From faf9133ea377feb98bf7c1a5c741762543255438 Mon Sep 17 00:00:00 2001
From: factnn <166481866+factnn@users.noreply.github.com>
Date: Sat, 4 Jul 2026 15:54:07 +0800
Subject: [PATCH] fix: write overhead to dict-typed responses via key
 assignment

TypedDict responses (e.g. AnthropicMessagesResponse) are plain
dicts at runtime, so hasattr(response, "_hidden_params") returns
False. Also assign via response["_hidden_params"] for dict types.
---
 litellm/proxy/common_request_processing.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/litellm/proxy/common_request_processing.py b/litellm/proxy/common_request_processing.py
index f9c9a6c4aa2..f4d0cb52af6 100644
--- a/litellm/proxy/common_request_processing.py
+++ b/litellm/proxy/common_request_processing.py
@@ -1448,6 +1448,8 @@ class ProxyBaseLLMRequestProcessing:
                 _overhead_hidden_params["litellm_overhead_time_ms"] = overhead_ms
                 if hasattr(response, "_hidden_params"):
                     response._hidden_params = _overhead_hidden_params
+                elif isinstance(response, dict):
+                    response["_hidden_params"] = _overhead_hidden_params
 
         _exception_raised = False
         try: