Open-Less · Cooper-X-Oak · May 1, 2026
diff --git a/openless-all/app/src-tauri/src/coordinator.rs b/openless-all/app/src-tauri/src/coordinator.rs
@@ -34,6 +34,11 @@ use crate::types::{
     HotkeyStatusState, InsertStatus, PolishMode,
 };
 
+const DEFAULT_LLM_PROVIDER_ID: &str = "deepseek";
+const DEFAULT_LLM_PROVIDER_NAME: &str = "DeepSeek";
+const DEFAULT_LLM_BASE_URL: &str = "https://api.deepseek.com/v1";
+const DEFAULT_LLM_MODEL_ID: &str = "deepseek-v4-flash";
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 enum SessionPhase {
     Idle,
@@ -1492,22 +1497,7 @@ async fn polish_text(
     working_languages: &[String],
     front_app: Option<&str>,
 ) -> anyhow::Result<String> {
-    let api_key = CredentialsVault::get(CredentialAccount::ArkApiKey)?.unwrap_or_default();
-    if api_key.is_empty() {
-        anyhow::bail!("ark api key missing");
-    }
-    let model = CredentialsVault::get(CredentialAccount::ArkModelId)?
-        .filter(|s| !s.is_empty())
-        .unwrap_or_else(|| "deepseek-v3-2".to_string());
-    let endpoint = CredentialsVault::get(CredentialAccount::ArkEndpoint)?
-        .filter(|s| !s.is_empty())
-        .unwrap_or_else(|| "https://ark.cn-beijing.volces.com/api/v3/chat/completions".to_string());
-    let base_url = endpoint
-        .trim_end_matches("/chat/completions")
-        .trim_end_matches('/')
-        .to_string();
-
-    let config = OpenAICompatibleConfig::new("ark", "Doubao Ark", base_url, api_key, model);
+    let config = read_llm_config()?;
     let provider = OpenAICompatibleLLMProvider::new(config);
     Ok(provider
         .polish(raw, mode, hotwords, working_languages, front_app)
@@ -1537,22 +1527,7 @@ async fn translate_text(
     working_languages: &[String],
     front_app: Option<&str>,
 ) -> anyhow::Result<String> {
-    let api_key = CredentialsVault::get(CredentialAccount::ArkApiKey)?.unwrap_or_default();
-    if api_key.is_empty() {
-        anyhow::bail!("ark api key missing");
-    }
-    let model = CredentialsVault::get(CredentialAccount::ArkModelId)?
-        .filter(|s| !s.is_empty())
-        .unwrap_or_else(|| "deepseek-v3-2".to_string());
-    let endpoint = CredentialsVault::get(CredentialAccount::ArkEndpoint)?
-        .filter(|s| !s.is_empty())
-        .unwrap_or_else(|| "https://ark.cn-beijing.volces.com/api/v3/chat/completions".to_string());
-    let base_url = endpoint
-        .trim_end_matches("/chat/completions")
-        .trim_end_matches('/')
-        .to_string();
-
-    let config = OpenAICompatibleConfig::new("ark", "Doubao Ark", base_url, api_key, model);
+    let config = read_llm_config()?;
     let provider = OpenAICompatibleLLMProvider::new(config);
     Ok(provider
         .translate_to(raw, target_language, working_languages, front_app)
@@ -2031,25 +2006,35 @@ async fn answer_chat_dispatch<F>(
 where
     F: Fn(&str) + Send + Sync,
 {
+    let config = read_llm_config()?;
+    let provider = OpenAICompatibleLLMProvider::new(config);
+    Ok(provider
+        .answer_chat_streaming(messages, working_languages, front_app, on_delta)
+        .await?)
+}
+
+fn read_llm_config() -> anyhow::Result<OpenAICompatibleConfig> {
     let api_key = CredentialsVault::get(CredentialAccount::ArkApiKey)?.unwrap_or_default();
     if api_key.is_empty() {
-        anyhow::bail!("ark api key missing");
+        anyhow::bail!("llm api key missing");
     }
     let model = CredentialsVault::get(CredentialAccount::ArkModelId)?
         .filter(|s| !s.is_empty())
-        .unwrap_or_else(|| "deepseek-v3-2".to_string());
+        .unwrap_or_else(|| DEFAULT_LLM_MODEL_ID.to_string());
     let endpoint = CredentialsVault::get(CredentialAccount::ArkEndpoint)?
         .filter(|s| !s.is_empty())
-        .unwrap_or_else(|| "https://ark.cn-beijing.volces.com/api/v3/chat/completions".to_string());
+        .unwrap_or_else(|| DEFAULT_LLM_BASE_URL.to_string());
     let base_url = endpoint
         .trim_end_matches("/chat/completions")
         .trim_end_matches('/')
         .to_string();
-    let config = OpenAICompatibleConfig::new("ark", "Doubao Ark", base_url, api_key, model);
-    let provider = OpenAICompatibleLLMProvider::new(config);
-    Ok(provider
-        .answer_chat_streaming(messages, working_languages, front_app, on_delta)
-        .await?)
+    Ok(OpenAICompatibleConfig::new(
+        DEFAULT_LLM_PROVIDER_ID,
+        DEFAULT_LLM_PROVIDER_NAME,
+        base_url,
+        api_key,
+        model,
+    ))
 }
 
