change default sorting

app.py

@@ -22,6 +22,14 @@ def get_leaderboard():
     if len(full_df) == 0:
         return pd.DataFrame({'date':[], 'model':[], 'score':[], 'verified':[]})
 
+    # Add computed column for MSUN+SUN
+    if 'msun_count' in full_df.columns and 'sun_count' in full_df.columns:
+        full_df['msun_plus_sun'] = full_df['msun_count'] + full_df['sun_count']
+
+    # Sort by MSUN+SUN in descending order by default
+    if 'msun_plus_sun' in full_df.columns:
+        full_df = full_df.sort_values(by='msun_plus_sun', ascending=False)
+
     return full_df
 
 def format_dataframe(df, show_percentage=False, selected_groups=None, compact_view=True):
@@ -281,11 +289,12 @@ Generative machine learning models hold great promise for accelerating materials
                     with gr.Column(scale=1):
                         # Create choices with display names, but values are the raw column names
                         sort_choices = ["None"] + [COLUMN_DISPLAY_NAMES.get(col, col) for col in COLUMN_DISPLAY_NAMES.keys()]
+                        # Note: The initial sort is already applied in get_leaderboard() by MSUN+SUN
                         sort_by = gr.Dropdown(
                             choices=sort_choices,
                             value="None",
                             label="Sort By",
-                            info="Select column to sort by"
+                            info="Select column to sort by (default: sorted by MSUN+SUN descending)"
                         )
                         sort_direction = gr.Radio(
                             choices=["Ascending", "Descending"],