diff --git a/openless-all/app/src-tauri/src/commands.rs b/openless-all/app/src-tauri/src/commands.rs
index ef74c7a7..14599065 100644
--- a/openless-all/app/src-tauri/src/commands.rs
+++ b/openless-all/app/src-tauri/src/commands.rs
@@ -1,7 +1,10 @@
 //! Tauri command surface — every IPC entry the React UI invokes lives here.
 
 use std::sync::Arc;
+use std::time::Duration;
 
+use serde::Serialize;
+use serde_json::Value;
 use tauri::{AppHandle, State};
 
 use crate::coordinator::Coordinator;
@@ -81,6 +84,123 @@ pub fn read_credential(account: String) -> Result<Option<String>, String> {
     CredentialsVault::get(acc).map_err(|e| e.to_string())
 }
 
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ProviderCheckResult {
+    ok: bool,
+    model_count: usize,
+}
+
+#[derive(Serialize)]
+pub struct ProviderModelsResult {
+    models: Vec<String>,
+}
+
+#[tauri::command]
+pub async fn validate_provider_credentials(kind: String) -> Result<ProviderCheckResult, String> {
+    let config = read_openai_provider_config(&kind)?;
+    fetch_provider_models(&config)
+        .await
+        .map(|models| ProviderCheckResult {
+            ok: true,
+            model_count: models.len(),
+        })
+}
+
+#[tauri::command]
+pub async fn list_provider_models(kind: String) -> Result<ProviderModelsResult, String> {
+    let config = read_openai_provider_config(&kind)?;
+    fetch_provider_models(&config)
+        .await
+        .map(|models| ProviderModelsResult { models })
+}
+
+struct ProviderConfig {
+    base_url: String,
+    api_key: String,
+}
+
+fn read_openai_provider_config(kind: &str) -> Result<ProviderConfig, String> {
+    let (api_key_account, endpoint_account) = match kind {
+        "llm" => (CredentialAccount::ArkApiKey, CredentialAccount::ArkEndpoint),
+        "asr" => (CredentialAccount::AsrApiKey, CredentialAccount::AsrEndpoint),
+        _ => return Err(format!("unknown provider kind: {kind}")),
+    };
+    let api_key = CredentialsVault::get(api_key_account)
+        .map_err(|e| e.to_string())?
+        .unwrap_or_default();
+    let base_url = CredentialsVault::get(endpoint_account)
+        .map_err(|e| e.to_string())?
+        .unwrap_or_default();
+    if api_key.trim().is_empty() {
+        return Err("API Key 为空".to_string());
+    }
+    if base_url.trim().is_empty() {
+        return Err("Endpoint 为空".to_string());
+    }
+    Ok(ProviderConfig { base_url, api_key })
+}
+
+async fn fetch_provider_models(config: &ProviderConfig) -> Result<Vec<String>, String> {
+    let url = models_url(&config.base_url);
+    log::info!("[provider-check] GET {url}");
+    let client = reqwest::Client::builder()
+        .timeout(Duration::from_secs(15))
+        .build()
+        .map_err(|e| format!("HTTP client 初始化失败: {e}"))?;
+    let response = client
+        .get(&url)
+        .header("Authorization", format!("Bearer {}", config.api_key))
+        .send()
+        .await
+        .map_err(|e| {
+            if e.is_timeout() {
+                "请求超时".to_string()
+            } else {
+                format!("网络错误: {e}")
+            }
+        })?;
+    let status = response.status();
+    let body = response
+        .text()
+        .await
+        .map_err(|e| format!("读取响应失败: {e}"))?;
+    if !status.is_success() {
+        return Err(format!("providerHttpStatus:{}", status.as_u16()));
+    }
+    parse_model_ids(&body)
+}
+
+fn models_url(base_url: &str) -> String {
+    let trimmed = base_url.trim().trim_end_matches('/');
+    if trimmed.ends_with("/models") {
+        return trimmed.to_string();
+    }
+    if let Some(prefix) = trimmed.strip_suffix("/chat/completions") {
+        return format!("{prefix}/models");
+    }
+    format!("{trimmed}/models")
+}
+
+fn parse_model_ids(body: &str) -> Result<Vec<String>, String> {
+    let json: Value =
+        serde_json::from_str(body).map_err(|e| format!("模型列表不是有效 JSON: {e}"))?;
+    let data = json
+        .get("data")
+        .and_then(|v| v.as_array())
+        .ok_or_else(|| "模型列表缺少 data 数组".to_string())?;
+    let mut models = data
+        .iter()
+        .filter_map(|item| item.get("id").and_then(|id| id.as_str()))
+        .map(str::trim)
+        .filter(|id| !id.is_empty())
+        .map(ToOwned::to_owned)
+        .collect::<Vec<_>>();
+    models.sort();
+    models.dedup();
+    Ok(models)
+}
+
 fn parse_account(s: &str) -> Result<CredentialAccount, String> {
     match s {
         "volcengine.app_key" => Ok(CredentialAccount::VolcengineAppKey),
@@ -325,3 +445,28 @@ pub fn trigger_microphone_prompt(app: AppHandle) -> Result<(), String> {
 
