diff --git a/litellm/llms/openai/responses/guardrail_translation/handler.py b/litellm/llms/openai/responses/guardrail_translation/handler.py
index 7a82ae9b0be..16751d0716c 100644
--- a/litellm/llms/openai/responses/guardrail_translation/handler.py
+++ b/litellm/llms/openai/responses/guardrail_translation/handler.py
@@ -604,8 +604,9 @@ class OpenAIResponsesHandler(BaseTranslation):
             await self._apply_guardrailed_texts(data, input_data, extracted, guardrail_to_apply, guardrailed_inputs)
         if litellm_logging_obj is not None:
             sanitized_input: Final = data.get("input")
-            litellm_logging_obj.messages = sanitized_input
-            litellm_logging_obj.model_call_details["messages"] = sanitized_input
+            sanitized_messages: Final = self.get_structured_messages(data) or []
+            litellm_logging_obj.messages = sanitized_messages
+            litellm_logging_obj.model_call_details["messages"] = sanitized_messages
             litellm_logging_obj.model_call_details["input"] = sanitized_input
         verbose_proxy_logger.debug("OpenAI Responses API: Processed input messages: %s", data.get("input"))
         return data
diff --git a/tests/unit/llms/openai/responses/test_openai_responses_guardrail_handler.py b/tests/unit/llms/openai/responses/test_openai_responses_guardrail_handler.py
index 855301758b2..7e16dc381c9 100644
--- a/tests/unit/llms/openai/responses/test_openai_responses_guardrail_handler.py
+++ b/tests/unit/llms/openai/responses/test_openai_responses_guardrail_handler.py
@@ -210,13 +210,14 @@ class TestOpenAIResponsesHandlerInputProcessing:
         assert result["model"] == "gpt-4"
 
     @pytest.mark.asyncio
-    async def test_rewritten_input_replaces_logging_snapshot(self):
+    async def test_rewritten_input_refreshes_logging_snapshot(self):
         handler = OpenAIResponsesHandler()
         guardrail = MockGuardrail(guardrail_name="test")
         logging_obj = MagicMock()
-        logging_obj.messages = "sensitive-value"
+        original_messages = [{"role": "user", "content": "sensitive-value"}]
+        logging_obj.messages = original_messages
         logging_obj.model_call_details = {
-            "messages": "sensitive-value",
+            "messages": original_messages,
             "input": "sensitive-value",
         }
         data = {"input": "sensitive-value", "model": "gpt-4"}
@@ -224,8 +225,9 @@ class TestOpenAIResponsesHandlerInputProcessing:
         result = await handler.process_input_messages(data, guardrail, logging_obj)
 
         assert result["input"] == "sensitive-value [GUARDRAILED]"
-        assert logging_obj.messages == result["input"]
-        assert logging_obj.model_call_details["messages"] == result["input"]
+        sanitized_messages = [{"role": "user", "content": result["input"]}]
+        assert logging_obj.messages == sanitized_messages
+        assert logging_obj.model_call_details["messages"] == sanitized_messages
         assert logging_obj.model_call_details["input"] == result["input"]
 
     @pytest.mark.asyncio