Update app.py

app.py

@@ -89,7 +89,8 @@ with gr.Blocks(css=css) as demo:
         result = gr.Image(label="Result", show_label=False)
 
         with gr.Accordion("Advanced Settings", open=False):
-            model_repo_id = gr.Dropdown(available_models, 
+            model_repo_id = gr.Dropdown(available_models,
+                                        value=available_models[0],
                                         multiselect=False,
                                         label="Model",
                                         info="Choose models for generation")