Update agent.py

agent.py

@@ -116,7 +116,9 @@ class LangGraphAgent:
             
         print(f"Running LangGraphAgent with input: {question[:200]}...")
         result = gaia_agent.invoke(input_state, {"recursion_limit": 30})  # prevents infinite looping when the LLM keeps calling tools over and over
-        final_response = result["messages"][-1].content
+        content_list = result["messages"][-1]["content"]   # extract content list from the last message
+        texts = [obj["text"] for obj in content_objs if obj.get("type") == "text"]  # pull out all text fragments (required for gpt-4o-mini)
+        final_response = "\n".join(texts).strip() 
         
         try:
             return final_response.split("FINAL ANSWER:")[-1].strip()  #  parse out only what's after "FINAL ANSWER:"