Update ShrewdAgent.py

ShrewdAgent.py

@@ -82,7 +82,7 @@ class ShrewdAgent:
     
         print("Binding tools to LLM...")
         self.llm = ChatOpenAI(
-            model="gpt-4.1",
+            model="gpt-4o",
             temperature=0,
             api_key=SecretStr(os.environ['OPENAI_API_KEY'])
         ).bind_tools(self.tools)
@@ -121,7 +121,7 @@ class ShrewdAgent:
             logger.error(f"GraphRecursionError: {e}")
 
         final_answer = "I couldn't find the answer"
-        if accumulated_response[-1].get("assistant"):
+        if accumulated_response and accumulated_response[-1].get("assistant"):
             final_answer = accumulated_response[-1]["assistant"]['messages'][-1].content
         logger.info(f"Agent returning answer: {final_answer}")
         return final_answer