 #[allow(dead_code)]
 fn _ensure_snapshot_used(_: CredentialsSnapshot) {}
+
+#[cfg(test)]
+mod tests {
+    use super::{models_url, parse_model_ids};
+
+    #[test]
+    fn models_url_accepts_base_or_chat_endpoint() {
+        assert_eq!(
+            models_url("https://api.openai.com/v1"),
+            "https://api.openai.com/v1/models"
+        );
+        assert_eq!(
+            models_url("https://api.openai.com/v1/chat/completions"),
+            "https://api.openai.com/v1/models"
+        );
+    }
+
+    #[test]
+    fn parse_model_ids_sorts_and_deduplicates() {
+        let models =
+            parse_model_ids(r#"{ "data": [{ "id": "b" }, { "id": "a" }, { "id": "b" }] }"#)
+                .unwrap();
+        assert_eq!(models, vec!["a".to_string(), "b".to_string()]);
+    }
+}
diff --git a/openless-all/app/src-tauri/src/lib.rs b/openless-all/app/src-tauri/src/lib.rs
index 4d7b9f10..05c8b46c 100644
--- a/openless-all/app/src-tauri/src/lib.rs
+++ b/openless-all/app/src-tauri/src/lib.rs
@@ -175,6 +175,8 @@ pub fn run() {
             commands::read_credential,
             commands::set_active_asr_provider,
             commands::set_active_llm_provider,
+            commands::validate_provider_credentials,
+            commands::list_provider_models,
             restart_app,
         ])
         .build(tauri::generate_context!())
diff --git a/openless-all/app/src/i18n/en.ts b/openless-all/app/src/i18n/en.ts
index fa335452..65454910 100644
--- a/openless-all/app/src/i18n/en.ts
+++ b/openless-all/app/src/i18n/en.ts
@@ -246,6 +246,21 @@ export const en: typeof zhCN = {
       appIdLabel: 'App ID',
       accessKeyLabel: 'Access Key',
       resourceIdLabel: 'Resource ID',
+      toolsLabel: 'Connection check',
+      toolsDesc: 'Save the fields above, then validate credentials or fetch models. Manual model input remains available if fetching fails.',
+      validate: 'Validate',
+      validating: 'Validating…',
+      fetchModels: 'Fetch models',
+      loadingModels: 'Fetching models…',
+      modelsEmpty: 'Credentials are valid, but no models were returned.',
+      modelsLoaded: 'Fetched {{count}} models.',
+      selectModel: 'Select a model to fill the field above',
+      modelSaved: 'Saved model {{model}}.',
+      validateSuccess: 'Credentials are valid. {{count}} models available.',
+      providerHttpStatus: 'Provider returned HTTP {{status}}. Check the API key permissions or endpoint.',
+      apiKeyMissing: 'API Key is empty.',
+      endpointMissing: 'Endpoint is empty.',
+      requestTimeout: 'Request timed out. Try again later.',
     },
     shortcuts: {
       title: 'Shortcut reference',
diff --git a/openless-all/app/src/i18n/zh-CN.ts b/openless-all/app/src/i18n/zh-CN.ts
index cf98f614..6d9f99bf 100644
--- a/openless-all/app/src/i18n/zh-CN.ts
+++ b/openless-all/app/src/i18n/zh-CN.ts
@@ -244,6 +244,21 @@ export const zhCN = {
       appIdLabel: 'App ID（应用 ID）',
       accessKeyLabel: 'Access Key',
       resourceIdLabel: '资源 ID',
+      toolsLabel: '连接检查',
+      toolsDesc: '先保存上方配置，再验证鉴权或拉取模型；失败时仍可手动填写模型 ID。',
+      validate: '验证',
+      validating: '验证中…',
+      fetchModels: '拉取模型',
+      loadingModels: '拉取模型中…',
+      modelsEmpty: '鉴权成功，但没有返回可用模型。',
+      modelsLoaded: '已拉取 {{count}} 个模型。',
+      selectModel: '选择一个模型写入上方字段',
+      modelSaved: '已保存模型 {{model}}。',
+      validateSuccess: '鉴权成功，可用模型 {{count}} 个。',
+      providerHttpStatus: '供应商接口返回 {{status}}，请检查 API Key 权限或 Endpoint。',
+      apiKeyMissing: 'API Key 为空。',
+      endpointMissing: 'Endpoint 为空。',
+      requestTimeout: '请求超时，请稍后重试。',
     },
     shortcuts: {
       title: '快捷键速查',
diff --git a/openless-all/app/src/lib/ipc.ts b/openless-all/app/src/lib/ipc.ts
index a1cabd6b..2602e6af 100644
--- a/openless-all/app/src/lib/ipc.ts
+++ b/openless-all/app/src/lib/ipc.ts
@@ -63,6 +63,15 @@ const mockCredentialsStatus: CredentialsStatus = {
   arkConfigured: true,
 };
 
