diff --git a/package.json b/package.json
index bd1ccd9d8f..71a6b06982 100644
--- a/package.json
+++ b/package.json
@@ -152,6 +152,7 @@
     "@opentelemetry/sdk-trace-base": "^2.0.0",
     "@opentelemetry/sdk-trace-node": "^2.0.0",
     "@opentelemetry/sdk-trace-web": "^2.0.0",
+    "@opeoginni/github-copilot-openai-compatible": "0.1.18",
     "@playwright/test": "^1.52.0",
     "@radix-ui/react-context-menu": "^2.2.16",
     "@reduxjs/toolkit": "^2.2.5",
diff --git a/packages/aiCore/src/core/plugins/built-in/webSearchPlugin/helper.ts b/packages/aiCore/src/core/plugins/built-in/webSearchPlugin/helper.ts
index 95c2cdda2c..fd68da27d2 100644
--- a/packages/aiCore/src/core/plugins/built-in/webSearchPlugin/helper.ts
+++ b/packages/aiCore/src/core/plugins/built-in/webSearchPlugin/helper.ts
@@ -1,7 +1,7 @@
 import { anthropic } from '@ai-sdk/anthropic'
 import { google } from '@ai-sdk/google'
 import { openai } from '@ai-sdk/openai'
-import { InferToolInput, InferToolOutput } from 'ai'
+import { InferToolInput, InferToolOutput, type Tool } from 'ai'
 
 import { ProviderOptionsMap } from '../../../options/types'
 import { OpenRouterSearchConfig } from './openrouter'
@@ -15,6 +15,13 @@ export type AnthropicSearchConfig = NonNullable<Parameters<typeof anthropic.tool
 export type GoogleSearchConfig = NonNullable<Parameters<typeof google.tools.googleSearch>[0]>
 export type XAISearchConfig = NonNullable<ProviderOptionsMap['xai']['searchParameters']>
 
+type NormalizeTool<T> = T extends Tool<infer INPUT, infer OUTPUT> ? Tool<INPUT, OUTPUT> : Tool<any, any>
+
+type AnthropicWebSearchTool = NormalizeTool<ReturnType<typeof anthropic.tools.webSearch_20250305>>
+type OpenAIWebSearchTool = NormalizeTool<ReturnType<typeof openai.tools.webSearch>>
+type OpenAIChatWebSearchTool = NormalizeTool<ReturnType<typeof openai.tools.webSearchPreview>>
+type GoogleWebSearchTool = NormalizeTool<ReturnType<typeof google.tools.googleSearch>>
+
 /**
  * 插件初始化时接收的完整配置对象
  *
@@ -59,7 +66,7 @@ export const DEFAULT_WEB_SEARCH_CONFIG: WebSearchPluginConfig = {
 
 export type WebSearchToolOutputSchema = {
   // Anthropic 工具 - 手动定义
-  anthropic: InferToolOutput<ReturnType<typeof anthropic.tools.webSearch_20250305>>
+  anthropic: InferToolOutput<AnthropicWebSearchTool>
 
   // OpenAI 工具 - 基于实际输出
   // TODO: 上游定义不规范,是unknown
@@ -82,8 +89,8 @@ export type WebSearchToolOutputSchema = {
 }
 
