fix(cost): carry image and video input tokens through the Responses usage bridge (internal copy of #36887)

litellm/responses/litellm_completion_transformation/transformation.py

@@ -2876,6 +2876,8 @@ def _transform_chat_completion_usage_to_responses_usage(
                 cached_tokens=prompt_details.cached_tokens if prompt_details.cached_tokens is not None else 0,
                 text_tokens=prompt_details.text_tokens,
                 audio_tokens=prompt_details.audio_tokens,
+                image_tokens=prompt_details.image_tokens,
+                video_tokens=prompt_details.video_tokens,
                 cached_tokens_details=(
                     cached_tokens_details if isinstance(cached_tokens_details, CachedTokensDetails) else None
                 ),

litellm/responses/utils.py

@@ -1194,6 +1194,7 @@ def _transform_response_api_usage_to_chat_usage(
                     cached_tokens_details=getattr(
                         response_api_usage.input_tokens_details, "cached_tokens_details", None
                     ),
+                    video_tokens=getattr(response_api_usage.input_tokens_details, "video_tokens", None),
                     cache_write_tokens=getattr(response_api_usage.input_tokens_details, "cache_write_tokens", None),
                     web_search_requests=getattr(response_api_usage.input_tokens_details, "web_search_requests", None),
                     google_maps_grounding_requests=getattr(

litellm/types/llms/openai.py

@@ -1297,7 +1297,9 @@ class InputTokensDetails(BaseLiteLLMOpenAIResponseObject):
     audio_tokens: int | None = None
     cached_tokens: int = 0
     cached_tokens_details: CachedTokensDetails | None = None
+    image_tokens: int | None = None
     text_tokens: int | None = None
+    video_tokens: int | None = None
 
     model_config = {"extra": "allow"}
 

tests/test_litellm/responses/litellm_completion_transformation/test_litellm_completion_responses.py

@@ -2917,6 +2917,39 @@ def test_transform_usage_preserves_cache_write_tokens(self):
         assert getattr(response_usage.input_tokens_details, "cache_write_tokens", None) == 800
         assert response_usage.input_tokens_details.model_dump()["cache_write_tokens"] == 800
 
+    def test_transform_usage_preserves_input_modality_tokens(self):
+        """Regression: the bridge dropped image and video input tokens.
+
+        Vertex reports prompt tokens split by modality, so a Live session that sends
+        camera frames arrives with image_tokens set. InputTokensDetails declared only
+        audio/cached/text, so those tokens were folded into text and lost their
+        attribution, and any per-modality rate could never apply to them.
+        """
+        usage = Usage(
+            prompt_tokens=300,
+            completion_tokens=10,
+            total_tokens=310,
+            prompt_tokens_details=PromptTokensDetailsWrapper(
+                text_tokens=20, audio_tokens=80, image_tokens=150, video_tokens=50, cached_tokens=0
+            ),
+            completion_tokens_details=CompletionTokensDetailsWrapper(text_tokens=10),
+        )
+
+        response_usage = LiteLLMCompletionResponsesConfig._transform_chat_completion_usage_to_responses_usage(
+            chat_completion_response=usage
+        )
+        details = response_usage.input_tokens_details
+        assert details is not None
+        assert getattr(details, "image_tokens", None) == 150
+        assert getattr(details, "video_tokens", None) == 50
+        assert getattr(details, "audio_tokens", None) == 80
+
+        from litellm.responses.utils import ResponseAPILoggingUtils
+
+        back = ResponseAPILoggingUtils._transform_response_api_usage_to_chat_usage(response_usage.model_dump())
+        assert back.prompt_tokens_details.image_tokens == 150
+        assert back.prompt_tokens_details.video_tokens == 50
+
     def test_transform_usage_with_reasoning_tokens_gemini(self):
         """Test that reasoning_tokens from Gemini are properly transformed to output_tokens_details"""
         # Setup: Simulate Gemini usage with thoughtsTokenCount