+export interface ProviderCheckResult {
+  ok: boolean;
+  modelCount: number;
+}
+
+export interface ProviderModelsResult {
+  models: string[];
+}
+
 const mockHotkeyStatus: HotkeyStatus = {
   adapter: 'windowsLowLevel',
   state: 'installed',
@@ -131,6 +140,14 @@ export function readCredential(account: string): Promise<string | null> {
   return invokeOrMock<string | null>('read_credential', { account }, () => null);
 }
 
+export function validateProviderCredentials(kind: 'llm' | 'asr'): Promise<ProviderCheckResult> {
+  return invokeOrMock('validate_provider_credentials', { kind }, () => ({ ok: true, modelCount: 2 }));
+}
+
+export function listProviderModels(kind: 'llm' | 'asr'): Promise<ProviderModelsResult> {
+  return invokeOrMock('list_provider_models', { kind }, () => ({ models: kind === 'llm' ? ['gpt-4o', 'deepseek-chat'] : ['whisper-1'] }));
+}
+
 // ── History ────────────────────────────────────────────────────────────
 export function listHistory(): Promise<DictationSession[]> {
   return invokeOrMock('list_history', undefined, () => mockHistory);
diff --git a/openless-all/app/src/pages/Settings.tsx b/openless-all/app/src/pages/Settings.tsx
index 08f70b28..b0f7bc04 100644
--- a/openless-all/app/src/pages/Settings.tsx
+++ b/openless-all/app/src/pages/Settings.tsx
@@ -15,12 +15,14 @@ import {
   getHotkeyStatus,
   openExternal,
   openSystemSettings,
+  listProviderModels,
   readCredential,
   requestAccessibilityPermission,
   requestMicrophonePermission,
   setActiveAsrProvider,
   setActiveLlmProvider,
   setCredential,
+  validateProviderCredentials,
 } from '../lib/ipc';
 import type {
   HotkeyCapability,
@@ -286,6 +288,8 @@ function ProvidersSection() {
   const { prefs, updatePrefs } = useHotkeySettings();
   const [llmProvider, setLlmProvider] = useState<LlmPresetId>('ark');
   const [asrProvider, setAsrProvider] = useState<AsrPresetId>('volcengine');
+  const [llmModelRevision, setLlmModelRevision] = useState(0);
+  const [asrModelRevision, setAsrModelRevision] = useState(0);
 
