diff --git a/src/renderer/src/aiCore/utils/reasoning.ts b/src/renderer/src/aiCore/utils/reasoning.ts
index d7f17e00d5..732fee384d 100644
--- a/src/renderer/src/aiCore/utils/reasoning.ts
+++ b/src/renderer/src/aiCore/utils/reasoning.ts
@@ -5,6 +5,7 @@ import {
   GEMINI_FLASH_MODEL_REGEX,
   getThinkModelType,
   isDeepSeekHybridInferenceModel,
+  isDoubaoSeedAfter251015,
   isDoubaoThinkingAutoModel,
   isGrok4FastReasoningModel,
   isGrokReasoningModel,
@@ -170,6 +171,10 @@ export function getReasoningEffort(assistant: Assistant, model: Model): Reasonin
 
   // Doubao 思考模式支持
   if (isSupportedThinkingTokenDoubaoModel(model)) {
+    if (isDoubaoSeedAfter251015(model)) {
+      return { reasoningEffort }
+    }
+    // Comment below this line seems weird. reasoning is high instead of null/undefined. Who wrote this?
     // reasoningEffort 为空，默认开启 enabled
     if (reasoningEffort === 'high') {
       return { thinking: { type: 'enabled' } }
@@ -226,12 +231,12 @@ export function getReasoningEffort(assistant: Assistant, model: Model): Reasonin
     const supportedOptions = MODEL_SUPPORTED_REASONING_EFFORT[modelType]
     if (supportedOptions.includes(reasoningEffort)) {
       return {
-        reasoning_effort: reasoningEffort
+        reasoningEffort
       }
     } else {
       // 如果不支持，fallback到第一个支持的值
       return {
-        reasoning_effort: supportedOptions[0]
+        reasoningEffort: supportedOptions[0]
       }
     }
   }
diff --git a/src/renderer/src/config/__test__/reasoning.test.ts b/src/renderer/src/config/__test__/reasoning.test.ts
new file mode 100644
index 0000000000..96fad861f3
--- /dev/null
+++ b/src/renderer/src/config/__test__/reasoning.test.ts
@@ -0,0 +1,166 @@
+import { describe, expect, it, vi } from 'vitest'
+
+import { isDoubaoSeedAfter251015, isDoubaoThinkingAutoModel } from '../models/reasoning'
+
+// FIXME: Idk why it's imported. Maybe circular dependency somewhere
+vi.mock('@renderer/services/AssistantService.ts', () => ({
+  getDefaultAssistant: () => {
+    return {
+      id: 'default',
+      name: 'default',
+      emoji: '😀',
+      prompt: '',
+      topics: [],
+      messages: [],
+      type: 'assistant',
+      regularPhrases: [],
+      settings: {}
+    }
+  }
+}))
+
+describe('Doubao Models', () => {
+  describe('isDoubaoThinkingAutoModel', () => {
+    it('should return false for invalid models', () => {
+      expect(
+        isDoubaoThinkingAutoModel({
+          id: 'doubao-seed-1-6-251015',
+          name: 'doubao-seed-1-6-251015',
+          provider: '',
+          group: ''
+        })
+      ).toBe(false)
+      expect(
+        isDoubaoThinkingAutoModel({
+          id: 'doubao-seed-1-6-lite-251015',
+          name: 'doubao-seed-1-6-lite-251015',
+          provider: '',
+          group: ''
+        })
+      ).toBe(false)
+      expect(
+        isDoubaoThinkingAutoModel({
+          id: 'doubao-seed-1-6-thinking-250715',
+          name: 'doubao-seed-1-6-thinking-250715',
+          provider: '',
+          group: ''
+        })
+      ).toBe(false)
+      expect(
+        isDoubaoThinkingAutoModel({
+          id: 'doubao-seed-1-6-flash',
+          name: 'doubao-seed-1-6-flash',
+          provider: '',
+          group: ''
+        })
+      ).toBe(false)
+      expect(
+        isDoubaoThinkingAutoModel({
+          id: 'doubao-seed-1-6-thinking',
