diff --git a/litellm/litellm_core_utils/health_check_helpers.py b/litellm/litellm_core_utils/health_check_helpers.py
index 9e972f1910b..1a760998ecf 100644
--- a/litellm/litellm_core_utils/health_check_helpers.py
+++ b/litellm/litellm_core_utils/health_check_helpers.py
@@ -106,6 +106,21 @@ class HealthCheckHelpers:
         else:
             return await litellm.acompletion(**model_params)
 
+    @staticmethod
+    def _get_responses_health_check_input(
+        prompt: Optional[str] = None,
+        input: Optional[list] = None,
+    ) -> list:
+        if input is not None:
+            return input
+
+        return [
+            {
+                "role": "user",
+                "content": [{"type": "input_text", "text": prompt or "test"}],
+            }
+        ]
+
     @staticmethod
     def get_mode_handlers(
         model: str,
@@ -207,7 +222,10 @@ class HealthCheckHelpers:
             ),
             "responses": lambda: litellm.aresponses(
                 **_filter_model_params(model_params=model_params),
-                input=prompt or "test",
+                input=HealthCheckHelpers._get_responses_health_check_input(
+                    prompt=prompt,
+                    input=input,
+                ),
             ),
             "ocr": lambda: litellm.aocr(
                 **_filter_model_params(model_params=model_params),
diff --git a/tests/test_litellm/litellm_core_utils/test_health_check_helpers.py b/tests/test_litellm/litellm_core_utils/test_health_check_helpers.py
index 867ab675943..babc7b4b653 100644
--- a/tests/test_litellm/litellm_core_utils/test_health_check_helpers.py
+++ b/tests/test_litellm/litellm_core_utils/test_health_check_helpers.py
@@ -82,6 +82,40 @@ def test_get_litellm_internal_health_check_user_api_key_auth():
     assert result.team_alias == LITTELM_INTERNAL_HEALTH_SERVICE_ACCOUNT_NAME
 
 
+def test_get_responses_health_check_input_wraps_prompt_in_responses_message():
+    result = HealthCheckHelpers._get_responses_health_check_input(prompt="ping")
+
+    assert result == [
+        {
+            "role": "user",
+            "content": [{"type": "input_text", "text": "ping"}],
+        }
+    ]
+
+
+@pytest.mark.asyncio
+async def test_get_mode_handlers_responses_uses_structured_responses_input():
+    with patch("litellm.aresponses", new_callable=AsyncMock) as mock_aresponses:
+        mock_aresponses.return_value = {"status": "ok"}
+
+        handler = HealthCheckHelpers.get_mode_handlers(
+            model="chatgpt/gpt-5.4",
+            custom_llm_provider="chatgpt",
+            model_params={"model": "chatgpt/gpt-5.4"},
+            prompt="health test",
+        )["responses"]
+
+        await handler()
+
+        mock_aresponses.assert_awaited_once()
+        assert mock_aresponses.await_args.kwargs["input"] == [
+            {
+                "role": "user",
+                "content": [{"type": "input_text", "text": "health test"}],
+            }
+        ]
+
+
 @pytest.mark.asyncio
 async def test_ahealth_check_failure_masks_raw_request_headers():
     """
@@ -134,4 +168,4 @@ async def test_ahealth_check_failure_masks_raw_request_headers():
     if "Content-Type" in headers:
         assert headers["Content-Type"] == "application/json"
     
-    print(f"Masked Authorization header: {headers.get('Authorization', 'NOT FOUND')}") 
\ No newline at end of file
+    print(f"Masked Authorization header: {headers.get('Authorization', 'NOT FOUND')}")