diff --git a/litellm/responses/litellm_completion_transformation/transformation.py b/litellm/responses/litellm_completion_transformation/transformation.py
index 8052f69f22b..217ed711d37 100644
--- a/litellm/responses/litellm_completion_transformation/transformation.py
+++ b/litellm/responses/litellm_completion_transformation/transformation.py
@@ -1190,7 +1190,9 @@ class LiteLLMCompletionResponsesConfig:
             "detail",
         ]:
             if hasattr(item, attr):
-                item_dict[attr] = getattr(item, attr)
+                val = getattr(item, attr)
+                if val is not None:
+                    item_dict[attr] = val
         return item_dict
 
     @staticmethod
diff --git a/litellm/utils.py b/litellm/utils.py
index 3fdf0a5eee6..d1c7af7050d 100644
--- a/litellm/utils.py
+++ b/litellm/utils.py
@@ -7210,9 +7210,7 @@ def is_cached_message(message: AllMessageValues) -> bool:
 
     # Check message-level cache_control (set by cache_control_injection_points hook for string content)
     message_level_cache_control = (
-        message.get("cache_control")
-        if isinstance(message, dict)
-        else getattr(message, "cache_control", None)
+        message.get("cache_control") if isinstance(message, dict) else getattr(message, "cache_control", None)
     )
     if message_level_cache_control is not None:
         cc_type = (
@@ -7243,14 +7241,9 @@ def is_cached_message(message: AllMessageValues) -> bool:
             cache_control = getattr(content_item, "cache_control", None)
             item_type = getattr(content_item, "type", None)
 
-        if (
-            item_type == "text"
-            and cache_control is not None
-        ):
+        if item_type == "text" and cache_control is not None:
             cc_type = (
-                cache_control.get("type")
-                if isinstance(cache_control, dict)
-                else getattr(cache_control, "type", None)
+                cache_control.get("type") if isinstance(cache_control, dict) else getattr(cache_control, "type", None)
             )
             if cc_type == "ephemeral":
                 return True
diff --git a/tests/test_litellm/responses/litellm_completion_transformation/test_litellm_completion_responses.py b/tests/test_litellm/responses/litellm_completion_transformation/test_litellm_completion_responses.py
index 4b07d638261..537753ec3e1 100644
--- a/tests/test_litellm/responses/litellm_completion_transformation/test_litellm_completion_responses.py
+++ b/tests/test_litellm/responses/litellm_completion_transformation/test_litellm_completion_responses.py
@@ -2663,15 +2663,22 @@ class TestCacheControlPreservation:
             def dict(self):
                 return {"type": self.type, "text": self.text, "cache_control": self.cache_control}
 
-        content = [MockContentBlock(), MockPydanticV2Block(), MockPydanticV1Block()]
+        class MockBlockWithNoneCacheControl:
+            def __init__(self):
+                self.type = "text"
+                self.text = "hello none"
+                self.cache_control = None
+
+        content = [MockContentBlock(), MockPydanticV2Block(), MockPydanticV1Block(), MockBlockWithNoneCacheControl()]
         result = LiteLLMCompletionResponsesConfig._transform_responses_api_content_to_chat_completion_content(content)
         assert isinstance(result, list)
-        assert len(result) == 3
+        assert len(result) == 4
         assert result[0]["cache_control"] == {"type": "ephemeral"}
         assert result[1]["cache_control"] == {"type": "ephemeral"}
         assert result[2]["cache_control"] == {"type": "ephemeral"}
         assert result[1]["text"] == "hello v2"
         assert result[2]["text"] == "hello v1"
+        assert "cache_control" not in result[3]
 
     def test_is_cached_message_for_object_message_and_content_item(self):
         """Test is_cached_message on custom objects / models."""