparams hparams_hca;
+    llama_hparams hparams_lid;
+
+    const uint32_t n_seq_max;
+
+    std::unique_ptr<llama_kv_cache_iswa> kv_raw;
+    std::unique_ptr<llama_kv_cache>      kv_csa;
+    std::unique_ptr<llama_kv_cache>      kv_hca;
+    std::unique_ptr<llama_kv_cache>      kv_lid;
+    std::unique_ptr<llama_dsv4_comp_state> csa_state;
+    std::unique_ptr<llama_dsv4_comp_state> hca_state;
+    std::unique_ptr<llama_dsv4_comp_state> lid_state;
+
+    void clear_compressed(bool data);
+};
+
+// DSV4 raw attention only uses the SWA half of kv_raw. The base half is kept
+// for generic ISWA bookkeeping, but it has no DSV4 layers to expose here.
+class llama_kv_cache_dsv4_raw_context : public llama_memory_context_i {
+public:
+    using slot_info_vec_t = llama_kv_cache::slot_info_vec_t;
+
+    llama_kv_cache_dsv4_raw_context(llama_kv_cache_iswa * kv);
+
+    llama_kv_cache_dsv4_raw_context(
+            llama_kv_cache_iswa * kv,
+            llama_context * lctx,
+            bool optimize);
+
+    llama_kv_cache_dsv4_raw_context(
+            llama_kv_cache_iswa * kv,
+            slot_info_vec_t sinfos_base_write,
+            slot_info_vec_t sinfos_swa_write,
+            slot_info_vec_t sinfos_swa_read,
+            std::vector<llama_ubatch> ubatches,
+            std::vector<llama_ubatch> ubatches_write);
+
+    bool next() override;
+    bool apply() override;
+
+    llama_memory_status get_status() const override;
+    const llama_ubatch & get_ubatch() const override;
+
+    uint32_t get_n_kv() const;
+    uint32_t get_n_write() const;
+
+    ggml_tensor * get_k(ggml_context * ctx, int32_t il) const;
+    ggml_tensor * cpy_k(ggml_context * ctx, ggml_tensor * k_cur, ggml_tensor * k_idxs, int32_t il) const;
+
+    ggml_tensor * build_input_k_idxs(ggml_context * ctx, const llama_ubatch & ubatch) const;
+    ggml_tensor * build_input_k_rot(ggml_context * ctx) const;
+
+    void set_input_k_idxs(ggml_tensor * dst) const;
+    void set_input_kq_mask(ggml_tensor * dst, const llama_ubatch * ubatch, bool causal_attn) const;
+    void set_input_k_rot(ggml_tensor * dst) const;
+
+private:
+    size_t i_next = 0;
+
+    llama_kv_cache * kv_swa = nullptr;
+
+    slot_info_vec_t sinfos_write;
+    slot_info_vec_t sinfos_read;
+    std::vector<llama_ubatch> ubatches;
+    std::vector<llama_ubatch> ubatches_write;
+
+    const llama_memory_context_ptr ctx_base_mem;
+    const llama_memory_context_ptr ctx_swa_mem;
+
+    uint32_t n_kv = 0;
+
+    const llama_memory_status status;
+};
+
+// DSV4 compressed KV rows are graph outputs, not normal token KV writes.
+// Keep a small context that exposes K tensors without generic apply() semantics.
+class llama_kv_cache_dsv4_comp_context {
+public:
+    using slot_info_vec_t = llama_kv_cache::slot_info_vec_t;
+
+    llama_kv_cache_dsv4_comp_context(llama_kv_cache * kv);
+
+    llama_kv_cache_dsv4_comp_context(
+            llama_kv_cache * kv,
+            slot_info_vec_t sinfos,
+            std::vector<llama_ubatch> ubatches);
+
+    bool next();
+
+    uint32_t get_n_kv() const;
+
