Add xAI API provider support

src/background/index.mjs

@@ -31,6 +31,7 @@ import {
   isUsingAimlApiModel,
   isUsingDeepSeekApiModel,
   isUsingGoogleApiModel,
+  isUsingXaiApiModel,
 } from '../config/index.mjs'
 import '../_locales/i18n'
 import { openUrl } from '../utils/open-url'
@@ -402,6 +403,7 @@ function isUsingOpenAICompatibleApiSession(session) {
     isUsingOpenRouterApiModel(session) ||
     isUsingAimlApiModel(session) ||
     isUsingGoogleApiModel(session) ||
+    isUsingXaiApiModel(session) ||
     isUsingGptCompletionApiModel(session)
   )
 }

src/config/index.mjs

@@ -187,6 +187,7 @@ export const googleApiModelKeys = [
   'googleGemini2_5Flash',
   'googleGemini2_5FlashLite',
 ]
+export const xaiApiModelKeys = ['xaiGrok4_5', 'xaiGrok4_3']
 
 export const AlwaysCustomGroups = [
   'ollamaApiModelKeys',
@@ -265,6 +266,10 @@ export const ModelGroups = {
     value: googleApiModelKeys,
     desc: 'Google (API)',
   },
+  xaiApiModelKeys: {
+    value: xaiApiModelKeys,
+    desc: 'xAI (API)',
+  },
   customApiModelKeys: {
     value: customApiModelKeys,
     desc: 'Custom Model',
@@ -641,6 +646,14 @@ export const Models = {
     value: 'gemini-2.5-flash-lite',
     desc: 'Google (Gemini 2.5 Flash-Lite)',
   },
+  xaiGrok4_5: {
+    value: 'grok-4.5',
+    desc: 'xAI (Grok 4.5)',
+  },
+  xaiGrok4_3: {
+    value: 'grok-4.3',
+    desc: 'xAI (Grok 4.3)',
+  },
 }
 
 for (const modelName in Models) {
@@ -710,6 +723,7 @@ export const defaultConfig = {
   openRouterApiKey: '',
   aimlApiKey: '',
   googleApiKey: '',
+  xaiApiKey: '',
 
   // advanced
 
@@ -745,6 +759,7 @@ export const defaultConfig = {
     'chatgptApi5_6Sol',
     'chatgptApi5_6Terra',
     'chatgptApi5_6Luna',
+    'xaiGrok4_5',
     'claudeOpus48Api',
     'claudeSonnet5Api',
     'claudeHaiku45Api',
@@ -911,6 +926,10 @@ export function isUsingGoogleApiModel(configOrSession) {
   return isInApiModeGroup(googleApiModelKeys, configOrSession)
 }
 
+export function isUsingXaiApiModel(configOrSession) {
+  return isInApiModeGroup(xaiApiModelKeys, configOrSession)
+}
+
 export function isUsingChatGLMApiModel(configOrSession) {
   return isInApiModeGroup(chatglmApiModelKeys, configOrSession)
 }

src/config/openai-provider-mappings.mjs

@@ -7,6 +7,7 @@ export const LEGACY_API_KEY_FIELD_BY_PROVIDER_ID = {
   chatglm: 'chatglmApiKey',
   ollama: 'ollamaApiKey',
   google: 'googleApiKey',
+  xai: 'xaiApiKey',
   'legacy-custom-default': 'customApiKey',
 }
 
@@ -28,5 +29,6 @@ export const OPENAI_COMPATIBLE_GROUP_TO_PROVIDER_ID = {
   chatglmApiModelKeys: 'chatglm',
   ollamaApiModelKeys: 'ollama',
   googleApiModelKeys: 'google',
+  xaiApiModelKeys: 'xai',
   customApiModelKeys: 'legacy-custom-default',
 }

src/popup/sections/GeneralPart.jsx

@@ -60,6 +60,8 @@ function getProviderApiKeySetupUrl(providerId) {
   switch (String(providerId || '').trim()) {
     case 'openai':
       return 'https://platform.openai.com/account/api-keys'
+    case 'xai':
+      return 'https://console.x.ai/team/default/api-keys'
     case 'moonshot':
       return 'https://platform.moonshot.cn/console/api-keys'
     default:

src/services/apis/provider-registry.mjs

@@ -78,6 +78,14 @@ const BUILTIN_PROVIDER_TEMPLATE = [
     builtin: true,
     enabled: true,
   },
+  {
+    id: 'xai',
+    name: 'xAI',
+    baseUrl: 'https://api.x.ai/v1',
+    chatCompletionsPath: '/chat/completions',
+    builtin: true,
+    enabled: true,
+  },
   {
     id: 'legacy-custom-default',
     name: 'Custom Model (Legacy)',
@@ -120,6 +128,7 @@ function resolveProviderIdFromLegacyModelName(modelName) {
   }
   if (preset.startsWith('chatglm') || preset === 'chatglmApiModelKeys') return 'chatglm'
   if (preset.startsWith('googleGemini') || preset === 'googleApiModelKeys') return 'google'
+  if (preset.startsWith('xaiGrok') || preset === 'xaiApiModelKeys') return 'xai'
   if (preset === 'customApiModelKeys') return 'legacy-custom-default'
 
   return null

tests/unit/config/config-predicates.test.mjs

@@ -9,6 +9,7 @@ import {
   claudeApiModelKeys,
   openRouterApiModelKeys,
   aimlApiModelKeys,
+  xaiApiModelKeys,
   isUsingAimlApiModel,
   isUsingAzureOpenAiApiModel,
   isUsingBingWebModel,
@@ -28,6 +29,7 @@ import {
   isUsingOpenAiApiModel,
   isUsingGptCompletionApiModel,
   isUsingOpenRouterApiModel,
+  isUsingXaiApiModel,
 } from '../../../src/config/index.mjs'
 import {
   LEGACY_MODEL_KEY_MIGRATIONS,
@@ -242,6 +244,13 @@ test('isUsingOpenRouterApiModel accepts exported OpenRouter API model keys', ()
   }
 })
 
+test('isUsingXaiApiModel accepts exported xAI API model keys', () => {
+  for (const modelName of xaiApiModelKeys) {
+    assert.equal(isUsingXaiApiModel({ modelName }), true)
+  }
+  assert.equal(isUsingXaiApiModel({ modelName: 'chatgptApi4oMini' }), false)
+})
+
 test('isUsingAimlApiModel matches representative AI/ML API keys', () => {
   for (const modelName of representativeAimlApiModelNames) {
     assert.equal(isUsingAimlApiModel({ modelName }), true)

tests/unit/services/apis/provider-registry.test.mjs

@@ -2578,6 +2578,11 @@ test('resolveOpenAICompatibleRequest avoids duplicate /v1 for custom provider ba
   assert.equal(resolved.requestUrl, 'https://proxy.example.com/v1/chat/completions')
 })
 
+test('resolveProviderIdForSession resolves legacy xAI model names to xai provider', () => {
+  assert.equal(resolveProviderIdForSession({ modelName: 'xaiGrok4_5' }), 'xai')
+  assert.equal(resolveProviderIdForSession({ modelName: 'xaiApiModelKeys-custom' }), 'xai')
+})
+
 test('resolveOpenAICompatibleRequest preserves /v1 for custom provider baseUrl with explicit non-default paths', () => {
   const config = {
     customOpenAIProviders: [

tests/unit/services/apis/thin-adapters.test.mjs

@@ -63,6 +63,13 @@ const adapters = [
     expectedBaseUrl: 'https://open.bigmodel.cn/api/paas/v4',
     expectedApiKey: 'glm-key',
   },
+  {
+    name: 'xai-api',
+    apiMode: { groupName: 'xaiApiModelKeys', itemName: 'xaiGrok4_5' },
+    providerId: 'xai',
+    expectedBaseUrl: 'https://api.x.ai/v1',
+    expectedApiKey: 'xai-key',
+  },
 ]
 
 for (const adapter of adapters) {