diff --git a/src/anemoi/registry/tasks.py b/src/anemoi/registry/tasks.py
index 4a9b9da..9ce0567 100644
--- a/src/anemoi/registry/tasks.py
+++ b/src/anemoi/registry/tasks.py
@@ -45,6 +45,9 @@ def __iter__(self):
     def __getitem__(self, key):
         return list(self)[key]
 
+    def __len__(self):
+        return len(self.get())
+
     def add_new_task(self, **kwargs):
         kwargs = kwargs.copy()
         assert "action" in kwargs, kwargs