Update app.py

app.py

@@ -359,7 +359,7 @@ def create_interface():
                             "claude-3-5-sonnet-20241022",
                             "claude-3-opus-20240229",
                         ],
-                        value="o1-mini",
+                        value="gpt-4o-mini",
                     )
 
                 generate_btn = gr.Button("Generate Charts", variant="primary", size="lg")