   useEffect(() => {
     if (!prefs) return;
@@ -342,8 +346,9 @@ function ProvidersSection() {
         <CredentialField key={`${llmProvider}:api_key`} label={t('settings.providers.apiKeyLabel')} account="ark.api_key" mono mask />
         <CredentialField key={`${llmProvider}:endpoint`} label={t('settings.providers.baseUrlLabel')} account="ark.endpoint"
           placeholder={preset.baseUrl || 'https://your-endpoint/v1'} />
-        <CredentialField key={`${llmProvider}:model`} label={t('settings.providers.modelLabel')} account="ark.model_id"
+        <CredentialField key={`${llmProvider}:model:${llmModelRevision}`} label={t('settings.providers.modelLabel')} account="ark.model_id"
           placeholder={preset.modelPlaceholder || 'model-name'} mono />
+        <ProviderTools key={llmProvider} kind="llm" modelAccount="ark.model_id" onModelSelected={() => setLlmModelRevision(v => v + 1)} />
       </Card>
 
       <Card>
@@ -374,8 +379,9 @@ function ProvidersSection() {
             <CredentialField key={`${asrProvider}:api_key`} label={t('settings.providers.apiKeyLabel')} account="asr.api_key" mono mask />
             <CredentialField key={`${asrProvider}:endpoint`} label={t('settings.providers.baseUrlLabel')} account="asr.endpoint"
               placeholder="https://api.openai.com/v1" defaultValue="https://api.openai.com/v1" />
-            <CredentialField key={`${asrProvider}:model`} label={t('settings.providers.modelLabel')} account="asr.model"
+            <CredentialField key={`${asrProvider}:model:${asrModelRevision}`} label={t('settings.providers.modelLabel')} account="asr.model"
               placeholder="whisper-1" />
+            <ProviderTools kind="asr" modelAccount="asr.model" onModelSelected={() => setAsrModelRevision(v => v + 1)} />
           </>
         )}
       </Card>
@@ -383,6 +389,106 @@ function ProvidersSection() {
   );
 }
 
