diff --git a/litellm/utils.py b/litellm/utils.py
index 8eb7181711..a75130a31e 100644
--- a/litellm/utils.py
+++ b/litellm/utils.py
@@ -4867,7 +4867,7 @@ def _is_potential_model_name_in_model_cost(
     Check if the potential model name is in the model cost (case-insensitive).
     """
     return any(
-        _get_model_cost_key(potential_model_name) is not None
+        _get_model_cost_key(str(potential_model_name)) is not None
         for potential_model_name in potential_model_names.values()
     )