 #[cfg(test)]

diff --git a/openless-all/app/src-tauri/src/persistence.rs b/openless-all/app/src-tauri/src/persistence.rs
@@ -162,7 +162,7 @@ fn creds_default_asr() -> String {
     "volcengine".into()
 }
 fn creds_default_llm() -> String {
-    "ark".into()
+    "deepseek".into()
 }
 
 #[derive(Debug, Serialize, Deserialize, Default, Clone)]

diff --git a/openless-all/app/src-tauri/src/types.rs b/openless-all/app/src-tauri/src/types.rs
@@ -131,7 +131,7 @@ impl Default for UserPreferences {
             launch_at_login: false,
             show_capsule: true,
             active_asr_provider: "volcengine".into(),
-            active_llm_provider: "ark".into(),
+            active_llm_provider: "deepseek".into(),
             restore_clipboard_after_paste: true,
             working_languages: default_working_languages(),
             translation_target_language: String::new(),

diff --git a/openless-all/app/src/lib/ipc.ts b/openless-all/app/src/lib/ipc.ts
@@ -43,7 +43,7 @@ const mockSettings: UserPreferences = {
   launchAtLogin: false,
   showCapsule: true,
   activeAsrProvider: 'volcengine',
-  activeLlmProvider: 'ark',
+  activeLlmProvider: 'deepseek',
   restoreClipboardAfterPaste: true,
   workingLanguages: ['简体中文'],
   translationTargetLanguage: '',
@@ -148,7 +148,7 @@ export function validateProviderCredentials(kind: 'llm' | 'asr'): Promise<Provid
 }
 
 export function listProviderModels(kind: 'llm' | 'asr'): Promise<ProviderModelsResult> {
-  return invokeOrMock('list_provider_models', { kind }, () => ({ models: kind === 'llm' ? ['gpt-4o', 'deepseek-chat'] : ['whisper-1'] }));
+  return invokeOrMock('list_provider_models', { kind }, () => ({ models: kind === 'llm' ? ['deepseek-v4-flash', 'deepseek-v4-pro', 'gpt-4o'] : ['whisper-1'] }));
 }
 
 // ── History ────────────────────────────────────────────────────────────

diff --git a/openless-all/app/src/lib/llmPresets.test.ts b/openless-all/app/src/lib/llmPresets.test.ts
@@ -0,0 +1,29 @@
+import {
+  DEFAULT_LLM_PRESET_ID,
+  LLM_PRESETS,
+} from './llmPresets';
+
+function assertEqual<T>(actual: T, expected: T, name: string) {
+  if (actual !== expected) {
+    throw new Error(`${name}: expected ${expected}, got ${actual}`);
+  }
+}
+
+function assert(condition: boolean, name: string) {
+  if (!condition) {
+    throw new Error(name);
+  }
+}
+
+const presetIds: string[] = LLM_PRESETS.map(preset => preset.id);
+assertEqual(DEFAULT_LLM_PRESET_ID, 'deepseek', 'DeepSeek is the default LLM preset');
+assert(!presetIds.includes('ark'), 'Ark is not exposed as an LLM preset');
+
+const deepSeek = LLM_PRESETS.find(preset => preset.id === 'deepseek');
+assert(!!deepSeek, 'DeepSeek preset exists');
+assertEqual(deepSeek?.baseUrl, 'https://api.deepseek.com/v1', 'DeepSeek uses the official base URL');
+assertEqual(
+  deepSeek?.modelPlaceholder,
+  'deepseek-v4-flash',
+  'DeepSeek default model tracks the current API model name',
+);
diff --git a/openless-all/app/src/lib/llmPresets.ts b/openless-all/app/src/lib/llmPresets.ts
@@ -0,0 +1,30 @@
+export const DEFAULT_LLM_PRESET_ID = 'deepseek';
+
+export const LLM_PRESETS = [
+  {
+    id: 'deepseek',
+    nameKey: 'deepseek',
+    baseUrl: 'https://api.deepseek.com/v1',
+    modelPlaceholder: 'deepseek-v4-flash',
+  },
+  {
+    id: 'siliconflow',
+    nameKey: 'siliconflow',
+    baseUrl: 'https://api.siliconflow.cn/v1',
+    modelPlaceholder: 'Qwen/Qwen2.5-7B-Instruct',
+  },
+  {
+    id: 'openai',
+    nameKey: 'openai',
+    baseUrl: 'https://api.openai.com/v1',
+    modelPlaceholder: 'gpt-4o',
+  },
+  {
+    id: 'custom',
+    nameKey: 'custom',
+    baseUrl: '',
+    modelPlaceholder: '',
+  },
+] as const;
+
+export type LlmPresetId = typeof LLM_PRESETS[number]['id'];
diff --git a/openless-all/app/src/pages/Settings.tsx b/openless-all/app/src/pages/Settings.tsx
@@ -9,6 +9,7 @@ import { isDialogStatus, UpdateDialog, useAutoUpdate } from '../components/AutoU
 import { APP_VERSION_LABEL } from '../lib/appVersion';
 import { isHotkeyModeMigrationNoticeActive } from '../lib/hotkeyMigration';
 import { getHotkeyStartStopLabel, getHotkeyTriggerLabel } from '../lib/hotkey';
+import { DEFAULT_LLM_PRESET_ID, LLM_PRESETS, type LlmPresetId } from '../lib/llmPresets';
 import {
   checkAccessibilityPermission,
   checkMicrophonePermission,
@@ -262,16 +263,6 @@ function Toggle({ on, onToggle }: { on: boolean; onToggle?: (next: boolean) => v
   );
 }
 
-const LLM_PRESETS = [
-  { id: 'ark',          nameKey: 'ark',         baseUrl: 'https://ark.cn-beijing.volces.com/api/v3', modelPlaceholder: 'deepseek-v3-2' },
-  { id: 'deepseek',     nameKey: 'deepseek',    baseUrl: 'https://api.deepseek.com/v1',             modelPlaceholder: 'deepseek-chat' },
-  { id: 'siliconflow',  nameKey: 'siliconflow', baseUrl: 'https://api.siliconflow.cn/v1',           modelPlaceholder: 'Qwen/Qwen2.5-7B-Instruct' },
-  { id: 'openai',       nameKey: 'openai',      baseUrl: 'https://api.openai.com/v1',               modelPlaceholder: 'gpt-4o' },
-  { id: 'custom',       nameKey: 'custom',      baseUrl: '',                                        modelPlaceholder: '' },
-] as const;
-
-type LlmPresetId = typeof LLM_PRESETS[number]['id'];
-
 const ASR_DEFAULT_RESOURCE_ID = 'volc.bigasr.sauc.duration';
 
 // SiliconFlow ASR 暂未在后端实现（coordinator.rs 只路由 whisper / volcengine）。
@@ -286,7 +277,7 @@ type AsrPresetId = typeof ASR_PRESETS[number]['id'];
 function ProvidersSection() {
   const { t } = useTranslation();
   const { prefs, updatePrefs } = useHotkeySettings();
-  const [llmProvider, setLlmProvider] = useState<LlmPresetId>('ark');
+  const [llmProvider, setLlmProvider] = useState<LlmPresetId>(DEFAULT_LLM_PRESET_ID);
   const [asrProvider, setAsrProvider] = useState<AsrPresetId>('volcengine');
   const [llmModelRevision, setLlmModelRevision] = useState(0);
   const [asrModelRevision, setAsrModelRevision] = useState(0);