diff --git a/litellm/router_utils/batch_utils.py b/litellm/router_utils/batch_utils.py
index 6c5d80afc1ba..195e704773d8 100644
--- a/litellm/router_utils/batch_utils.py
+++ b/litellm/router_utils/batch_utils.py
@@ -5,9 +5,21 @@
 
 from litellm.types.llms.openai import FileTypes, OpenAIFilesPurpose
 
+_ROUTER_METHODS_USING_LITELLM_METADATA = frozenset(
+    [
+        "batch",
+        "generic_api_call",
+        "_acreate_batch",
+        "file",
+        "_ageneric_api_call_with_fallbacks",
+    ]
+)
+
 
 class InMemoryFile(io.BytesIO):
-    def __init__(self, content: bytes, name: str, content_type: str = "application/jsonl"):
+    def __init__(
+        self, content: bytes, name: str, content_type: str = "application/jsonl"
+    ):
         super().__init__(content)
         self.name = name
         self.content_type = content_type
@@ -79,12 +91,8 @@ def _get_router_metadata_variable_name(function_name: Optional[str]) -> str:
 
     For ALL other endpoints we call this "metadata
     """
-    ROUTER_METHODS_USING_LITELLM_METADATA = set(
-        ["batch", "generic_api_call", "_acreate_batch", "file", "_ageneric_api_call_with_fallbacks"]
-    )
-    if function_name and any(
-        method in function_name for method in ROUTER_METHODS_USING_LITELLM_METADATA
-    ):
-        return "litellm_metadata"
-    else:
-        return "metadata"
+    if function_name:
+        for method in _ROUTER_METHODS_USING_LITELLM_METADATA:
+            if method in function_name:
+                return "litellm_metadata"
+    return "metadata"