Update app.py

app.py

@@ -60,7 +60,7 @@ def predict(message, history):
     history_openai_format.append({"role": "user", "content": prep})
 
     response = openai.ChatCompletion.create(
-        model='gpt-3.5-turbo',
+        model='gpt-4',
         messages= history_openai_format,         
         temperature=1.0,
         stream=True