+          name: 'doubao-seed-1-6-thinking',
+          provider: '',
+          group: ''
+        })
+      ).toBe(false)
+    })
+
+    it('should return true for valid models', () => {
+      expect(
+        isDoubaoThinkingAutoModel({
+          id: 'doubao-seed-1-6-250615',
+          name: 'doubao-seed-1-6-250615',
+          provider: '',
+          group: ''
+        })
+      ).toBe(true)
+      expect(
+        isDoubaoThinkingAutoModel({
+          id: 'Doubao-Seed-1.6',
+          name: 'Doubao-Seed-1.6',
+          provider: '',
+          group: ''
+        })
+      ).toBe(true)
+      expect(
+        isDoubaoThinkingAutoModel({
+          id: 'doubao-1-5-thinking-pro-m',
+          name: 'doubao-1-5-thinking-pro-m',
+          provider: '',
+          group: ''
+        })
+      ).toBe(true)
+      expect(
+        isDoubaoThinkingAutoModel({
+          id: 'doubao-seed-1.6-lite',
+          name: 'doubao-seed-1.6-lite',
+          provider: '',
+          group: ''
+        })
+      ).toBe(true)
+      expect(
+        isDoubaoThinkingAutoModel({
+          id: 'doubao-1-5-thinking-pro-m-12345',
+          name: 'doubao-1-5-thinking-pro-m-12345',
+          provider: '',
+          group: ''
+        })
+      ).toBe(true)
+    })
+  })
+
+  describe('isDoubaoSeedAfter251015', () => {
+    it('should return true for models matching the pattern', () => {
+      expect(
+        isDoubaoSeedAfter251015({
+          id: 'doubao-seed-1-6-251015',
+          name: '',
+          provider: '',
+          group: ''
+        })
+      ).toBe(true)
+      expect(
+        isDoubaoSeedAfter251015({
+          id: 'doubao-seed-1-6-lite-251015',
+          name: '',
+          provider: '',
+          group: ''
+        })
+      ).toBe(true)
+    })
+
+    it('should return false for models not matching the pattern', () => {
+      expect(
+        isDoubaoSeedAfter251015({
+          id: 'doubao-seed-1-6-250615',
+          name: '',
+          provider: '',
+          group: ''
+        })
+      ).toBe(false)
+      expect(
+        isDoubaoSeedAfter251015({
+          id: 'Doubao-Seed-1.6',
+          name: '',
+          provider: '',
+          group: ''
+        })
+      ).toBe(false)
+      expect(
+        isDoubaoSeedAfter251015({
+          id: 'doubao-1-5-thinking-pro-m',
+          name: '',
+          provider: '',
+          group: ''
+        })
+      ).toBe(false)
+      expect(
+        isDoubaoSeedAfter251015({
+          id: 'doubao-seed-1-6-lite-251016',
+          name: '',
+          provider: '',
+          group: ''
+        })
+      ).toBe(false)
+    })
+  })
+})
diff --git a/src/renderer/src/config/models/reasoning.ts b/src/renderer/src/config/models/reasoning.ts
index 1ef0303f61..a7e825ef4f 100644
--- a/src/renderer/src/config/models/reasoning.ts
+++ b/src/renderer/src/config/models/reasoning.ts
@@ -31,6 +31,7 @@ export const MODEL_SUPPORTED_REASONING_EFFORT: ReasoningEffortConfig = {
   qwen_thinking: ['low', 'medium', 'high'] as const,
   doubao: ['auto', 'high'] as const,
   doubao_no_auto: ['high'] as const,
+  doubao_after_251015: ['minimal', 'low', 'medium', 'high'] as const,
   hunyuan: ['auto'] as const,
   zhipu: ['auto'] as const,
   perplexity: ['low', 'medium', 'high'] as const,
@@ -51,6 +52,7 @@ export const MODEL_SUPPORTED_OPTIONS: ThinkingOptionConfig = {
