From d5c8e199703856cbffc5307911bde00fa17784a2 Mon Sep 17 00:00:00 2001
From: Sameer Kankute <sameer@berri.ai>
Date: Fri, 17 Apr 2026 18:58:35 +0530
Subject: [PATCH] Fix mypy error

---
 .../litellm_completion_transformation/transformation.py        | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/litellm/responses/litellm_completion_transformation/transformation.py b/litellm/responses/litellm_completion_transformation/transformation.py
index 5d5e305c7e6..7096c1cdf45 100644
--- a/litellm/responses/litellm_completion_transformation/transformation.py
+++ b/litellm/responses/litellm_completion_transformation/transformation.py
@@ -32,6 +32,7 @@ from litellm.types.llms.openai import (
     OpenAIWebSearchOptions,
     OpenAIWebSearchUserLocation,
     OutputTokensDetails,
+    Reasoning,
     ResponseAPIUsage,
     ResponsesAPIOptionalRequestParams,
     ResponsesAPIResponse,
@@ -181,7 +182,7 @@ class LiteLLMCompletionResponsesConfig:
             )
 
         # Extract reasoning_effort from reasoning parameter
-        reasoning_effort = None
+        reasoning_effort: Optional[Union[Reasoning, str]] = None
         reasoning_param = responses_api_request.get("reasoning")
         if reasoning_param:
             if isinstance(reasoning_param, dict):