Update app.py

app.py

@@ -35,7 +35,7 @@ def get_text_response(user_message, chat_history):
 def translate_text(text):
     prompt = f"Translate the following text to Vietnamese: {text}"
     response = openai.Completion.create(
-        engine="gpt-4o-mini",
+        engine="gpt-4",
         prompt=prompt,
         max_tokens=150
     )