 export type WebSearchToolInputSchema = {
-  anthropic: InferToolInput<ReturnType<typeof anthropic.tools.webSearch_20250305>>
-  openai: InferToolInput<ReturnType<typeof openai.tools.webSearch>>
-  google: InferToolInput<ReturnType<typeof google.tools.googleSearch>>
-  'openai-chat': InferToolInput<ReturnType<typeof openai.tools.webSearchPreview>>
+  anthropic: InferToolInput<AnthropicWebSearchTool>
+  openai: InferToolInput<OpenAIWebSearchTool>
+  google: InferToolInput<GoogleWebSearchTool>
+  'openai-chat': InferToolInput<OpenAIChatWebSearchTool>
 }
diff --git a/src/renderer/src/aiCore/legacy/clients/openai/OpenAIBaseClient.ts b/src/renderer/src/aiCore/legacy/clients/openai/OpenAIBaseClient.ts
index 430b032749..79762e9474 100644
--- a/src/renderer/src/aiCore/legacy/clients/openai/OpenAIBaseClient.ts
+++ b/src/renderer/src/aiCore/legacy/clients/openai/OpenAIBaseClient.ts
@@ -166,9 +166,7 @@ export abstract class OpenAIBaseClient<
         baseURL: this.getBaseURL(),
         defaultHeaders: {
           ...this.defaultHeaders(),
-          ...this.provider.extra_headers,
-          ...(this.provider.id === 'copilot' ? { 'editor-version': 'vscode/1.97.2' } : {}),
-          ...(this.provider.id === 'copilot' ? { 'copilot-vision-request': 'true' } : {})
+          ...this.provider.extra_headers
         }
       }) as TSdkInstance
     }
diff --git a/src/renderer/src/aiCore/provider/__tests__/providerConfig.test.ts b/src/renderer/src/aiCore/provider/__tests__/providerConfig.test.ts
new file mode 100644
index 0000000000..eb6e73c8ae
--- /dev/null
+++ b/src/renderer/src/aiCore/provider/__tests__/providerConfig.test.ts
@@ -0,0 +1,89 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+vi.mock('@renderer/services/LoggerService', () => ({
+  loggerService: {
+    withContext: () => ({
+      debug: vi.fn(),
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn()
+    })
+  }
+}))
+
+vi.mock('@renderer/services/AssistantService', () => ({
+  getProviderByModel: vi.fn()
+}))
+
+vi.mock('@renderer/store', () => ({
+  default: {
+    getState: () => ({ copilot: { defaultHeaders: {} } })
+  }
+}))
+
+import type { Model, Provider } from '@renderer/types'
+
+import { COPILOT_DEFAULT_HEADERS, COPILOT_EDITOR_VERSION, isCopilotResponsesModel } from '../constants'
+import { providerToAiSdkConfig } from '../providerConfig'
+
+const createWindowKeyv = () => {
+  const store = new Map<string, string>()
+  return {
+    get: (key: string) => store.get(key),
+    set: (key: string, value: string) => {
+      store.set(key, value)
+    }
+  }
+}
+
+const createCopilotProvider = (): Provider => ({
+  id: 'copilot',
+  type: 'openai',
+  name: 'GitHub Copilot',
+  apiKey: 'test-key',
+  apiHost: 'https://api.githubcopilot.com',
+  models: [],
+  isSystem: true
+})
+
+const createModel = (id: string, name = id): Model => ({
+  id,
+  name,
+  provider: 'copilot',
+  group: 'copilot'
+})
+
+describe('Copilot responses routing', () => {
+  beforeEach(() => {
+    ;(globalThis as any).window = {
+      ...(globalThis as any).window,
+      keyv: createWindowKeyv()
+    }
+  })
+
+  it('detects official GPT-5 Codex identifiers case-insensitively', () => {
+    expect(isCopilotResponsesModel(createModel('gpt-5-codex', 'gpt-5-codex'))).toBe(true)