+    ggml_tensor * get_k(ggml_context * ctx, int32_t il) const;
+    ggml_tensor * cpy_k(ggml_context * ctx, ggml_tensor * k_cur, ggml_tensor * k_idxs, int32_t il) const;
+
+    ggml_tensor * build_input_k_rot(ggml_context * ctx) const;
+    void set_input_k_rot(ggml_tensor * dst) const;
+
+private:
+    llama_kv_cache * kv;
+
+    size_t i_cur = 0;
+    slot_info_vec_t sinfos;
+    std::vector<llama_ubatch> ubatches;
+
+    uint32_t n_kv;
+};
+
+class llama_kv_cache_dsv4_context : public llama_memory_context_i {
+public:
+    using slot_info_vec_t = llama_kv_cache::slot_info_vec_t;
+
+    struct comp_plan {
+        // Per-ubatch recipe for updating compressor state, committing completed
+        // compressed rows, and masking the compressed attention source.
+
+        // APE row ids, i.e. pos % ratio, for the compressor-state updates.
+        std::vector<int32_t> state_pos;
+
+        // Current-ubatch source row ids and unique persistent-state
+        // destination row ids for deterministic ring-state updates.
+        std::vector<int32_t> state_persist_src_idxs;
+        std::vector<int32_t> state_persist_dst_idxs;
+
+        // Flattened source row ids used for state-backed commits. Source rows
+        // index the graph-local [persistent_state | current_ubatch_scratch]
+        // tensor. For overlapped compression the first half is previous rows
+        // and the second half is current rows; a final synthetic zero/-inf row
+        // may be addressed for the first block's previous half.
+        std::vector<int32_t> state_read_idxs;
+
+        // Final compressed-cache row ids written by state-backed commits.
+        // A non-boundary CSA/LID decode step can target a masked scratch row.
+        std::vector<int64_t> state_write_idxs;
+
+        // RoPE positions for state-backed commits.
+        std::vector<int32_t> state_write_pos;
+
+        // Number of completed compressed rows visible for each query token.
+        std::vector<int32_t> n_visible;
+
+        // Number of streams used by the attention graph for this ubatch.
+        int64_t n_stream = 1;
+
+        // Graph-width for compressed rows. This can be larger than n_visible
+        // so masked padding rows do not force a new graph at every CSA block.
+        int64_t n_kv = 0;
+    };
+
+    llama_kv_cache_dsv4_context(llama_memory_status status);
+
+    llama_kv_cache_dsv4_context(
+            llama_kv_cache_dsv4 * kv);
+
+    llama_kv_cache_dsv4_context(
+            llama_kv_cache_dsv4 * kv,
+            llama_context * lctx,
+            bool optimize);
+
+    llama_kv_cache_dsv4_context(
+            llama_kv_cache_dsv4 * kv,
+            slot_info_vec_t sinfos_raw_base_write,
+            slot_info_vec_t sinfos_raw_swa_write,
+            slot_info_vec_t sinfos_raw_swa_read,
+            std::vector<llama_ubatch> ubatches,
+            std::vector<llama_ubatch> ubatches_raw);
+
+    virtual ~llama_kv_cache_dsv4_context();
+
+    //
+    // llama_memory_context_i
+    //
+
+    bool next()  override;
+    bool apply() override;
+
+    llama_memory_status  get_status() const override;