   qwen_thinking: MODEL_SUPPORTED_REASONING_EFFORT.qwen_thinking,
   doubao: ['off', ...MODEL_SUPPORTED_REASONING_EFFORT.doubao] as const,
   doubao_no_auto: ['off', ...MODEL_SUPPORTED_REASONING_EFFORT.doubao_no_auto] as const,
+  doubao_after_251015: MODEL_SUPPORTED_REASONING_EFFORT.doubao_after_251015,
   hunyuan: ['off', ...MODEL_SUPPORTED_REASONING_EFFORT.hunyuan] as const,
   zhipu: ['off', ...MODEL_SUPPORTED_REASONING_EFFORT.zhipu] as const,
   perplexity: MODEL_SUPPORTED_REASONING_EFFORT.perplexity,
@@ -85,6 +87,8 @@ export const getThinkModelType = (model: Model): ThinkingModelType => {
   } else if (isSupportedThinkingTokenDoubaoModel(model)) {
     if (isDoubaoThinkingAutoModel(model)) {
       thinkingModelType = 'doubao'
+    } else if (isDoubaoSeedAfter251015(model)) {
+      thinkingModelType = 'doubao_after_251015'
     } else {
       thinkingModelType = 'doubao_no_auto'
     }
@@ -308,14 +312,21 @@ export const DOUBAO_THINKING_MODEL_REGEX =
   /doubao-(?:1[.-]5-thinking-vision-pro|1[.-]5-thinking-pro-m|seed-1[.-]6(?:-flash)?(?!-(?:thinking)(?:-|$)))(?:-[\w-]+)*/i
 
 // 支持 auto 的 Doubao 模型 doubao-seed-1.6-xxx doubao-seed-1-6-xxx  doubao-1-5-thinking-pro-m-xxx
+// Auto thinking is no longer supported after version 251015, see https://console.volcengine.com/ark/region:ark+cn-beijing/model/detail?Id=doubao-seed-1-6
 export const DOUBAO_THINKING_AUTO_MODEL_REGEX =
-  /doubao-(1-5-thinking-pro-m|seed-1[.-]6)(?!-(?:flash|thinking)(?:-|$))(?:-[\w-]+)*/i
+  /doubao-(1-5-thinking-pro-m|seed-1[.-]6)(?!-(?:flash|thinking)(?:-|$))(?:-lite)?(?!-251015)(?:-\d+)?$/i
 
 export function isDoubaoThinkingAutoModel(model: Model): boolean {
   const modelId = getLowerBaseModelName(model.id)
   return DOUBAO_THINKING_AUTO_MODEL_REGEX.test(modelId) || DOUBAO_THINKING_AUTO_MODEL_REGEX.test(model.name)
 }
 
+export function isDoubaoSeedAfter251015(model: Model): boolean {
+  const pattern = new RegExp(/doubao-seed-1-6-(?:lite-)?251015/i)
+  const result = pattern.test(model.id)
+  return result
+}
+
 export function isSupportedThinkingTokenDoubaoModel(model?: Model): boolean {
   if (!model) {
     return false
diff --git a/src/renderer/src/types/index.ts b/src/renderer/src/types/index.ts
index 76f44204ab..5690a6c557 100644
--- a/src/renderer/src/types/index.ts
+++ b/src/renderer/src/types/index.ts
@@ -85,6 +85,7 @@ const ThinkModelTypes = [
   'qwen_thinking',
   'doubao',
   'doubao_no_auto',
+  'doubao_after_251015',
   'hunyuan',
   'zhipu',
   'perplexity',
diff --git a/src/renderer/src/types/sdk.ts b/src/renderer/src/types/sdk.ts
index 54a7896be4..e18891f2bf 100644
--- a/src/renderer/src/types/sdk.ts
+++ b/src/renderer/src/types/sdk.ts
@@ -78,6 +78,7 @@ export type ReasoningEffortOptionalParams = {
   thinking?: { type: 'disabled' | 'enabled' | 'auto'; budget_tokens?: number }
   reasoning?: { max_tokens?: number; exclude?: boolean; effort?: string; enabled?: boolean } | OpenAI.Reasoning
   reasoningEffort?: OpenAI.Chat.Completions.ChatCompletionCreateParams['reasoning_effort'] | 'none' | 'auto'
+  // WARN: This field will be overwrite to undefined by aisdk if the provider is openai-compatible. Use reasoningEffort instead.
   reasoning_effort?: OpenAI.Chat.Completions.ChatCompletionCreateParams['reasoning_effort'] | 'none' | 'auto'
   enable_thinking?: boolean
   thinking_budget?: number