diff --git a/litellm/llms/base_llm/responses/transformation.py b/litellm/llms/base_llm/responses/transformation.py
index 53a7a21290..8e0a1f5285 100644
--- a/litellm/llms/base_llm/responses/transformation.py
+++ b/litellm/llms/base_llm/responses/transformation.py
@@ -97,7 +97,7 @@ class BaseResponsesAPIConfig(ABC):
         response_api_optional_request_params: Dict,
         litellm_params: GenericLiteLLMParams,
         headers: dict,
-    ) -> ResponsesAPIRequestParams:
+    ) -> Dict:
         pass
 
     @abstractmethod
diff --git a/litellm/llms/openai/responses/transformation.py b/litellm/llms/openai/responses/transformation.py
index 891b8849db..e062c0c9fa 100644
--- a/litellm/llms/openai/responses/transformation.py
+++ b/litellm/llms/openai/responses/transformation.py
@@ -65,10 +65,12 @@ class OpenAIResponsesAPIConfig(BaseResponsesAPIConfig):
         response_api_optional_request_params: Dict,
         litellm_params: GenericLiteLLMParams,
         headers: dict,
-    ) -> ResponsesAPIRequestParams:
+    ) -> Dict:
         """No transform applied since inputs are in OpenAI spec already"""
-        return ResponsesAPIRequestParams(
-            model=model, input=input, **response_api_optional_request_params
+        return dict(
+            ResponsesAPIRequestParams(
+                model=model, input=input, **response_api_optional_request_params
+            )
         )
 
     def transform_response_api_response(