diff --git a/routes/model_routes.py b/routes/model_routes.py
index 3f2cb7d4e0..646ac40179 100644
--- a/routes/model_routes.py
+++ b/routes/model_routes.py
@@ -342,6 +342,10 @@ def _rewrite_loopback_for_docker(base_url: str, *, container_local: bool = False
     "deepseek": [
         "deepseek-chat", "deepseek-reasoner",
     ],
+    "atlascloud": [
+        "qwen/qwen3.5-flash",
+        "deepseek-ai/deepseek-v4-pro",
+    ],
     "groq": [
         "openai/gpt-oss-120b", "openai/gpt-oss-20b",
         "groq/compound", "groq/compound-mini",
@@ -381,6 +385,7 @@ def _rewrite_loopback_for_docker(base_url: str, *, container_local: bool = False
 # inside an unrelated URL.
 _HOST_TO_CURATED = (
     ("z.ai", "zai"),
+    ("atlascloud.ai", "atlascloud"),
     ("deepseek.com", "deepseek"),
     ("groq.com", "groq"),
     ("mistral.ai", "mistral"),
diff --git a/src/llm_core.py b/src/llm_core.py
index af1958f16f..5b5530f27e 100644
--- a/src/llm_core.py
+++ b/src/llm_core.py
@@ -1001,6 +1001,7 @@ def _provider_label(url: str) -> str:
     if _host_match(url, "ollama.com"): return "Ollama Cloud"
     if _host_match(url, "x.ai"): return "xAI"
     if _host_match(url, "openai.com"): return "OpenAI"
+    if _host_match(url, "atlascloud.ai"): return "Atlas Cloud"
     if _host_match(url, "openrouter.ai"): return "OpenRouter"
     if _host_match(url, "opencode.ai/zen/go"): return "OpenCode Go"
     if _host_match(url, "opencode.ai/zen"): return "OpenCode Zen"
diff --git a/static/js/providers.js b/static/js/providers.js
index 54556faebc..ba1bb69d1c 100644
--- a/static/js/providers.js
+++ b/static/js/providers.js
@@ -110,6 +110,7 @@ const _ENDPOINT_LABELS = [
   [/(^|\.)openrouter\.ai$/i, "OpenRouter"],
   [/(^|\.)anthropic\.com$/i, "Anthropic"],
   [/(^|\.)openai\.com$/i, "OpenAI"],
+  [/(^|\.)atlascloud\.ai$/i, "Atlas Cloud"],
   [/(^|\.)(generativelanguage|aiplatform)\.googleapis\.com$/i, "Google"],
   [/(^|\.)bedrock[\w.-]*\.amazonaws\.com$/i, "AWS Bedrock"],
   [/(^|\.)deepseek\.com$/i, "DeepSeek"],
diff --git a/static/js/slashCommands.js b/static/js/slashCommands.js
index cabb7d32b1..7f68b43ee6 100644
--- a/static/js/slashCommands.js
+++ b/static/js/slashCommands.js
@@ -56,11 +56,12 @@ const SETUP_PROVIDER_URLS = {
   groq: { name: 'Groq', url: 'https://api.groq.com/openai/v1' },
   gemini: { name: 'Gemini', url: 'https://generativelanguage.googleapis.com/v1beta/openai' },
   google: { name: 'Gemini', url: 'https://generativelanguage.googleapis.com/v1beta/openai' },
+  atlascloud: { name: 'Atlas Cloud', url: 'https://api.atlascloud.ai/v1' },
   'opencode-zen': { name: 'OpenCode Zen', url: 'https://opencode.ai/zen/v1' },
   'opencode-go': { name: 'OpenCode Go', url: 'https://opencode.ai/zen/go/v1' },
   nvidia: { name: 'NVIDIA', url: 'https://integrate.api.nvidia.com/v1' },
 };
-const SETUP_PROVIDER_NAMES = ['deepseek', 'openai', 'openrouter', 'ollama', 'xai', 'anthropic', 'groq', 'gemini', 'opencode-zen', 'opencode-go', 'nvidia'];
+const SETUP_PROVIDER_NAMES = ['deepseek', 'openai', 'openrouter', 'ollama', 'xai', 'anthropic', 'groq', 'gemini', 'atlascloud', 'opencode-zen', 'opencode-go', 'nvidia'];
 const SETUP_DEVICE_AUTH_PROVIDERS = [
   { key: 'copilot', name: 'GitHub Copilot', aliases: ['github'], command: '/setup copilot' },
   { key: 'chatgpt-subscription', name: 'ChatGPT Subscription', aliases: ['chatgptsubscription', 'chatgpt-sub', 'codex'], command: '/setup chatgpt-subscription' },
