Update app.py

app.py

@@ -99,7 +99,7 @@ def get_chat_response(query: str, knowledge_base: dict) -> str:
         
         # Generate response using the new API
         response = openai.ChatCompletion.create(
-            model="gpt-4",
+            model="gpt-3.5-turbo",
             messages=[
                 {"role": "system", "content": "You are Manyue's AI assistant. Answer questions about Manyue."},
                 {"role": "user", "content": query},