Update app.py

app.py

@@ -962,7 +962,7 @@ with gr.Blocks(
                     label="AI Provider API Key (Override)", type="password", placeholder="Uses .env if blank"
                 )
                 available_providers = get_available_providers()
-                default_provider = available_providers[0] if available_providers else None
+                default_provider = available_providers[3] if available_providers else None
                 prov_sel_dd = gr.Dropdown(
                     label="AI Provider", choices=available_providers,
                     value=default_provider, interactive=True