Update llm_node.py

llm_node.py

@@ -2,6 +2,13 @@ from langchain_community.chat_models import ChatOpenAI
 
 def llm_node(question):
     llm = ChatOpenAI(model="gpt-3.5-turbo", temperature=0)
-    prompt = f"Answer this carefully and exactly:\n{question}"
+    prompt = f"""You are solving a GAIA benchmark question.
+ONLY return the direct, final answer.
+Do NOT include any explanation or prefix.
+Here’s the question:
+
+{question}
+
+Your answer:"""
     response = llm.invoke(prompt)
     return response.content.strip()