diff --git a/litellm/tests/test_utils.py b/litellm/tests/test_utils.py
index 9f2e99a805..491283eeda 100644
--- a/litellm/tests/test_utils.py
+++ b/litellm/tests/test_utils.py
@@ -390,4 +390,8 @@ def test_get_max_token_unit_test():
 
 
 def test_get_supported_openai_params() -> None:
+    # Mapped provider
     assert isinstance(get_supported_openai_params("gpt-4"), list)
+
+    # Unmapped provider
+    assert get_supported_openai_params("nonexistent") is None
diff --git a/litellm/utils.py b/litellm/utils.py
index 3ad7ea312e..3595ca0bd1 100644
--- a/litellm/utils.py
+++ b/litellm/utils.py
@@ -6242,7 +6242,10 @@ def get_supported_openai_params(
     - None if unmapped
     """
     if not custom_llm_provider:
-        custom_llm_provider = litellm.get_llm_provider(model=model)[1]
+        try:
+            custom_llm_provider = litellm.get_llm_provider(model=model)[1]
+        except BadRequestError:
+            return None
     if custom_llm_provider == "bedrock":
         return litellm.AmazonConverseConfig().get_supported_openai_params(model=model)
     elif custom_llm_provider == "ollama":