diff --git a/src/routers/deep_agent_chat.py b/src/routers/deep_agent_chat.py
index 1f84054..99b54a5 100755
--- a/src/routers/deep_agent_chat.py
+++ b/src/routers/deep_agent_chat.py
@@ -258,7 +258,6 @@ async def chat_stream(request: DeepAgentChatRequest):
                     model_messages = update_model_messages.get("messages", [])
                     for model_token in model_messages:
                         if isinstance(model_token, AIMessage):
-                            model_content_blocks = model_token.content_blocks[0]
                             model_name = model_token.name
                             payload_out.update({
                                 "node": model_name if model_name else "main",