diff --git a/src/renderer/src/aiCore/utils/reasoning.ts b/src/renderer/src/aiCore/utils/reasoning.ts
index 10afbbaf5f..422e2d1bc8 100644
--- a/src/renderer/src/aiCore/utils/reasoning.ts
+++ b/src/renderer/src/aiCore/utils/reasoning.ts
@@ -34,7 +34,7 @@ import {
 } from '@renderer/config/models'
 import { getStoreSetting } from '@renderer/hooks/useSettings'
 import { getAssistantSettings, getProviderByModel } from '@renderer/services/AssistantService'
-import type { Assistant, Model } from '@renderer/types'
+import type { Assistant, Model, ReasoningEffortOption } from '@renderer/types'
 import { EFFORT_RATIO, isSystemProvider, SystemProviderIds } from '@renderer/types'
 import type { OpenAIReasoningSummary } from '@renderer/types/aiCoreTypes'
 import type { ReasoningEffortOptionalParams } from '@renderer/types/sdk'
@@ -533,20 +533,25 @@ export function getAnthropicReasoningParams(
   return {}
 }
 
-// type GoogleThinkingLevel = NonNullable<GoogleGenerativeAIProviderOptions['thinkingConfig']>['thinkingLevel']
+type GoogleThinkingLevel = NonNullable<GoogleGenerativeAIProviderOptions['thinkingConfig']>['thinkingLevel']
 
-// function mapToGeminiThinkingLevel(reasoningEffort: ReasoningEffortOption): GoogelThinkingLevel {
-//   switch (reasoningEffort) {
-//     case 'low':
-//       return 'low'
-//     case 'medium':
-//       return 'medium'
-//     case 'high':
-//       return 'high'
-//     default:
-//       return 'medium'
-//   }
-// }
+function mapToGeminiThinkingLevel(reasoningEffort: ReasoningEffortOption): GoogleThinkingLevel {
+  switch (reasoningEffort) {
+    case 'default':
+      return undefined
+    case 'minimal':
+      return 'minimal'
+    case 'low':
+      return 'low'
+    case 'medium':
+      return 'medium'
+    case 'high':
+      return 'high'
+    default:
+      logger.warn('Unknown thinking level for Gemini. Fallback to medium instead.', { reasoningEffort })
+      return 'medium'
+  }
+}
 
 /**
  * 获取 Gemini 推理参数
@@ -581,13 +586,14 @@ export function getGeminiReasoningParams(
 
     // TODO: 很多中转还不支持
     // https://ai.google.dev/gemini-api/docs/gemini-3?thinking=high#new_api_features_in_gemini_3
-    // if (isGemini3ThinkingTokenModel(model)) {
-    //   return {
-    //     thinkingConfig: {
-    //       thinkingLevel: mapToGeminiThinkingLevel(reasoningEffort)
-    //     }
-    //   }
-    // }
+    if (isGemini3ThinkingTokenModel(model)) {
+      return {
+        thinkingConfig: {
+          includeThoughts: true,
+          thinkingLevel: mapToGeminiThinkingLevel(reasoningEffort)
+        }
+      }
+    }
 
     const effortRatio = EFFORT_RATIO[reasoningEffort]