diff --git a/src/renderer/src/aiCore/provider/__tests__/providerConfig.test.ts b/src/renderer/src/aiCore/provider/__tests__/providerConfig.test.ts
index 20aa78dcb..b1d8e34fc 100644
--- a/src/renderer/src/aiCore/provider/__tests__/providerConfig.test.ts
+++ b/src/renderer/src/aiCore/provider/__tests__/providerConfig.test.ts
@@ -79,7 +79,7 @@ vi.mock('@renderer/services/AssistantService', () => ({
 import { getProviderByModel } from '@renderer/services/AssistantService'
 import type { Model, Provider } from '@renderer/types'
 import { formatApiHost } from '@renderer/utils/api'
-import { isCherryAIProvider, isPerplexityProvider } from '@renderer/utils/provider'
+import { isAzureOpenAIProvider, isCherryAIProvider, isPerplexityProvider } from '@renderer/utils/provider'
 
 import { COPILOT_DEFAULT_HEADERS, COPILOT_EDITOR_VERSION, isCopilotResponsesModel } from '../constants'
 import { getActualProvider, providerToAiSdkConfig } from '../providerConfig'
@@ -133,6 +133,17 @@ const createPerplexityProvider = (): Provider => ({
   isSystem: false
 })
 
+const createAzureProvider = (apiVersion: string): Provider => ({
+  id: 'azure-openai',
+  type: 'azure-openai',
+  name: 'Azure OpenAI',
+  apiKey: 'test-key',
+  apiHost: 'https://example.openai.azure.com/openai',
+  apiVersion,
+  models: [],
+  isSystem: true
+})
+
 describe('Copilot responses routing', () => {
   beforeEach(() => {
     ;(globalThis as any).window = {
@@ -504,3 +515,46 @@ describe('Stream options includeUsage configuration', () => {
     expect(config.providerId).toBe('github-copilot-openai-compatible')
   })
 })
+
+describe('Azure OpenAI traditional API routing', () => {
+  beforeEach(() => {
+    ;(globalThis as any).window = {
+      ...(globalThis as any).window,
+      keyv: createWindowKeyv()
+    }
+    mockGetState.mockReturnValue({
+      settings: {
+        openAI: {
+          streamOptions: {
+            includeUsage: undefined
+          }
+        }
+      }
+    })
+
+    vi.mocked(isAzureOpenAIProvider).mockImplementation((provider) => provider.type === 'azure-openai')
+  })
+
+  it('uses deployment-based URLs when apiVersion is a date version', () => {
+    const provider = createAzureProvider('2024-02-15-preview')
+    const config = providerToAiSdkConfig(provider, createModel('gpt-4o', 'GPT-4o', provider.id))
+
+    expect(config.providerId).toBe('azure')
+    expect(config.options.apiVersion).toBe('2024-02-15-preview')
+    expect(config.options.useDeploymentBasedUrls).toBe(true)
+  })
+
+  it('does not force deployment-based URLs for apiVersion v1/preview', () => {
+    const v1Provider = createAzureProvider('v1')
+    const v1Config = providerToAiSdkConfig(v1Provider, createModel('gpt-4o', 'GPT-4o', v1Provider.id))
+    expect(v1Config.providerId).toBe('azure-responses')
+    expect(v1Config.options.apiVersion).toBe('v1')
+    expect(v1Config.options.useDeploymentBasedUrls).toBeUndefined()
+
+    const previewProvider = createAzureProvider('preview')
+    const previewConfig = providerToAiSdkConfig(previewProvider, createModel('gpt-4o', 'GPT-4o', previewProvider.id))
+    expect(previewConfig.providerId).toBe('azure-responses')
+    expect(previewConfig.options.apiVersion).toBe('preview')
+    expect(previewConfig.options.useDeploymentBasedUrls).toBeUndefined()
+  })
+})
diff --git a/src/renderer/src/aiCore/provider/providerConfig.ts b/src/renderer/src/aiCore/provider/providerConfig.ts
index 556b870e5..0ad15ea89 100644
--- a/src/renderer/src/aiCore/provider/providerConfig.ts
+++ b/src/renderer/src/aiCore/provider/providerConfig.ts
@@ -214,6 +214,15 @@ export function providerToAiSdkConfig(actualProvider: Provider, model: Model): A
   } else if (aiSdkProviderId === 'azure') {
     extraOptions.mode = 'chat'
   }
+  if (isAzureOpenAIProvider(actualProvider)) {
+    const apiVersion = actualProvider.apiVersion?.trim()
+    if (apiVersion) {
+      extraOptions.apiVersion = apiVersion
+      if (!['preview', 'v1'].includes(apiVersion)) {
+        extraOptions.useDeploymentBasedUrls = true
+      }
+    }
+  }
 
   // bedrock
   if (aiSdkProviderId === 'bedrock') {
diff --git a/tests/renderer.setup.ts b/tests/renderer.setup.ts
index 9e10e5363..2f47a8d8e 100644
--- a/tests/renderer.setup.ts
+++ b/tests/renderer.setup.ts
@@ -1,8 +1,15 @@
 import '@testing-library/jest-dom/vitest'
 
+import { createRequire } from 'node:module'
 import { styleSheetSerializer } from 'jest-styled-components/serializer'
 import { expect, vi } from 'vitest'
 
+const require = createRequire(import.meta.url)
+const bufferModule = require('buffer')
+if (!bufferModule.SlowBuffer) {
+  bufferModule.SlowBuffer = bufferModule.Buffer
+}
+
 expect.addSnapshotSerializer(styleSheetSerializer)
 
 // Mock LoggerService globally for renderer tests
@@ -48,3 +55,29 @@ vi.stubGlobal('api', {
     writeWithId: vi.fn().mockResolvedValue(undefined)
   }
 })
+
+if (typeof globalThis.localStorage === 'undefined' || typeof (globalThis.localStorage as any).getItem !== 'function') {
+  let store = new Map<string, string>()
+
+  const localStorageMock = {
+    getItem: (key: string) => store.get(key) ?? null,
+    setItem: (key: string, value: string) => {
+      store.set(key, String(value))
+    },
+    removeItem: (key: string) => {
+      store.delete(key)
+    },
+    clear: () => {
+      store.clear()
+    },
+    key: (index: number) => Array.from(store.keys())[index] ?? null,
+    get length() {
+      return store.size
+    }
+  }
+
+  vi.stubGlobal('localStorage', localStorageMock)
+  if (typeof window !== 'undefined') {
+    Object.defineProperty(window, 'localStorage', { value: localStorageMock })
+  }
+}