diff --git a/src/renderer/src/providers/AiProvider/OpenAIProvider.ts b/src/renderer/src/providers/AiProvider/OpenAIProvider.ts
index a2ab49b634..a06edcd521 100644
--- a/src/renderer/src/providers/AiProvider/OpenAIProvider.ts
+++ b/src/renderer/src/providers/AiProvider/OpenAIProvider.ts
@@ -284,7 +284,7 @@ export default class OpenAIProvider extends BaseOpenAIProvider {
       if (isSupportedReasoningEffortModel(model) || isSupportedThinkingTokenModel(model)) {
         return {
           reasoning: {
-            effort: assistant?.settings?.reasoning_effort
+            effort: assistant?.settings?.reasoning_effort === 'auto' ? 'medium' : assistant?.settings?.reasoning_effort
           }
         }
       }