diff --git a/src/components/settings/ProvidersSettings.tsx b/src/components/settings/ProvidersSettings.tsx
index 602eb1066..f812e5724 100644
--- a/src/components/settings/ProvidersSettings.tsx
+++ b/src/components/settings/ProvidersSettings.tsx
@@ -31,6 +31,7 @@ import {
 } from '@/stores/providers';
 import {
   PROVIDER_TYPE_INFO,
+  getProviderDocsUrl,
   type ProviderType,
   getProviderIconUrl,
   resolveProviderApiKeyForSave,
@@ -318,6 +319,7 @@ function ProviderCard({
   const [saving, setSaving] = useState(false);
 
   const typeInfo = PROVIDER_TYPE_INFO.find((t) => t.id === account.vendorId);
+  const providerDocsUrl = getProviderDocsUrl(typeInfo, i18n.language);
   const showModelIdField = shouldShowProviderModelId(typeInfo, devModeUnlocked);
   const canEditModelConfig = Boolean(typeInfo?.showBaseUrl || showModelIdField);
 
@@ -522,12 +524,10 @@ function ProviderCard({
 
       {isEditing && (
         <div className="space-y-6 mt-4 pt-4 border-t border-black/5 dark:border-white/5">
-          {account.vendorId === 'custom' && (
+          {providerDocsUrl && (
             <div className="flex justify-end -mt-2 mb-2">
               <a
-                href={i18n.language.startsWith('zh')
-                  ? 'https://icnnp7d0dymg.feishu.cn/wiki/BmiLwGBcEiloZDkdYnGc8RWnn6d#IWQCdfe5fobGU3xf3UGcgbLynGh'
-                  : 'https://icnnp7d0dymg.feishu.cn/wiki/BmiLwGBcEiloZDkdYnGc8RWnn6d#Ee1ldfvKJoVGvfxc32mcILwenth'}
+                href={providerDocsUrl}
                 target="_blank"
                 rel="noopener noreferrer"
                 className="text-[12px] text-blue-500 hover:text-blue-600 font-medium inline-flex items-center gap-1"
@@ -799,6 +799,7 @@ function AddProviderDialog({
   const [authMode, setAuthMode] = useState<'oauth' | 'apikey'>('apikey');
 
   const typeInfo = PROVIDER_TYPE_INFO.find((t) => t.id === selectedType);
+  const providerDocsUrl = getProviderDocsUrl(typeInfo, i18n.language);
   const showModelIdField = shouldShowProviderModelId(typeInfo, devModeUnlocked);
   const isOAuth = typeInfo?.isOAuth ?? false;
   const supportsApiKey = typeInfo?.supportsApiKey ?? false;
@@ -1092,13 +1093,11 @@ function AddProviderDialog({
                   >
                     {t('aiProviders.dialog.change')}
                   </button>
-                  {selectedType === 'custom' && (
+                  {providerDocsUrl && (
                     <>
                       <span className="mx-2 text-foreground/20">|</span>
                       <a
-                        href={i18n.language.startsWith('zh')
-                          ? 'https://icnnp7d0dymg.feishu.cn/wiki/BmiLwGBcEiloZDkdYnGc8RWnn6d#IWQCdfe5fobGU3xf3UGcgbLynGh'
-                          : 'https://icnnp7d0dymg.feishu.cn/wiki/BmiLwGBcEiloZDkdYnGc8RWnn6d#Ee1ldfvKJoVGvfxc32mcILwenth'}
+                        href={providerDocsUrl}
                         target="_blank"
                         rel="noopener noreferrer"
                         className="text-[13px] text-blue-500 hover:text-blue-600 font-medium inline-flex items-center gap-1"
diff --git a/src/lib/providers.ts b/src/lib/providers.ts
index 2d0e4d8a3..6bb8de1ec 100644
--- a/src/lib/providers.ts
+++ b/src/lib/providers.ts
@@ -73,6 +73,8 @@ export interface ProviderTypeInfo {
   isOAuth?: boolean;
   supportsApiKey?: boolean;
   apiKeyUrl?: string;
+  docsUrl?: string;
+  docsUrlZh?: string;
 }
 
 export type ProviderAuthMode =
@@ -121,7 +123,15 @@ import { providerIcons } from '@/assets/providers';
 
