Update app.py

app.py

@@ -34,7 +34,7 @@ async def on_chat_start():
     
     # create a chat model / LLM
     chat_model = ChatOpenAI(
-        model="gpt-4o-2024-05-13", temperature=0, api_key=openai_api_key
+        model="gpt-3.5-turbo", temperature=0, api_key=openai_api_key
     )
     
     # create a parser to parse the output of our LLM