+    expect(isCopilotResponsesModel(createModel('GPT-5-CODEX', 'GPT-5-CODEX'))).toBe(true)
+    expect(isCopilotResponsesModel(createModel('gpt-5-codex', 'custom-name'))).toBe(true)
+    expect(isCopilotResponsesModel(createModel('custom-id', 'custom-name'))).toBe(false)
+  })
+
+  it('configures gpt-5-codex with the Copilot provider', () => {
+    const provider = createCopilotProvider()
+    const config = providerToAiSdkConfig(provider, createModel('gpt-5-codex', 'GPT-5-CODEX'))
+
+    expect(config.providerId).toBe('github-copilot-openai-compatible')
+    expect(config.options.headers?.['Editor-Version']).toBe(COPILOT_EDITOR_VERSION)
+    expect(config.options.headers?.['Copilot-Integration-Id']).toBe(COPILOT_DEFAULT_HEADERS['Copilot-Integration-Id'])
+    expect(config.options.headers?.['copilot-vision-request']).toBe('true')
+  })
+
+  it('uses the Copilot provider for other models and keeps headers', () => {
+    const provider = createCopilotProvider()
+    const config = providerToAiSdkConfig(provider, createModel('gpt-4'))
+
+    expect(config.providerId).toBe('github-copilot-openai-compatible')
+    expect(config.options.headers?.['Editor-Version']).toBe(COPILOT_DEFAULT_HEADERS['Editor-Version'])
+    expect(config.options.headers?.['Copilot-Integration-Id']).toBe(COPILOT_DEFAULT_HEADERS['Copilot-Integration-Id'])
+  })
+})
diff --git a/src/renderer/src/aiCore/provider/constants.ts b/src/renderer/src/aiCore/provider/constants.ts
new file mode 100644
index 0000000000..c7cd90bd93
--- /dev/null
+++ b/src/renderer/src/aiCore/provider/constants.ts
@@ -0,0 +1,25 @@
+import type { Model } from '@renderer/types'
+
+export const COPILOT_EDITOR_VERSION = 'vscode/1.104.1'
+export const COPILOT_PLUGIN_VERSION = 'copilot-chat/0.26.7'
+export const COPILOT_INTEGRATION_ID = 'vscode-chat'
+export const COPILOT_USER_AGENT = 'GitHubCopilotChat/0.26.7'
+
+export const COPILOT_DEFAULT_HEADERS = {
+  'Copilot-Integration-Id': COPILOT_INTEGRATION_ID,
+  'User-Agent': COPILOT_USER_AGENT,
+  'Editor-Version': COPILOT_EDITOR_VERSION,
+  'Editor-Plugin-Version': COPILOT_PLUGIN_VERSION,
+  'editor-version': COPILOT_EDITOR_VERSION,
+  'editor-plugin-version': COPILOT_PLUGIN_VERSION,
+  'copilot-vision-request': 'true'
+} as const
+
+// Models that require the OpenAI Responses endpoint when routed through GitHub Copilot (#10560)
+const COPILOT_RESPONSES_MODEL_IDS = ['gpt-5-codex']
+
+export function isCopilotResponsesModel(model: Model): boolean {
+  const normalizedId = model.id?.trim().toLowerCase()
+  const normalizedName = model.name?.trim().toLowerCase()
+  return COPILOT_RESPONSES_MODEL_IDS.some((target) => normalizedId === target || normalizedName === target)
+}
diff --git a/src/renderer/src/aiCore/provider/factory.ts b/src/renderer/src/aiCore/provider/factory.ts
index bfcd3da383..62211100fe 100644
--- a/src/renderer/src/aiCore/provider/factory.ts
+++ b/src/renderer/src/aiCore/provider/factory.ts
@@ -28,7 +28,8 @@ const STATIC_PROVIDER_MAPPING: Record<string, ProviderId> = {
   gemini: 'google', // Google Gemini -> google
   'azure-openai': 'azure', // Azure OpenAI -> azure
   'openai-response': 'openai', // OpenAI Responses -> openai
-  grok: 'xai' // Grok -> xai
+  grok: 'xai', // Grok -> xai
+  copilot: 'github-copilot-openai-compatible'
 }
 