+    const llama_ubatch & get_ubatch() const override;
+
+    //
+    // llama_kv_cache_dsv4_context specific API
+    //
+
+    const llama_kv_cache_dsv4_raw_context * get_raw() const;
+    const llama_kv_cache_dsv4_comp_context * get_csa() const;
+    const llama_kv_cache_dsv4_comp_context * get_hca() const;
+    const llama_kv_cache_dsv4_comp_context * get_lid() const;
+    const llama_dsv4_comp_state       * get_csa_state() const;
+    const llama_dsv4_comp_state       * get_hca_state() const;
+    const llama_dsv4_comp_state       * get_lid_state() const;
+
+    const comp_plan & get_csa_plan() const;
+    const comp_plan & get_hca_plan() const;
+    const comp_plan & get_lid_plan() const;
+
+    const comp_plan & get_csa_plan(const llama_ubatch & ubatch) const;
+    const comp_plan & get_hca_plan(const llama_ubatch & ubatch) const;
+    const comp_plan & get_lid_plan(const llama_ubatch & ubatch) const;
+
+private:
+    size_t i_next = 0;
+
+    std::vector<llama_ubatch> ubatches;
+
+    std::vector<comp_plan> plans_csa;
+    std::vector<comp_plan> plans_hca;
+    std::vector<comp_plan> plans_lid;
+
+    const std::unique_ptr<llama_kv_cache_dsv4_raw_context> ctx_raw;
+    const llama_memory_context_ptr ctx_csa_mem;
+    const llama_memory_context_ptr ctx_hca_mem;
+    const llama_memory_context_ptr ctx_lid_mem;
+
+    const std::unique_ptr<llama_kv_cache_dsv4_comp_context> ctx_csa;
+    const std::unique_ptr<llama_kv_cache_dsv4_comp_context> ctx_hca;
+    const std::unique_ptr<llama_kv_cache_dsv4_comp_context> ctx_lid;
+
+    const llama_dsv4_comp_state * csa_state = nullptr;
+    const llama_dsv4_comp_state * hca_state = nullptr;
+    const llama_dsv4_comp_state * lid_state = nullptr;
+
+    bool reserve_plans = false;
+    mutable comp_plan reserve_plan_csa;
+    mutable comp_plan reserve_plan_hca;
+    mutable comp_plan reserve_plan_lid;
+
+    const llama_memory_status status;
+};
@@ -26,7 +26,28 @@ llama_kv_cache_iswa::llama_kv_cache_iswa(
           llama_memory_t   mem_other,
    const layer_filter_cb & filter,
    const  layer_reuse_cb & reuse,
-    const  layer_share_cb & share) : hparams(model.hparams), unified(unified) {
+    const  layer_share_cb & share) :
+    llama_kv_cache_iswa(model, model.hparams, type_k, type_v, v_trans, offload, swa_full, unified,
+            kv_size, n_seq_max, n_ubatch, n_pad, mem_other, filter, reuse, share) {
+}
+
+llama_kv_cache_iswa::llama_kv_cache_iswa(
+        const llama_model & model,
+        const llama_hparams & hparams,
+                ggml_type   type_k,
+                ggml_type   type_v,
+                     bool   v_trans,
+                     bool   offload,
+                     bool   swa_full,
+                     bool   unified,
+                 uint32_t   kv_size,
+                 uint32_t   n_seq_max,
+                 uint32_t   n_ubatch,
+                 uint32_t   n_pad,
+           llama_memory_t   mem_other,
+    const layer_filter_cb & filter,
+    const  layer_reuse_cb & reuse,
+    const  layer_share_cb & share) : unified(unified) {