+type ProviderToolStatus = 'idle' | 'loading' | 'success' | 'empty' | 'error';
+
+function ProviderTools({ kind, modelAccount, onModelSelected }: { kind: 'llm' | 'asr'; modelAccount: string; onModelSelected: () => void }) {
+  const { t } = useTranslation();
+  const [models, setModels] = useState<string[]>([]);
+  const [selectedModel, setSelectedModel] = useState('');
+  const [status, setStatus] = useState<ProviderToolStatus>('idle');
+  const [message, setMessage] = useState('');
+
+  const setResult = (next: ProviderToolStatus, nextMessage: string) => {
+    setStatus(next);
+    setMessage(nextMessage);
+  };
+
+  const validate = async () => {
+    setModels([]);
+    setSelectedModel('');
+    setResult('loading', t('settings.providers.validating'));
+    try {
+      const result = await validateProviderCredentials(kind);
+      setResult(
+        result.ok ? (result.modelCount === 0 ? 'empty' : 'success') : 'error',
+        result.modelCount === 0
+          ? t('settings.providers.modelsEmpty')
+          : t('settings.providers.validateSuccess', { count: result.modelCount }),
+      );
+    } catch (error) {
+      setResult('error', providerErrorMessage(error, t));
+    }
+  };
+
+  const loadModels = async () => {
+    setResult('loading', t('settings.providers.loadingModels'));
+    try {
+      const result = await listProviderModels(kind);
+      setModels(result.models);
+      if (result.models.length === 0) {
+        setResult('empty', t('settings.providers.modelsEmpty'));
+      } else {
+        setSelectedModel('');
+        setResult('success', t('settings.providers.modelsLoaded', { count: result.models.length }));
+      }
+    } catch (error) {
+      setModels([]);
+      setResult('error', providerErrorMessage(error, t));
+    }
+  };
+
+  const applyModel = async (model: string) => {
+    setResult('loading', t('common.saving'));
+    try {
+      await setCredential(modelAccount, model);
+      setSelectedModel(model);
+      onModelSelected();
+      setResult('success', t('settings.providers.modelSaved', { model }));
+    } catch (error) {
+      setResult('error', providerErrorMessage(error, t));
+    }
+  };
+
+  return (
+    <SettingRow label={t('settings.providers.toolsLabel')} desc={t('settings.providers.toolsDesc')}>
+      <div style={{ display: 'flex', flexDirection: 'column', gap: 8, width: '100%', maxWidth: 420 }}>
+        <div style={{ display: 'flex', gap: 6, alignItems: 'center', flexWrap: 'wrap' }}>
+          <button onClick={validate} style={miniBtnStyle} disabled={status === 'loading'}>{t('settings.providers.validate')}</button>
+          <button onClick={loadModels} style={miniBtnStyle} disabled={status === 'loading'}>{t('settings.providers.fetchModels')}</button>
+          {models.length > 0 && (
+            <select
+              value={selectedModel}
+              onChange={e => applyModel(e.target.value)}
+              disabled={status === 'loading'}
+              style={{ ...inputStyle, maxWidth: 220 }}
+            >
+              <option value="" disabled>{t('settings.providers.selectModel')}</option>
+              {models.map(model => <option key={model} value={model}>{model}</option>)}
+            </select>
+          )}
+        </div>
+        {message && (
+          <span style={{ fontSize: 11, color: status === 'error' ? 'var(--ol-warn)' : status === 'empty' ? 'var(--ol-ink-4)' : 'var(--ol-ok)', lineHeight: 1.4 }}>
+            {message}
+          </span>
+        )}
+      </div>
+    </SettingRow>
+  );
+}
+
+
+function providerErrorMessage(error: unknown, t: ReturnType<typeof useTranslation>['t']): string {
+  const message = error instanceof Error ? error.message : String(error);
+  if (message.startsWith('providerHttpStatus:')) {
+    return t('settings.providers.providerHttpStatus', { status: message.split(':')[1] || '?' });
+  }
+  if (message.includes('API Key')) return t('settings.providers.apiKeyMissing');
+  if (message.includes('Endpoint')) return t('settings.providers.endpointMissing');
+  if (message.includes('timeout') || message.includes('超时')) return t('settings.providers.requestTimeout');
+  return t('common.operationFailed');
+}
+
 type CredentialFieldStatus = 'idle' | 'saving' | 'saved' | 'readError' | 'saveError' | 'copied' | 'copyError';
 
 interface CredentialFieldProps {
@@ -567,6 +673,15 @@ const inputStyle: CSSProperties = {
   width: '100%', maxWidth: 360,
   transition: 'background 0.12s ease-out, border-color 0.12s ease-out',
 };
+const miniBtnStyle: CSSProperties = {
+  height: 32, padding: '0 10px',
+  border: '0.5px solid var(--ol-line-strong)',
+  borderRadius: 8, background: 'var(--ol-surface)',
+  color: 'var(--ol-ink-2)', cursor: 'default', flexShrink: 0,
+  fontSize: 12, fontWeight: 500,
+  transition: 'background 0.12s ease-out, border-color 0.12s ease-out, color 0.12s ease-out',
+};
+
 const iconBtnStyle: CSSProperties = {
   width: 32, height: 32,
   border: '0.5px solid var(--ol-line-strong)',