@@ -100,6 +101,9 @@ function _setupProviderFromInput(input) {
     google: 'gemini',
     xai: 'xai',
     grok: 'xai',
+    atlas: 'atlascloud',
+    atlascloud: 'atlascloud',
+    atlascloudai: 'atlascloud',
     nvidia: 'nvidia',
     opencodezen: 'opencode-zen',
     opencodego: 'opencode-go',
@@ -130,6 +134,7 @@ function _extractSetupProviderCredential(input) {
     ['groq', 'groq'],
     ['google', 'gemini'], ['gemini', 'gemini'],
     ['x ai', 'xai'], ['xai', 'xai'], ['grok', 'xai'],
+    ['atlas cloud', 'atlascloud'], ['atlascloud', 'atlascloud'], ['atlas', 'atlascloud'],
     ['nvidia', 'nvidia'],
     ['opencode zen', 'opencode-zen'], ['opencode-zen', 'opencode-zen'],
     ['opencode go', 'opencode-go'], ['opencode-go', 'opencode-go'],
@@ -5864,6 +5869,7 @@ const COMMANDS = {
       groq:       { help: 'Groq',          usage: '/setup groq gsk_...',        handler: (a, c) => _cmdSetup(['groq',       ...a], c) },
       gemini:     { help: 'Google Gemini', alias: ['google'], usage: '/setup gemini AIza...', handler: (a, c) => _cmdSetup(['gemini', ...a], c) },
       xai:        { help: 'xAI (Grok)',    alias: ['grok'],   usage: '/setup xai xai-...',   handler: (a, c) => _cmdSetup(['xai',    ...a], c) },
+      atlascloud: { help: 'Atlas Cloud',    alias: ['atlas'],  usage: '/setup atlascloud KEY', handler: (a, c) => _cmdSetup(['atlascloud', ...a], c) },
       ollama:     { help: 'Ollama Cloud',  usage: '/setup ollama KEY',          handler: (a, c) => _cmdSetup(['ollama',     ...a], c) },
       copilot:    { help: 'GitHub Copilot', usage: '/setup copilot',            handler: (a, c) => _cmdSetup(['copilot',    ...a], c) },
       'chatgpt-subscription': { help: 'ChatGPT Subscription', alias: ['codex'], usage: '/setup chatgpt-subscription', handler: (a, c) => _cmdSetup(['chatgpt-subscription', ...a], c) },
diff --git a/tests/test_model_routes.py b/tests/test_model_routes.py
index d413820c58..3eaec17a5c 100644
--- a/tests/test_model_routes.py
+++ b/tests/test_model_routes.py
@@ -184,6 +184,9 @@ def test_url_match_overrides_provider(self):
     def test_deepseek_url(self):
         assert _match_provider_curated("https://api.deepseek.com/v1", "openai") == "deepseek"
 
+    def test_atlascloud_url(self):
+        assert _match_provider_curated("https://api.atlascloud.ai/v1", "openai") == "atlascloud"
+
     def test_groq_url(self):
         assert _match_provider_curated("https://api.groq.com/openai/v1", "openai") == "groq"
 
@@ -341,6 +344,12 @@ def test_deepseek_curated(self):
         assert "deepseek-reasoner" in curated
         assert "deepseek-coder" in extra
 
+    def test_atlascloud_curated(self):
+        models = ["deepseek-ai/deepseek-v4-pro", "custom-atlas-model", "qwen/qwen3.5-flash"]
+        curated, extra = _curate_models(models, "atlascloud")
+        assert curated == ["qwen/qwen3.5-flash", "deepseek-ai/deepseek-v4-pro"]
+        assert extra == ["custom-atlas-model"]
+
     def test_xai_curated(self):
         models = ["grok-4", "grok-3-fast", "grok-2"]
         curated, extra = _curate_models(models, "xai")
diff --git a/tests/test_provider_classification.py b/tests/test_provider_classification.py
index 62c713e31a..ac890f62d0 100644
--- a/tests/test_provider_classification.py
+++ b/tests/test_provider_classification.py
@@ -45,6 +45,7 @@ class TestDetectProvider:
