Update app.py

app.py

@@ -57,7 +57,7 @@ def respond(message, history: list[tuple[str, str]], system_message, max_tokens,
     messages.append({"role": "user", "content": message})
 
     # Llamar a la API de OpenAI con streaming
-    stream = client.chat.completions.create(
+    stream = client.responses.create(
         model="gpt-5-nano",
         messages=messages,
         #max_tokens=max_tokens,