 /** All supported provider types with UI metadata */
 export const PROVIDER_TYPE_INFO: ProviderTypeInfo[] = [
-  { id: 'anthropic', name: 'Anthropic', icon: '🤖', placeholder: 'sk-ant-api03-...', model: 'Claude', requiresApiKey: true },
+  {
+    id: 'anthropic',
+    name: 'Anthropic',
+    icon: '🤖',
+    placeholder: 'sk-ant-api03-...',
+    model: 'Claude',
+    requiresApiKey: true,
+    docsUrl: 'https://platform.claude.com/docs/en/api/overview',
+  },
   {
     id: 'openai',
     name: 'OpenAI',
@@ -145,15 +155,26 @@ export const PROVIDER_TYPE_INFO: ProviderTypeInfo[] = [
     defaultModelId: 'gemini-3.1-pro-preview',
     apiKeyUrl: 'https://aistudio.google.com/app/apikey',
   },
-  { id: 'openrouter', name: 'OpenRouter', icon: '🌐', placeholder: 'sk-or-v1-...', model: 'Multi-Model', requiresApiKey: true, showModelId: true, modelIdPlaceholder: 'anthropic/claude-opus-4.6', defaultModelId: 'anthropic/claude-opus-4.6' },
-  { id: 'ark', name: 'ByteDance Ark', icon: 'A', placeholder: 'your-ark-api-key', model: 'Doubao', requiresApiKey: true, defaultBaseUrl: 'https://ark.cn-beijing.volces.com/api/v3', showBaseUrl: true, showModelId: true, modelIdPlaceholder: 'ep-20260228000000-xxxxx' },
-  { id: 'moonshot', name: 'Moonshot (CN)', icon: '🌙', placeholder: 'sk-...', model: 'Kimi', requiresApiKey: true, defaultBaseUrl: 'https://api.moonshot.cn/v1', defaultModelId: 'kimi-k2.5' },
-  { id: 'siliconflow', name: 'SiliconFlow (CN)', icon: '🌊', placeholder: 'sk-...', model: 'Multi-Model', requiresApiKey: true, defaultBaseUrl: 'https://api.siliconflow.cn/v1', showModelId: true, modelIdPlaceholder: 'deepseek-ai/DeepSeek-V3', defaultModelId: 'deepseek-ai/DeepSeek-V3' },
-  { id: 'minimax-portal', name: 'MiniMax (Global)', icon: '☁️', placeholder: 'sk-...', model: 'MiniMax', requiresApiKey: false, isOAuth: true, supportsApiKey: true, defaultModelId: 'MiniMax-M2.5', apiKeyUrl: 'https://intl.minimaxi.com/' },
+  { id: 'openrouter', name: 'OpenRouter', icon: '🌐', placeholder: 'sk-or-v1-...', model: 'Multi-Model', requiresApiKey: true, showModelId: true, modelIdPlaceholder: 'openai/gpt-5.4', defaultModelId: 'openai/gpt-5.4', docsUrl: 'https://openrouter.ai/models' },
   { id: 'minimax-portal-cn', name: 'MiniMax (CN)', icon: '☁️', placeholder: 'sk-...', model: 'MiniMax', requiresApiKey: false, isOAuth: true, supportsApiKey: true, defaultModelId: 'MiniMax-M2.5', apiKeyUrl: 'https://platform.minimaxi.com/' },
-  { id: 'qwen-portal', name: 'Qwen', icon: '☁️', placeholder: 'sk-...', model: 'Qwen', requiresApiKey: false, isOAuth: true, defaultModelId: 'coder-model' },
+  { id: 'moonshot', name: 'Moonshot (CN)', icon: '🌙', placeholder: 'sk-...', model: 'Kimi', requiresApiKey: true, defaultBaseUrl: 'https://api.moonshot.cn/v1', defaultModelId: 'kimi-k2.5', docsUrl: 'https://platform.moonshot.cn/' },
+  { id: 'siliconflow', name: 'SiliconFlow (CN)', icon: '🌊', placeholder: 'sk-...', model: 'Multi-Model', requiresApiKey: true, defaultBaseUrl: 'https://api.siliconflow.cn/v1', showModelId: true, modelIdPlaceholder: 'deepseek-ai/DeepSeek-V3', defaultModelId: 'deepseek-ai/DeepSeek-V3', docsUrl: 'https://docs.siliconflow.cn/cn/userguide/introduction' },
+  { id: 'minimax-portal', name: 'MiniMax (Global)', icon: '☁️', placeholder: 'sk-...', model: 'MiniMax', requiresApiKey: false, isOAuth: true, supportsApiKey: true, defaultModelId: 'MiniMax-M2.5', apiKeyUrl: 'https://intl.minimaxi.com/' },
+  { id: 'qwen-portal', name: 'Qwen (Global)', icon: '☁️', placeholder: 'sk-...', model: 'Qwen', requiresApiKey: false, isOAuth: true, defaultModelId: 'coder-model' },
+  { id: 'ark', name: 'ByteDance Ark', icon: 'A', placeholder: 'your-ark-api-key', model: 'Doubao', requiresApiKey: true, defaultBaseUrl: 'https://ark.cn-beijing.volces.com/api/v3', showBaseUrl: true, showModelId: true, modelIdPlaceholder: 'ep-20260228000000-xxxxx', docsUrl: 'https://www.volcengine.com/' },
   { id: 'ollama', name: 'Ollama', icon: '🦙', placeholder: 'Not required', requiresApiKey: false, defaultBaseUrl: 'http://localhost:11434/v1', showBaseUrl: true, showModelId: true, modelIdPlaceholder: 'qwen3:latest' },
-  { id: 'custom', name: 'Custom', icon: '⚙️', placeholder: 'API key...', requiresApiKey: true, showBaseUrl: true, showModelId: true, modelIdPlaceholder: 'your-provider/model-id' },
+  {
+    id: 'custom',
+    name: 'Custom',
+    icon: '⚙️',
+    placeholder: 'API key...',
+    requiresApiKey: true,
+    showBaseUrl: true,
+    showModelId: true,
+    modelIdPlaceholder: 'your-provider/model-id',
+    docsUrl: 'https://icnnp7d0dymg.feishu.cn/wiki/BmiLwGBcEiloZDkdYnGc8RWnn6d#Ee1ldfvKJoVGvfxc32mcILwenth',
+    docsUrlZh: 'https://icnnp7d0dymg.feishu.cn/wiki/BmiLwGBcEiloZDkdYnGc8RWnn6d#IWQCdfe5fobGU3xf3UGcgbLynGh',
+  },
 ];
 
