Update app.py

app.py

@@ -36,7 +36,7 @@ class BasicAgent:
         if not api_key:
             raise ValueError("OPENAI_API_KEY not set in environment variables!")
         model = LiteLLMModel(
-            model_id="gpt-4o",
+            model_id="gpt-4.1-nano (long context)",
             api_key=api_key
         )