Update app.py

app.py

@@ -664,7 +664,7 @@ def build_ui():
                             )
                             model_box = gr.Dropdown(
                                 label="Model",
-                                choices=["gpt-5", "gpt-4.1", "gpt-4o"],
+                                choices=["gpt-5", "gpt-5-mini", "gpt-5-nano"],
                                 value="gpt-5",
                             )
                         with gr.Row():