 /** Get the SVG logo URL for a provider type, falls back to undefined */
@@ -174,6 +195,21 @@ export function getProviderTypeInfo(type: ProviderType): ProviderTypeInfo | unde
   return PROVIDER_TYPE_INFO.find((t) => t.id === type);
 }
 
+export function getProviderDocsUrl(
+  provider: Pick<ProviderTypeInfo, 'docsUrl' | 'docsUrlZh'> | undefined,
+  language: string
+): string | undefined {
+  if (!provider?.docsUrl) {
+    return undefined;
+  }
+
+  if (language.startsWith('zh') && provider.docsUrlZh) {
+    return provider.docsUrlZh;
+  }
+
+  return provider.docsUrl;
+}
+
 export function shouldShowProviderModelId(
   provider: Pick<ProviderTypeInfo, 'showModelId' | 'showModelIdInDevModeOnly'> | undefined,
   devModeUnlocked: boolean
diff --git a/src/pages/Setup/index.tsx b/src/pages/Setup/index.tsx
index 03439fba3..bd5c08181 100644
--- a/src/pages/Setup/index.tsx
+++ b/src/pages/Setup/index.tsx
@@ -97,6 +97,7 @@ import {
   type ProviderAccount,
   type ProviderType,
   type ProviderTypeInfo,
+  getProviderDocsUrl,
   getProviderIconUrl,
   resolveProviderApiKeyForSave,
   resolveProviderModelForSave,
@@ -713,7 +714,7 @@ function ProviderContent({
   onApiKeyChange,
   onConfiguredChange,
 }: ProviderContentProps) {
-  const { t } = useTranslation(['setup', 'settings']);
+  const { t, i18n } = useTranslation(['setup', 'settings']);
   const devModeUnlocked = useSettingsStore((state) => state.devModeUnlocked);
   const [showKey, setShowKey] = useState(false);
   const [validating, setValidating] = useState(false);
@@ -975,6 +976,7 @@ function ProviderContent({
   }, [providerMenuOpen]);
 