 /**
diff --git a/src/renderer/src/aiCore/provider/providerConfig.ts b/src/renderer/src/aiCore/provider/providerConfig.ts
index fb463cfad9..1fa34e5a1a 100644
--- a/src/renderer/src/aiCore/provider/providerConfig.ts
+++ b/src/renderer/src/aiCore/provider/providerConfig.ts
@@ -21,6 +21,7 @@ import { formatApiHost } from '@renderer/utils/api'
 import { cloneDeep, trim } from 'lodash'
 
 import { aihubmixProviderCreator, newApiResolverCreator, vertexAnthropicProviderCreator } from './config'
+import { COPILOT_DEFAULT_HEADERS } from './constants'
 import { getAiSdkProviderId } from './factory'
 
 const logger = loggerService.withContext('ProviderConfigProcessor')
@@ -109,6 +110,9 @@ function formatProviderApiHost(provider: Provider): Provider {
     if (!formatted.anthropicApiHost) {
       formatted.anthropicApiHost = formatted.apiHost
     }
+  } else if (formatted.id === 'copilot') {
+    const trimmed = trim(formatted.apiHost)
+    formatted.apiHost = trimmed.endsWith('/') ? trimmed.slice(0, -1) : trimmed
   } else if (formatted.type === 'gemini') {
     formatted.apiHost = formatApiHost(formatted.apiHost, 'v1beta')
   } else {
@@ -151,6 +155,26 @@ export function providerToAiSdkConfig(
     baseURL: trim(actualProvider.apiHost),
     apiKey: getRotatedApiKey(actualProvider)
   }
+
+  const isCopilotProvider = actualProvider.id === 'copilot'
+  if (isCopilotProvider) {
+    const storedHeaders = store.getState().copilot.defaultHeaders ?? {}
+    const options = ProviderConfigFactory.fromProvider('github-copilot-openai-compatible', baseConfig, {
+      headers: {
+        ...COPILOT_DEFAULT_HEADERS,
+        ...storedHeaders,
+        ...actualProvider.extra_headers
+      },
+      name: actualProvider.id,
+      includeUsage: true
+    })
+
+    return {
+      providerId: 'github-copilot-openai-compatible',
+      options
+    }
+  }
+
   // 处理OpenAI模式
   const extraOptions: any = {}
   if (actualProvider.type === 'openai-response' && !isOpenAIChatCompletionOnlyModel(model)) {
@@ -172,15 +196,6 @@ export function providerToAiSdkConfig(
       }
     }
   }
-
-  // copilot
-  if (actualProvider.id === 'copilot') {
-    extraOptions.headers = {
-      ...extraOptions.headers,
-      'editor-version': 'vscode/1.97.2',
-      'copilot-vision-request': 'true'
-    }
-  }
   // azure
   if (aiSdkProviderId === 'azure' || actualProvider.type === 'azure-openai') {
     extraOptions.apiVersion = actualProvider.apiVersion
@@ -229,7 +244,6 @@ export function providerToAiSdkConfig(
     }
   }
 
