Update app.py

app.py

@@ -77,7 +77,7 @@ def generate_response(user_query, relevant_segment):
         messages.append({"role": "user", "content": user_message})
         
         response = openai.ChatCompletion.create(
-            model="gpt-4o",
+            model="gpt-4",
             messages=messages,
             max_tokens=4000,
             temperature=0.5,