diff --git a/litellm/litellm_core_utils/model_param_helper.py b/litellm/litellm_core_utils/model_param_helper.py
index 91f2f1341cf..4d45c47c224 100644
--- a/litellm/litellm_core_utils/model_param_helper.py
+++ b/litellm/litellm_core_utils/model_param_helper.py
@@ -17,15 +17,16 @@ from litellm.types.rerank import RerankRequest
 
 
 class ModelParamHelper:
+    # Cached at class level — deterministic set built from static OpenAI type annotations
+    _relevant_logging_args: frozenset = frozenset()
+
     @staticmethod
     def get_standard_logging_model_parameters(
         model_parameters: dict,
     ) -> dict:
         """ """
         standard_logging_model_parameters: dict = {}
-        supported_model_parameters = (
-            ModelParamHelper._get_relevant_args_to_use_for_logging()
-        )
+        supported_model_parameters = ModelParamHelper._relevant_logging_args
 
         for key, value in model_parameters.items():
             if key in supported_model_parameters:
@@ -172,3 +173,8 @@ class ModelParamHelper:
         Get the kwargs to exclude from the cache key
         """
         return set(["metadata"])
+
+
+ModelParamHelper._relevant_logging_args = frozenset(
+    ModelParamHelper._get_relevant_args_to_use_for_logging()
+)