   const selectedProviderData = providers.find((p) => p.id === selectedProvider);
+  const providerDocsUrl = getProviderDocsUrl(selectedProviderData, i18n.language);
   const selectedProviderIconUrl = selectedProviderData
     ? getProviderIconUrl(selectedProviderData.id)
     : undefined;
@@ -1139,7 +1141,20 @@ function ProviderContent({
     <div className="space-y-6">
       {/* Provider selector — dropdown */}
       <div className="space-y-2">
-        <Label>{t('provider.label')}</Label>
+        <div className="flex items-center justify-between gap-3">
+          <Label>{t('provider.label')}</Label>
+          {selectedProvider && providerDocsUrl && (
+            <a
+              href={providerDocsUrl}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="text-[13px] text-blue-500 hover:text-blue-600 font-medium inline-flex items-center gap-1"
+            >
+              {t('settings:aiProviders.dialog.customDoc')}
+              <ExternalLink className="h-3 w-3" />
+            </a>
+          )}
+        </div>
         <div className="relative" ref={providerMenuRef}>
           <button
             type="button"
diff --git a/tests/unit/providers.test.ts b/tests/unit/providers.test.ts
index ce22b7197..124fe3cf5 100644
--- a/tests/unit/providers.test.ts
+++ b/tests/unit/providers.test.ts
@@ -2,6 +2,7 @@ import { describe, expect, it } from 'vitest';
 import {
   PROVIDER_TYPES,
   PROVIDER_TYPE_INFO,
+  getProviderDocsUrl,
   resolveProviderApiKeyForSave,
   resolveProviderModelForSave,
   shouldShowProviderModelId,
@@ -72,13 +73,37 @@ describe('provider metadata', () => {
     );
   });
 
+  it('exposes provider documentation links', () => {
+    const anthropic = PROVIDER_TYPE_INFO.find((provider) => provider.id === 'anthropic');
+    const openrouter = PROVIDER_TYPE_INFO.find((provider) => provider.id === 'openrouter');
+    const moonshot = PROVIDER_TYPE_INFO.find((provider) => provider.id === 'moonshot');
+    const siliconflow = PROVIDER_TYPE_INFO.find((provider) => provider.id === 'siliconflow');
+    const ark = PROVIDER_TYPE_INFO.find((provider) => provider.id === 'ark');
+    const custom = PROVIDER_TYPE_INFO.find((provider) => provider.id === 'custom');
+
+    expect(anthropic).toMatchObject({
+      docsUrl: 'https://platform.claude.com/docs/en/api/overview',
+    });
+    expect(getProviderDocsUrl(anthropic, 'en')).toBe('https://platform.claude.com/docs/en/api/overview');
+    expect(getProviderDocsUrl(openrouter, 'en')).toBe('https://openrouter.ai/models');
+    expect(getProviderDocsUrl(moonshot, 'en')).toBe('https://platform.moonshot.cn/');
+    expect(getProviderDocsUrl(siliconflow, 'en')).toBe('https://docs.siliconflow.cn/cn/userguide/introduction');
+    expect(getProviderDocsUrl(ark, 'en')).toBe('https://www.volcengine.com/');
+    expect(getProviderDocsUrl(custom, 'en')).toBe(
+      'https://icnnp7d0dymg.feishu.cn/wiki/BmiLwGBcEiloZDkdYnGc8RWnn6d#Ee1ldfvKJoVGvfxc32mcILwenth'
+    );
+    expect(getProviderDocsUrl(custom, 'zh-CN')).toBe(
+      'https://icnnp7d0dymg.feishu.cn/wiki/BmiLwGBcEiloZDkdYnGc8RWnn6d#IWQCdfe5fobGU3xf3UGcgbLynGh'
+    );
+  });
+
   it('exposes OpenRouter and SiliconFlow model overrides by default', () => {
     const openrouter = PROVIDER_TYPE_INFO.find((provider) => provider.id === 'openrouter');
     const siliconflow = PROVIDER_TYPE_INFO.find((provider) => provider.id === 'siliconflow');
 
     expect(openrouter).toMatchObject({
       showModelId: true,
-      defaultModelId: 'anthropic/claude-opus-4.6',
+      defaultModelId: 'openai/gpt-5.4',
     });
     expect(siliconflow).toMatchObject({
       showModelId: true,
@@ -102,8 +127,8 @@ describe('provider metadata', () => {
     expect(resolveProviderModelForSave(openrouter, 'openai/gpt-5', true)).toBe('openai/gpt-5');
     expect(resolveProviderModelForSave(siliconflow, 'Qwen/Qwen3-Coder-480B-A35B-Instruct', true)).toBe('Qwen/Qwen3-Coder-480B-A35B-Instruct');
 
-    expect(resolveProviderModelForSave(openrouter, '   ', false)).toBe('anthropic/claude-opus-4.6');
-    expect(resolveProviderModelForSave(openrouter, '   ', true)).toBe('anthropic/claude-opus-4.6');
+    expect(resolveProviderModelForSave(openrouter, '   ', false)).toBe('openai/gpt-5.4');
+    expect(resolveProviderModelForSave(openrouter, '   ', true)).toBe('openai/gpt-5.4');
     expect(resolveProviderModelForSave(siliconflow, '   ', true)).toBe('deepseek-ai/DeepSeek-V3');
     expect(resolveProviderModelForSave(ark, '  ep-custom-model  ', false)).toBe('ep-custom-model');
   });