-  // 如果AI SDK支持该provider，使用原生配置
   if (hasProviderConfig(aiSdkProviderId) && aiSdkProviderId !== 'openai-compatible') {
     const options = ProviderConfigFactory.fromProvider(aiSdkProviderId, baseConfig, extraOptions)
     return {
@@ -277,9 +291,17 @@ export async function prepareSpecialProviderConfig(
 ) {
   switch (provider.id) {
     case 'copilot': {
-      const defaultHeaders = store.getState().copilot.defaultHeaders
-      const { token } = await window.api.copilot.getToken(defaultHeaders)
+      const defaultHeaders = store.getState().copilot.defaultHeaders ?? {}
+      const headers = {
+        ...COPILOT_DEFAULT_HEADERS,
+        ...defaultHeaders
+      }
+      const { token } = await window.api.copilot.getToken(headers)
       config.options.apiKey = token
+      config.options.headers = {
+        ...headers,
+        ...config.options.headers
+      }
       break
     }
     case 'cherryai': {
diff --git a/src/renderer/src/aiCore/provider/providerInitialization.ts b/src/renderer/src/aiCore/provider/providerInitialization.ts
index 3c188313b9..2a19729d7e 100644
--- a/src/renderer/src/aiCore/provider/providerInitialization.ts
+++ b/src/renderer/src/aiCore/provider/providerInitialization.ts
@@ -32,6 +32,14 @@ export const NEW_PROVIDER_CONFIGS: ProviderConfig[] = [
     supportsImageGeneration: true,
     aliases: ['vertexai-anthropic']
   },
+  {
+    id: 'github-copilot-openai-compatible',
+    name: 'GitHub Copilot OpenAI Compatible',
+    import: () => import('@opeoginni/github-copilot-openai-compatible'),
+    creatorFunctionName: 'createGitHubCopilotOpenAICompatible',
+    supportsImageGeneration: false,
+    aliases: ['copilot', 'github-copilot']
+  },
   {
     id: 'bedrock',
     name: 'Amazon Bedrock',
diff --git a/yarn.lock b/yarn.lock
index c78a39930b..8279b69dda 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -191,7 +191,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@ai-sdk/openai@npm:2.0.42, @ai-sdk/openai@npm:^2.0.42":
+"@ai-sdk/openai@npm:2.0.42":
   version: 2.0.42
   resolution: "@ai-sdk/openai@npm:2.0.42"
   dependencies:
@@ -203,6 +203,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@ai-sdk/openai@npm:^2.0.42":
+  version: 2.0.47
+  resolution: "@ai-sdk/openai@npm:2.0.47"
+  dependencies:
+    "@ai-sdk/provider": "npm:2.0.0"
+    "@ai-sdk/provider-utils": "npm:3.0.11"
+  peerDependencies:
+    zod: ^3.25.76 || ^4.1.8
+  checksum: 10c0/7fabcdda707134971bcc2b285705d4595f8bf419285dbdd9266b3b0858ea11b6ac200e63dd2eeb1822f99571910093d64d4a76154a365331cf184f56452933c6
+  languageName: node
+  linkType: hard
+
 "@ai-sdk/perplexity@npm:^2.0.11":
   version: 2.0.11
   resolution: "@ai-sdk/perplexity@npm:2.0.11"
@@ -228,6 +240,19 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@ai-sdk/provider-utils@npm:3.0.11":
+  version: 3.0.11
+  resolution: "@ai-sdk/provider-utils@npm:3.0.11"
+  dependencies:
+    "@ai-sdk/provider": "npm:2.0.0"
+    "@standard-schema/spec": "npm:^1.0.0"
+    eventsource-parser: "npm:^3.0.5"
+  peerDependencies:
+    zod: ^3.25.76 || ^4.1.8
+  checksum: 10c0/31081b127b48f3eefb448eaca59574b4631da9577aa0778622d28669c71bbde0361c9b37962c5edbb1d0c163ed1479755fc889da9251a03e906b1e27d0d2eb24
+  languageName: node
+  linkType: hard
+
 "@ai-sdk/provider@npm:2.0.0, @ai-sdk/provider@npm:^2.0.0":
   version: 2.0.0
   resolution: "@ai-sdk/provider@npm:2.0.0"
@@ -237,6 +262,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@ai-sdk/provider@npm:^2.1.0-beta.4":
+  version: 2.1.0-beta.5
+  resolution: "@ai-sdk/provider@npm:2.1.0-beta.5"
+  dependencies:
+    json-schema: "npm:^0.4.0"
+  checksum: 10c0/4f51813285a8e92be18ef14645b0505bb0c9d2daa0d9290cac8a3c1f87d8e2e8507b1edf1818ae2305a90723e8cd44477f55f0631407dee35912ab8fdded52ba
+  languageName: node
+  linkType: hard
+
 "@ai-sdk/xai@npm:^2.0.23":
   version: 2.0.23
   resolution: "@ai-sdk/xai@npm:2.0.23"
@@ -7673,6 +7707,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@opeoginni/github-copilot-openai-compatible@npm:0.1.18":
+  version: 0.1.18
+  resolution: "@opeoginni/github-copilot-openai-compatible@npm:0.1.18"
+  dependencies:
+    "@ai-sdk/openai": "npm:^2.0.42"
+    "@ai-sdk/openai-compatible": "npm:^1.0.19"
+    "@ai-sdk/provider": "npm:^2.1.0-beta.4"
+    "@ai-sdk/provider-utils": "npm:^3.0.10"
+  checksum: 10c0/31b87ed150883bbdd33a0203e45831859560fdf174f0285384fdcb1d01fc4a56ca15f31d648e8d6d3a2d4d5c6e327ddecbf422543eeefaa7e8fdd7dc2f2a3b08
+  languageName: node
+  linkType: hard
+
 "@oxc-project/runtime@npm:0.71.0":
   version: 0.71.0
   resolution: "@oxc-project/runtime@npm:0.71.0"
@@ -14238,6 +14284,7 @@ __metadata:
     "@opentelemetry/sdk-trace-base": "npm:^2.0.0"
     "@opentelemetry/sdk-trace-node": "npm:^2.0.0"
     "@opentelemetry/sdk-trace-web": "npm:^2.0.0"
+    "@opeoginni/github-copilot-openai-compatible": "npm:0.1.18"
     "@playwright/test": "npm:^1.52.0"
     "@radix-ui/react-context-menu": "npm:^2.2.16"
     "@reduxjs/toolkit": "npm:^2.2.5"