diff --git a/litellm/proxy/pass_through_endpoints/llm_provider_handlers/anthropic_passthrough_logging_handler.py b/litellm/proxy/pass_through_endpoints/llm_provider_handlers/anthropic_passthrough_logging_handler.py
index e70d6cb7fca..56766134fd3 100644
--- a/litellm/proxy/pass_through_endpoints/llm_provider_handlers/anthropic_passthrough_logging_handler.py
+++ b/litellm/proxy/pass_through_endpoints/llm_provider_handlers/anthropic_passthrough_logging_handler.py
@@ -218,6 +218,9 @@ class AnthropicPassthroughLoggingHandler:
             logging_obj=litellm_logging_obj,
         )
 
+        # Add complete_streaming_response to kwargs so callbacks like Langfuse can access it
+        kwargs["complete_streaming_response"] = complete_streaming_response
+
         return {
             "result": complete_streaming_response,
             "kwargs": kwargs,