Update app.py

app.py

@@ -27,7 +27,7 @@ def query_openai(messages, temperature, top_p, max_output_tokens):
         max_output_tokens = int(max_output_tokens) if max_output_tokens else 2048
 
         response = openai.ChatCompletion.create(
-            model="gpt-4.5-preview",
+            model="gpt-4.1",
             messages=messages,
             temperature=temperature,
             top_p=top_p,