diff --git a/nanobot/agent/loop.py b/nanobot/agent/loop.py
index 6cecd46..0edc619 100644
--- a/nanobot/agent/loop.py
+++ b/nanobot/agent/loop.py
@@ -426,6 +426,7 @@ Respond with ONLY valid JSON, no markdown fences."""
                 ],
                 model="claude-haiku-4-5",
                 thinking_budget=0,
+                max_tokens=16384,
             )
             text = (response.content or "").strip()
             if text.startswith("```"):