    // chain filters
    const layer_filter_cb filter_base = [&](int32_t il) {
@@ -30,6 +30,24 @@ public:
        const  layer_reuse_cb & reuse,
        const  layer_share_cb & share);

+    llama_kv_cache_iswa(
+            const llama_model & model,
+            const llama_hparams & hparams,
+                    ggml_type   type_k,
+                    ggml_type   type_v,
+                         bool   v_trans,
+                         bool   offload,
+                         bool   swa_full,
+                         bool   unified,
+                     uint32_t   kv_size,
+                     uint32_t   n_seq_max,
+                     uint32_t   n_ubatch,
+                     uint32_t   n_pad,
+               llama_memory_t   mem_other,
+        const layer_filter_cb & filter,
+        const  layer_reuse_cb & reuse,
+        const  layer_share_cb & share);
+
    ~llama_kv_cache_iswa() = default;

    //
@@ -73,8 +91,6 @@ public:
    llama_kv_cache * get_swa () const;

 private:
-    const llama_hparams & hparams;
-
    const bool unified;

    std::unique_ptr<llama_kv_cache> kv_base;
@@ -211,10 +211,12 @@ llama_kv_cache::llama_kv_cache(
            n_embd_head_k_all = -1;
        }

-        if (n_embd_head_v_all == 0) {
-            n_embd_head_v_all = (int32_t) hparams.n_embd_head_v(il);
-        } else if (n_embd_head_v_all > 0 && n_embd_head_v_all != (int32_t) hparams.n_embd_head_v(il)) {
-            n_embd_head_v_all = -1;
+        if (!is_mla) {
+            if (n_embd_head_v_all == 0) {
+                n_embd_head_v_all = (int32_t) hparams.n_embd_head_v(il);
+            } else if (n_embd_head_v_all > 0 && n_embd_head_v_all != (int32_t) hparams.n_embd_head_v(il)) {
+                n_embd_head_v_all = -1;
+            }
        }

        // [TAG_V_CACHE_VARIABLE]
@@ -336,8 +338,9 @@ llama_kv_cache::llama_kv_cache(
            ggml_is_quantized(type_k) &&
            hparams.n_embd_head_k() % 64 == 0;

-        // always create Hadamard rotation tensors for DeepSeek V3.2 DSA lightning indexer
-        if (model.arch == LLM_ARCH_DEEPSEEK32 && hparams.n_embd_head_k_full == hparams.indexer_head_size) {
+        // always create Hadamard rotation tensors for DeepSeek lightning indexers
+        if ((model.arch == LLM_ARCH_DEEPSEEK32 || model.arch == LLM_ARCH_DEEPSEEK4) &&
+                hparams.n_embd_head_k_full == hparams.indexer_head_size) {
            attn_rot_k = true;
        }

@@ -1220,6 +1223,23 @@ ggml_type llama_kv_cache::type_v() const {
    return layers[0].v->type;
 }

+std::vector<uint32_t> llama_kv_cache::get_layer_ids() const {
+    std::vector<uint32_t> res;
+    res.reserve(layers.size());
+
+    for (const auto & layer : layers) {
+        res.push_back(layer.il);
+    }
+
+    return res;
+}
+
+ggml_tensor * llama_kv_cache::get_k_storage(int32_t il) const {
+    const int32_t ikv = map_layer_ids.at(il);
+
+    return layers[ikv].k;
+}
+
 uint32_t llama_kv_cache::get_n_kv(const slot_info & sinfo) const {
    uint32_t result = 0;

@@ -161,6 +161,9 @@ public:
    ggml_type type_k() const;
    ggml_type type_v() const;

+    std::vector<uint32_t> get_layer_ids() const;
+    ggml_tensor * get_k_storage(int32_t il) const;
+
    //
    // graph_build API
    //
@@ -294,6 +294,8 @@ namespace GGUFMeta {
    }

    template bool llama_model_loader::get_arr_n(enum llm_kv kid, uint32_t & result, bool required);
+    template std::enable_if<std::is_integral<uint32_t>::value, bool>::type
+    llama_model_loader::get_arr_n<uint32_t>(const std::string & key, uint32_t & result, bool required);

    template<typename T>
    bool llama_model_loader::get_arr(const std::string & key, std::vector<T> & result, bool required) {
@@ -395,6 +397,7 @@ namespace GGUFMeta {
    template bool llama_model_loader::get_arr<std::vector<std::string>>(enum llm_kv kid, std::vector<std::string> & result, bool required);
    template bool llama_model_loader::get_arr<std::array<int32_t, 512>>(enum llm_kv kid, std::array<int32_t, 512> & result, bool required);
    template bool llama_model_loader::get_arr<std::vector<int32_t>>(enum llm_kv kid, std::vector<int32_t> & result, bool required);
+    template bool llama_model_loader::get_arr<std::array<uint32_t, LLAMA_MAX_LAYERS>>(enum llm_kv kid, std::array<uint32_t, LLAMA_MAX_LAYERS> & result, bool required);

    template<typename T>
    bool llama_model_loader::get_key(const std::string & key, T & result, bool required) {
@@ -11,6 +11,7 @@
 #include "llama-kv-cache.h"
 #include "llama-kv-cache-iswa.h"
 #include "llama-kv-cache-dsa.h"
+#include "llama-kv-cache-dsv4.h"
 #include "llama-memory-hybrid.h"
 #include "llama-memory-hybrid-iswa.h"
 #include "llama-memory-recurrent.h"
@@ -181,6 +182,8 @@ static llama_model * llama_model_mapping(llm_arch arch, const llama_model_params
            return new llama_model_deepseek2ocr(params);
        case LLM_ARCH_DEEPSEEK32:
            return new llama_model_deepseek32(params);
+        case LLM_ARCH_DEEPSEEK4:
+            return new llama_model_deepseek4(params);
        case LLM_ARCH_GLM_DSA:
            return new llama_model_glm_dsa(params);
        case LLM_ARCH_MISTRAL4:
@@ -817,6 +820,7 @@ static const char * llama_expert_gating_func_name(llama_expert_gating_func_type
    switch (type) {
        case LLAMA_EXPERT_GATING_FUNC_TYPE_SOFTMAX: return "softmax";
        case LLAMA_EXPERT_GATING_FUNC_TYPE_SIGMOID: return "sigmoid";
+        case LLAMA_EXPERT_GATING_FUNC_TYPE_SQRT_SOFTPLUS: return "sqrtsoftplus";
        default:                                    return "unknown";
    }
 }
@@ -2156,7 +2160,24 @@ llama_memory_i * llama_model::create_memory(const llama_memory_params & params,
                        }
                    }

-                    if (hparams.swa_type != LLAMA_SWA_TYPE_NONE) {
+                    if (arch == LLM_ARCH_DEEPSEEK4) {
+                        GGML_ASSERT(hparams.swa_type != LLAMA_SWA_TYPE_NONE);
+
+                        res = new llama_kv_cache_dsv4(
+                                *this,
+                                params.type_k,
+                                params.type_v,
+                                !cparams.flash_attn,
+                                cparams.offload_kqv,
+                                params.swa_full,
+                                cparams.kv_unified,
+                                cparams.n_ctx_seq,
+                                cparams.n_seq_max,
+                                cparams.n_ubatch,
+                                1,
+                                filter,
+                                reuse);
+                    } else if (hparams.swa_type != LLAMA_SWA_TYPE_NONE) {
                        GGML_ASSERT(hparams.is_swa_any());

                        if (arch == LLM_ARCH_GEMMA4_ASSISTANT) {
@@ -2328,6 +2349,11 @@ int32_t llama_model_n_head_kv(const llama_model * model) {
 }

 int32_t llama_model_n_swa(const llama_model * model) {
+    // dsv4 kv-cache has SWA but it cannot be used as a rollback because of
+    // other compression ratios, so we return 0 here
+    if (model->arch == LLM_ARCH_DEEPSEEK4) {
+        return 0;
+    }
    return model->hparams.n_swa;
 }

@@ -2409,6 +2435,7 @@ llama_rope_type llama_model_rope_type(const llama_model * model) {
        case LLM_ARCH_DEEPSEEK2:
        case LLM_ARCH_DEEPSEEK2OCR:
        case LLM_ARCH_DEEPSEEK32:
+        case LLM_ARCH_DEEPSEEK4:
        case LLM_ARCH_PLM:
        case LLM_ARCH_CHATGLM:
        case LLM_ARCH_GRANITE:
@@ -255,9 +255,11 @@ struct llama_layer {
    struct ggml_tensor * wq_b      = nullptr;
    struct ggml_tensor * wkv_a_mqa = nullptr;
    struct ggml_tensor * wkv_b     = nullptr;
+    struct ggml_tensor * wkv       = nullptr;
    struct ggml_tensor * wk_b      = nullptr;
    struct ggml_tensor * wv_b      = nullptr;
    struct ggml_tensor * wqkv_b    = nullptr;
+    struct ggml_tensor * wo_a      = nullptr;
    struct ggml_tensor * wo_b      = nullptr;
    struct ggml_tensor * wq_cross  = nullptr;
    struct ggml_tensor * wk_cross  = nullptr;
@@ -333,6 +335,7 @@ struct llama_layer {
    struct ggml_tensor * ffn_up_b   = nullptr; // b3
    struct ggml_tensor * ffn_act    = nullptr;
    struct ggml_tensor * ffn_exp_probs_b = nullptr;
+    struct ggml_tensor * ffn_gate_tid2eid = nullptr;

