Update app.py

app.py

@@ -61,7 +61,7 @@ class GAIAAgent:
     def __init__(self):
         hf_token = os.environ.get("HF_TOKEN")
         model_id = os.environ.get("GAIA_MODEL_ID")  # optional override
-        provider = os.environ.get("GAIA_PROVIDER", "hf-inference")  # optional override
+        provider = os.environ.get("GAIA_PROVIDER")  # optional override; unset = library default ("auto")
 
         # Fail fast and loud instead of letting all 20 questions die silently
         # at Step 1 with a generic "api_key" error from deep inside smolagents.
@@ -74,7 +74,9 @@ class GAIAAgent:
                 "not always hot-reload a running container)."
             )
 
-        model_kwargs = {"token": hf_token, "provider": provider}
+        model_kwargs = {"token": hf_token}
+        if provider:
+            model_kwargs["provider"] = provider
         if model_id:
             model_kwargs["model_id"] = model_id
         model = InferenceClientModel(**model_kwargs)