diff --git a/openless-all/app/src-tauri/src/commands/credentials.rs b/openless-all/app/src-tauri/src/commands/credentials.rs
index 305b0c91..c3764c9f 100644
--- a/openless-all/app/src-tauri/src/commands/credentials.rs
+++ b/openless-all/app/src-tauri/src/commands/credentials.rs
@@ -83,6 +83,7 @@ fn llm_provider_default_endpoint(provider: &str) -> Option<&'static str> {
         "ark" => Some("https://ark.cn-beijing.volces.com/api/v3"),
         "deepseek" => Some("https://api.deepseek.com/v1"),
         "siliconflow" => Some("https://api.siliconflow.cn/v1"),
+        "atlascloud" => Some("https://api.atlascloud.ai/v1"),
         "openai" => Some("https://api.openai.com/v1"),
         // 谷歌 Gemini 原生 API（v1beta）。后端 llm_gemini.rs 会拼成
         // `{baseUrl}/models/{model}:generateContent`，认证用 x-goog-api-key 头。
diff --git a/openless-all/app/src-tauri/src/commands/mod.rs b/openless-all/app/src-tauri/src/commands/mod.rs
index 0c4ea100..6c2cdadf 100644
--- a/openless-all/app/src-tauri/src/commands/mod.rs
+++ b/openless-all/app/src-tauri/src/commands/mod.rs
@@ -566,6 +566,22 @@ mod tests {
         ));
     }
 
+    #[test]
+    fn credentials_status_requires_api_key_for_atlascloud() {
+        let keyless = CredentialsSnapshot {
+            ark_endpoint: Some("https://api.atlascloud.ai/v1".into()),
+            ark_model_id: Some("qwen/qwen3.5-flash".into()),
+            ..snapshot()
+        };
+        assert!(!llm_configured_for_provider("atlascloud", &keyless));
+
+        let ready = CredentialsSnapshot {
+            ark_api_key: Some("key".into()),
+            ..keyless
+        };
+        assert!(llm_configured_for_provider("atlascloud", &ready));
+    }
+
     impl SettingsWriter for FakeSettingsWriter {
         fn read_settings(&self) -> UserPreferences {
             self.saved.lock().unwrap().clone().unwrap_or_default()
diff --git a/openless-all/app/src/i18n/en.ts b/openless-all/app/src/i18n/en.ts
index 6a2a5085..fa991d87 100644
--- a/openless-all/app/src/i18n/en.ts
+++ b/openless-all/app/src/i18n/en.ts
@@ -773,6 +773,7 @@ export const en: typeof zhCN = {
         ark: 'ARK (Volcengine Ark)',
         deepseek: 'DeepSeek',
         siliconflow: 'SiliconFlow',
+        atlascloud: 'Atlas Cloud',
         openai: 'OpenAI',
         gemini: 'Google Gemini',
         codexOAuth: 'Codex OAuth',
diff --git a/openless-all/app/src/i18n/ja.ts b/openless-all/app/src/i18n/ja.ts
index 0347a7c5..5ffe9144 100644
--- a/openless-all/app/src/i18n/ja.ts
+++ b/openless-all/app/src/i18n/ja.ts
@@ -775,6 +775,7 @@ export const ja: typeof zhCN = {
         ark: 'ARK（Volcengine Ark）',
         deepseek: 'DeepSeek',
         siliconflow: 'SiliconFlow',
+        atlascloud: 'Atlas Cloud',
         openai: 'OpenAI',
         gemini: 'Google Gemini',
         codexOAuth: 'Codex OAuth',
diff --git a/openless-all/app/src/i18n/ko.ts b/openless-all/app/src/i18n/ko.ts
index 23aaf5f1..711bf372 100644
--- a/openless-all/app/src/i18n/ko.ts
+++ b/openless-all/app/src/i18n/ko.ts
@@ -775,6 +775,7 @@ export const ko: typeof zhCN = {
         ark: 'ARK (Volcengine Ark)',
         deepseek: 'DeepSeek',
         siliconflow: 'SiliconFlow',
