Update app.py

app.py

@@ -58,7 +58,7 @@ def respond(message, history: list[tuple[str, str]], system_message, max_tokens,
 
     # Llamar a la API de OpenAI con streaming
     stream = client.chat.completions.create(
-        model="gpt-4o",
+        model="gpt-4o-mini",
         messages=messages,
         max_tokens=max_tokens,
         stream=True,