diff --git a/litellm/responses/utils.py b/litellm/responses/utils.py
index 74e4d7a533a..4866bc1be88 100644
--- a/litellm/responses/utils.py
+++ b/litellm/responses/utils.py
@@ -914,6 +914,22 @@ class ResponseAPILoggingUtils:
             )
         response_api_usage: ResponseAPIUsage
         if isinstance(usage_input, dict):
+            # Realtime uses input_token_details and output_token_details; convert to
+            # input_tokens_details and output_tokens_details when those are unset.
+            if (
+                usage_input.get("input_tokens_details") is None
+                and "input_token_details" in usage_input
+            ):
+                usage_input["input_tokens_details"] = usage_input[
+                    "input_token_details"
+                ]
+            if (
+                usage_input.get("output_tokens_details") is None
+                and "output_token_details" in usage_input
+            ):
+                usage_input["output_tokens_details"] = usage_input[
+                    "output_token_details"
+                ]
             total_tokens = usage_input.get("total_tokens")
             if total_tokens is None:
                 input_tokens = usage_input.get("input_tokens")