Update app.py

app.py

@@ -222,13 +222,16 @@ with gr.Blocks(css=css, head=head) as demo:
             btn = gr.Button("Run", variant="primary")
         with gr.Column():
             with gr.Accordion("parameters", open=False):
-                ckpt_value = os.path.join('SD1.5', 'realisticVisionV60B1_v51VAE.safetensors')
+
                 ckpt_name = gr.Dropdown(
-                    label="Base Model (fixed for demo)",
-                    choices=[ckpt_value],
-                    value=ckpt_value,
-                    interactive=False
+                label="Base Model Name",
+                choices=folder_paths.get_filename_list("checkpoints"),
+                value='SD1.5/realisticVisionV60B1_v51VAE.safetensors',
+                interactive=True
                 )
+
+
+                
                 negative_prompt = gr.Textbox(
                     label="Negative Prompt",
                     value="",