    // mamba proj
    struct ggml_tensor * ssm_in  = nullptr;
@@ -463,6 +466,23 @@ struct llama_layer {
    // openai-moe
    struct ggml_tensor * attn_sinks = nullptr;

+    // DeepSeek-V4
+    struct ggml_tensor * attn_kv_norm = nullptr;
+    struct ggml_tensor * hc_attn_fn   = nullptr;
+    struct ggml_tensor * hc_attn_base = nullptr;
+    struct ggml_tensor * hc_attn_scale = nullptr;
+    struct ggml_tensor * hc_ffn_fn    = nullptr;
+    struct ggml_tensor * hc_ffn_base  = nullptr;
+    struct ggml_tensor * hc_ffn_scale = nullptr;
+    struct ggml_tensor * attn_comp_wkv   = nullptr;
+    struct ggml_tensor * attn_comp_wgate = nullptr;
+    struct ggml_tensor * attn_comp_ape   = nullptr;
+    struct ggml_tensor * attn_comp_norm  = nullptr;
+    struct ggml_tensor * indexer_comp_wkv   = nullptr;
+    struct ggml_tensor * indexer_comp_wgate = nullptr;
+    struct ggml_tensor * indexer_comp_ape   = nullptr;
+    struct ggml_tensor * indexer_comp_norm  = nullptr;
+
    // cogvlm
    struct ggml_tensor * visexp_attn_wqkv = nullptr;
    struct ggml_tensor * visexp_attn_wo   = nullptr;
@@ -553,6 +573,11 @@ struct llama_model {
    struct ggml_tensor * nextn_proj_pre  = nullptr;
    struct ggml_tensor * nextn_proj_post = nullptr;

+    // DeepSeek-V4
+    struct ggml_tensor * hc_head_fn    = nullptr;
+    struct ggml_tensor * hc_head_base  = nullptr;
+    struct ggml_tensor * hc_head_scale = nullptr;
+
    // classifier
    struct ggml_tensor * cls       = nullptr;
    struct ggml_tensor * cls_b     = nullptr;
@@ -1085,6 +1085,121 @@ struct llama_model_deepseek32 : public llama_model_base {
 };


