Update app.py

app.py

@@ -71,7 +71,7 @@ if authentication_status:
         if st.button("Submit"):
             if api_input:
                 os.environ["OPENAI_API_KEY"] = api_input
-                chat_mdl = ChatOpenAI(model_name = 'gpt-3.5-turbo-16k', temperature=0.1)
+                chat_mdl = ChatOpenAI(model_name = 'gpt-4', temperature=0.1)
     
             if chat_mdl is not None:
                 if user_data is None: