From 78aa0b2ea7812ba343c88e5041ffb491e01d543e Mon Sep 17 00:00:00 2001
From: factnn <166481866+factnn@users.noreply.github.com>
Date: Sun, 21 Jun 2026 13:37:55 +0800
Subject: [PATCH] fix: use logging_obj.start_time for overhead calculation

Previously the call passed start_time=end_time, producing
_response_ms=0 and negative litellm_overhead_time_ms.
Use logging_obj.start_time with end_time fallback instead.
---
 litellm/proxy/common_request_processing.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/litellm/proxy/common_request_processing.py b/litellm/proxy/common_request_processing.py
index 80262a146c5..f08962000c5 100644
--- a/litellm/proxy/common_request_processing.py
+++ b/litellm/proxy/common_request_processing.py
@@ -1437,12 +1437,13 @@ class ProxyBaseLLMRequestProcessing:
                     update_response_metadata,
                 )
 
+                start_time = logging_obj.start_time or end_time
                 update_response_metadata(
                     result=response,
                     logging_obj=logging_obj,
                     model=self.data.get("model"),
                     kwargs=self.data,
-                    start_time=end_time,
+                    start_time=start_time,
                     end_time=end_time,
                 )