+struct llama_model_deepseek4 : public llama_model_base {
+    llama_model_deepseek4(const struct llama_model_params & params) : llama_model_base(params) {}
+    void load_arch_hparams(llama_model_loader & ml) override;
+    void load_arch_tensors(llama_model_loader & ml) override;
+
+    struct graph : public llm_graph_context {
+        graph(const llama_model & model, const llm_graph_params & params);
+
+        ggml_tensor * build_hc_pre(
+                ggml_tensor * x,
+                ggml_tensor * hc_fn,
+                ggml_tensor * hc_scale,
+                ggml_tensor * hc_base,
+                ggml_tensor ** post,
+                ggml_tensor ** comb,
+                int il) const;
+
+        ggml_tensor * build_hc_post(
+                ggml_tensor * x,
+                ggml_tensor * residual,
+                ggml_tensor * post,
+                ggml_tensor * comb,
+                int il) const;
+
+        ggml_tensor * build_hc_head(
+                ggml_tensor * x,
+                ggml_tensor * hc_fn,
+                ggml_tensor * hc_scale,
+                ggml_tensor * hc_base) const;
+
+        ggml_tensor * build_attention(
+                const llama_model & model,
+                llm_graph_input_dsv4 * inp_dsv4,
+                ggml_tensor * cur,
+                ggml_tensor * inp_pos,
+                int il) const;
+
+        ggml_tensor * build_hca_compressed_kv_from_state(
+                ggml_tensor * kv_state,
+                ggml_tensor * score_state,
+                ggml_tensor * state_read_idxs,
+                ggml_tensor * comp_pos,
+                ggml_tensor * norm,
+                int64_t n_embd_head,
+                const char * name,
+                int il) const;
+
+        ggml_tensor * build_overlap_compressed_kv_from_state(
+                ggml_tensor * kv_state,
+                ggml_tensor * score_state,
+                ggml_tensor * state_read_idxs,
+                ggml_tensor * comp_pos,
+                ggml_tensor * norm,
+                int64_t ratio,
+                int64_t n_embd_head,
+                const char * name,
+                int il) const;
+
+        ggml_tensor * build_lid_top_k(
+                const llama_model & model,
+                llm_graph_input_dsv4 * inp_dsv4,
+                ggml_tensor * qr,
+                ggml_tensor * cur,
+                ggml_tensor * inp_pos,
+                int il) const;
+
+        ggml_tensor * build_top_k_mask(
+                ggml_tensor * kq_mask,
+                ggml_tensor * top_k,
+                const char * name,
+                int il) const;
+
+        ggml_tensor * build_csa_lid_attention(
+                const llama_model & model,
+                llm_graph_input_dsv4 * inp_dsv4,
+                llm_graph_input_dsv4_raw * inp_attn,
+                ggml_tensor * q,
+                ggml_tensor * kv,
+                ggml_tensor * qr,
+                ggml_tensor * cur,
+                ggml_tensor * inp_pos,
+                ggml_tensor * sinks,
+                float kq_scale,
+                int il) const;
+
+        ggml_tensor * build_hca_attention(
+                llm_graph_input_dsv4 * inp_dsv4,
+                llm_graph_input_dsv4_raw * inp_attn,
+                ggml_tensor * q,
+                ggml_tensor * kv,
+                ggml_tensor * sinks,
+                float kq_scale,
+                int il) const;
+
+        ggml_tensor * build_raw_attention(
+                llm_graph_input_dsv4_raw * inp_attn,
+                ggml_tensor * q,
+                ggml_tensor * kv,
+                ggml_tensor * sinks,
+                float kq_scale,
+                int il) const;
+
+        ggml_tensor * build_hc_weighted_sum(
+                ggml_tensor * x,
+                ggml_tensor * weights) const;
+
+        ggml_tensor * build_hc_sinkhorn(
+                ggml_tensor * comb,
+                int il) const;
+    };
+
+    std::unique_ptr<llm_graph_context> build_arch_graph(const llm_graph_params & params) const override;
+};
+
+
 struct llama_model_deepseek2ocr : public llama_model_base {
    llama_model_deepseek2ocr(const struct llama_model_params & params) : llama_model_base(params) {}
    void load_arch_hparams(llama_model_loader & ml) override;
@@ -412,6 +412,9 @@ static bool arch_supported(const llm_arch arch) {
    if (arch == LLM_ARCH_DEEPSEEK2OCR) {
        return false;
    }
+    if (arch == LLM_ARCH_DEEPSEEK4) {
+        return false;
+    }

    // FIXME some models are segfaulting with WebGPU:
 #ifdef GGML_USE_WEBGPU
@@ -8,6 +8,7 @@ set(UI_SOURCE_GLOBS
 set(UI_SOURCE_FILES
    package.json
    package-lock.json
+    src/.gitignore
    vite.config.ts
    svelte.config.js
    tsconfig.json
@@ -0,0 +1 @@
+!*