         ("https://api.openai.com/v1", "openai"),
         ("https://api.x.ai/v1", "openai"),
         ("https://api.deepseek.com", "openai"),
+        ("https://api.atlascloud.ai/v1", "openai"),
         ("https://generativelanguage.googleapis.com/v1beta/openai", "openai"),
         # Ollama's OpenAI-compatible /v1 surface is generic, not native ollama.
         ("http://localhost:11434/v1", "openai"),
@@ -79,6 +80,7 @@ class TestProviderLabel:
         ("https://ollama.com", "Ollama Cloud"),
         ("https://api.x.ai/v1", "xAI"),
         ("https://api.openai.com/v1", "OpenAI"),
+        ("https://api.atlascloud.ai/v1", "Atlas Cloud"),
         ("https://openrouter.ai/api/v1", "OpenRouter"),
         ("https://api.groq.com/openai/v1", "Groq"),
         ("https://integrate.api.nvidia.com/v1", "NVIDIA"),
diff --git a/tests/test_provider_endpoints_headers.py b/tests/test_provider_endpoints_headers.py
index dc7bc5da20..ce73701896 100644
--- a/tests/test_provider_endpoints_headers.py
+++ b/tests/test_provider_endpoints_headers.py
@@ -24,6 +24,7 @@ def test_headers_anthropic_without_key_still_sends_version():
 
 @pytest.mark.parametrize("base", [
     "https://api.openai.com/v1",
+    "https://api.atlascloud.ai/v1",
     "https://api.x.ai/v1",
     "https://api.deepseek.com",
     "https://api.groq.com/openai/v1",
diff --git a/tests/test_provider_endpoints_url_building.py b/tests/test_provider_endpoints_url_building.py
index 56d129e1c3..f08c5c2e29 100644
--- a/tests/test_provider_endpoints_url_building.py
+++ b/tests/test_provider_endpoints_url_building.py
@@ -28,6 +28,9 @@ def no_dns(monkeypatch):
     ("openai_pathless", "https://api.openai.com",
      "https://api.openai.com/v1/chat/completions",
      "https://api.openai.com/v1/models"),
+    ("atlascloud", "https://api.atlascloud.ai/v1",
+     "https://api.atlascloud.ai/v1/chat/completions",
+     "https://api.atlascloud.ai/v1/models"),
     ("anthropic", "https://api.anthropic.com",
      "https://api.anthropic.com/v1/messages",
      "https://api.anthropic.com/v1/models"),
diff --git a/tests/test_provider_label_js.py b/tests/test_provider_label_js.py
index 39b1a1f5dc..f0e5fac52b 100644
--- a/tests/test_provider_label_js.py
+++ b/tests/test_provider_label_js.py
@@ -47,6 +47,7 @@ def _provider_label(url: str) -> str | None:
     ("http://localhost:9999/v1",      "Local"),
     # Known remote provider hosts are still labeled by host suffix.
     ("https://api.openai.com/v1",     "OpenAI"),
+    ("https://api.atlascloud.ai/v1",  "Atlas Cloud"),
     ("https://api.groq.com/openai/v1","Groq"),
     ("http://192.168.1.50:8080",      "Local"),      # private LAN: no port branding
 ])
diff --git a/tests/test_slash_setup_provider_aliases.py b/tests/test_slash_setup_provider_aliases.py
index 0e50c7c48a..a09795b994 100644
--- a/tests/test_slash_setup_provider_aliases.py
+++ b/tests/test_slash_setup_provider_aliases.py
@@ -25,5 +25,10 @@ def test_opencode_setup_provider_aliases_resolve():
 const goCredential = _extractSetupProviderCredential('opencode go sk-test');
 assert(goCredential && goCredential.provider.name === 'OpenCode Go', 'opencode go credential provider failed');
 assert(goCredential.credential === 'sk-test', 'opencode go credential extraction failed');
-"""
+const atlasFromCommand = _setupProviderFromInput('atlas cloud');
+assert(atlasFromCommand && atlasFromCommand.url === 'https://api.atlascloud.ai/v1', 'atlas cloud command alias failed');
+const atlasCredential = _extractSetupProviderCredential('atlascloud sk-test');
+assert(atlasCredential && atlasCredential.provider.name === 'Atlas Cloud', 'atlascloud credential provider failed');
+assert(atlasCredential.credential === 'sk-test', 'atlascloud credential extraction failed');
+    """
     subprocess.run(["node", "-e", script], check=True)