+        atlascloud: 'Atlas Cloud',
         openai: 'OpenAI',
         gemini: 'Google Gemini',
         codexOAuth: 'Codex OAuth',
diff --git a/openless-all/app/src/i18n/zh-CN.ts b/openless-all/app/src/i18n/zh-CN.ts
index 55087fe1..9031a922 100644
--- a/openless-all/app/src/i18n/zh-CN.ts
+++ b/openless-all/app/src/i18n/zh-CN.ts
@@ -771,6 +771,7 @@ export const zhCN = {
         ark: 'ARK（火山方舟）',
         deepseek: 'DeepSeek',
         siliconflow: '硅基流动',
+        atlascloud: 'Atlas Cloud',
         openai: 'OpenAI',
         gemini: 'Google Gemini',
         codexOAuth: 'Codex OAuth',
diff --git a/openless-all/app/src/i18n/zh-TW.ts b/openless-all/app/src/i18n/zh-TW.ts
index 882c4844..13a8e610 100644
--- a/openless-all/app/src/i18n/zh-TW.ts
+++ b/openless-all/app/src/i18n/zh-TW.ts
@@ -773,6 +773,7 @@ export const zhTW: typeof zhCN = {
         ark: 'ARK（火山方舟）',
         deepseek: 'DeepSeek',
         siliconflow: '硅基流動',
+        atlascloud: 'Atlas Cloud',
         openai: 'OpenAI',
         gemini: 'Google Gemini',
         codexOAuth: 'Codex OAuth',
diff --git a/openless-all/app/src/pages/Overview.tsx b/openless-all/app/src/pages/Overview.tsx
index 7aa2784d..4d9b845f 100644
--- a/openless-all/app/src/pages/Overview.tsx
+++ b/openless-all/app/src/pages/Overview.tsx
@@ -36,6 +36,7 @@ const LLM_NAME_KEY_BY_ID: Record<string, string> = {
   ark: 'ark',
   deepseek: 'deepseek',
   siliconflow: 'siliconflow',
+  atlascloud: 'atlascloud',
   openai: 'openai',
   codex_oauth: 'codexOAuth',
   mimo: 'mimo',
diff --git a/openless-all/app/src/pages/settings/ProvidersSection.test.ts b/openless-all/app/src/pages/settings/ProvidersSection.test.ts
new file mode 100644
index 00000000..b828b1f0
--- /dev/null
+++ b/openless-all/app/src/pages/settings/ProvidersSection.test.ts
@@ -0,0 +1,15 @@
+import { LLM_PRESETS } from './ProvidersSection';
+
+const atlascloudPreset = LLM_PRESETS.find(p => p.id === 'atlascloud');
+
+if (!atlascloudPreset) {
+  throw new Error('Atlas Cloud LLM preset is missing');
+}
+
+if (atlascloudPreset.baseUrl !== 'https://api.atlascloud.ai/v1') {
+  throw new Error(`unexpected Atlas Cloud base URL: ${atlascloudPreset.baseUrl}`);
+}
+
+if (atlascloudPreset.modelPlaceholder !== 'qwen/qwen3.5-flash') {
+  throw new Error(`unexpected Atlas Cloud default model: ${atlascloudPreset.modelPlaceholder}`);
+}
diff --git a/openless-all/app/src/pages/settings/ProvidersSection.tsx b/openless-all/app/src/pages/settings/ProvidersSection.tsx
index db2cc303..59280b2c 100644
--- a/openless-all/app/src/pages/settings/ProvidersSection.tsx
+++ b/openless-all/app/src/pages/settings/ProvidersSection.tsx
@@ -47,7 +47,7 @@ function LlmThinkingToggle({ enabled, onToggle }: { enabled: boolean; onToggle:
   );
 }
 
-const LLM_PRESETS = [
+export const LLM_PRESETS = [
   {
     id: 'ark',
     nameKey: 'ark',
@@ -66,6 +66,12 @@ const LLM_PRESETS = [
     baseUrl: 'https://api.siliconflow.cn/v1',
     modelPlaceholder: 'Qwen/Qwen2.5-7B-Instruct',
   },
+  {
+    id: 'atlascloud',
+    nameKey: 'atlascloud',
+    baseUrl: 'https://api.atlascloud.ai/v1',
+    modelPlaceholder: 'qwen/qwen3.5-flash',
+  },
   {
     id: 'openai',
     nameKey: 'openai',