diff --git a/README.md b/README.md
index 2183d8a..595230f 100644
--- a/README.md
+++ b/README.md
@@ -149,6 +149,7 @@ windows-use
 |--------------|-----------------------------------------------|
 | Anthropic    | `from windows_use.providers.anthropic import ChatAnthropic` |
 | OpenAI       | `from windows_use.providers.openai import ChatOpenAI`       |
+| Atlas Cloud  | `from windows_use.providers.atlas_cloud import ChatAtlasCloud` |
 | Google       | `from windows_use.providers.google import ChatGoogle`       |
 | Groq         | `from windows_use.providers.groq import ChatGroq`           |
 | Ollama       | `from windows_use.providers.ollama import ChatOllama`       |
@@ -161,6 +162,14 @@ windows-use
 | NVIDIA       | `from windows_use.providers.nvidia import ChatNvidia`       |
 | vLLM         | `from windows_use.providers.vllm import ChatVLLM`           |
 
+Atlas Cloud uses its OpenAI-compatible API and reads `ATLAS_CLOUD_API_KEY` by default:
+
+```python
+from windows_use.providers.atlas_cloud import ChatAtlasCloud
+
+llm = ChatAtlasCloud(model="openai/gpt-4.1-mini")
+```
+
 ## 🧰 Agent Configuration
 
 ```python
diff --git a/tests/unit/providers/test_atlas_cloud.py b/tests/unit/providers/test_atlas_cloud.py
new file mode 100644
index 0000000..ed201b8
--- /dev/null
+++ b/tests/unit/providers/test_atlas_cloud.py
@@ -0,0 +1,41 @@
+from unittest.mock import patch
+
+from windows_use.cli.registry import (
+    get_models,
+    get_provider_display,
+    get_providers,
+    provider_requires_api_key,
+)
+from windows_use.providers.atlas_cloud import ChatAtlasCloud
+from windows_use.providers.atlas_cloud.llm import ATLAS_CLOUD_BASE_URL
+
+
+@patch("windows_use.providers.openai.llm.AsyncOpenAI")
+@patch("windows_use.providers.openai.llm.OpenAI")
+def test_atlas_cloud_defaults(mock_openai, mock_async_openai, monkeypatch):
+    monkeypatch.setenv("ATLAS_CLOUD_API_KEY", "atlas-key")
+
+    llm = ChatAtlasCloud()
+
+    assert llm.provider == "atlas_cloud"
+    assert llm.model_name == "openai/gpt-4.1-mini"
+    assert llm.base_url == ATLAS_CLOUD_BASE_URL
+    mock_openai.assert_called_once_with(
+        api_key="atlas-key",
+        base_url=ATLAS_CLOUD_BASE_URL,
+        timeout=600.0,
+        max_retries=2,
+    )
+    mock_async_openai.assert_called_once_with(
+        api_key="atlas-key",
+        base_url=ATLAS_CLOUD_BASE_URL,
+        timeout=600.0,
+        max_retries=2,
+    )
+
+
+def test_atlas_cloud_is_available_in_cli_registry():
+    assert ("Atlas Cloud", "atlas_cloud") in get_providers()
+    assert get_models("atlas_cloud") == [("OpenAI GPT-4.1 mini", "openai/gpt-4.1-mini")]
+    assert get_provider_display("atlas_cloud") == "Atlas Cloud"
+    assert provider_requires_api_key("atlas_cloud") is True
diff --git a/windows_use/cli/registry.py b/windows_use/cli/registry.py
index 0081c6f..9ebe266 100644
--- a/windows_use/cli/registry.py
+++ b/windows_use/cli/registry.py
@@ -11,6 +11,7 @@
 PROVIDERS: list[tuple[str, str]] = [
     ("Groq", "groq"),
     ("OpenAI", "openai"),
+    ("Atlas Cloud", "atlas_cloud"),
     ("Anthropic", "anthropic"),
     ("Google", "google"),
     ("Ollama", "ollama"),
@@ -54,6 +55,9 @@
         ("GPT-4 Turbo", "gpt-4-turbo"),
         ("GPT-3.5 Turbo", "gpt-3.5-turbo"),
     ],
+    "atlas_cloud": [
+        ("OpenAI GPT-4.1 mini", "openai/gpt-4.1-mini"),
+    ],
     "perplexity": [
         ("GPT-5.4 (recommended)", "openai/gpt-5.4"),
         ("Gemini 3.1 Pro Preview", "google/gemini-3.1-pro-preview"),
@@ -174,6 +178,7 @@
 PROVIDERS_REQUIRING_API_KEY: set[str] = {
     "groq",
     "openai",
+    "atlas_cloud",
     "anthropic",
     "google",
     "mistral",
@@ -196,6 +201,7 @@ def provider_requires_api_key(provider_key: str) -> bool:
 PROVIDER_DISPLAY: dict[str, str] = {
     "groq": "Groq",
     "openai": "OpenAI",
+    "atlas_cloud": "Atlas Cloud",
     "anthropic": "Anthropic",
     "google": "Google",
     "ollama": "Ollama",
diff --git a/windows_use/cli/setup.py b/windows_use/cli/setup.py
index c37ceec..025bfed 100644
--- a/windows_use/cli/setup.py
+++ b/windows_use/cli/setup.py
@@ -367,6 +367,10 @@ def create_llm(provider: str, model: str, api_key: str | None = None, base_url:
         from windows_use.providers.openai import ChatOpenAI
 
         return ChatOpenAI(model=model, api_key=key, base_url=base_url)
+    if provider == "atlas_cloud":
+        from windows_use.providers.atlas_cloud import ChatAtlasCloud
+
+        return ChatAtlasCloud(model=model, api_key=key, base_url=base_url)
     if provider == "anthropic":
         from windows_use.providers.anthropic import ChatAnthropic
 
@@ -751,6 +755,7 @@ def _env_api_key_for_provider(provider: str) -> str | None:
     env_map = {
         "groq": "GROQ_API_KEY",
         "openai": "OPENAI_API_KEY",
+        "atlas_cloud": "ATLAS_CLOUD_API_KEY",
         "anthropic": "ANTHROPIC_API_KEY",
         "google": "GEMINI_API_KEY",  # or GOOGLE_API_KEY
         "mistral": "MISTRAL_API_KEY",
diff --git a/windows_use/providers/__init__.py b/windows_use/providers/__init__.py
index 36aebd5..1a0472e 100644
--- a/windows_use/providers/__init__.py
+++ b/windows_use/providers/__init__.py
@@ -14,6 +14,7 @@
 # Base protocols & data models
 # LLM providers
 from windows_use.providers.anthropic import ChatAnthropic
+from windows_use.providers.atlas_cloud import ChatAtlasCloud
 from windows_use.providers.azure_openai import ChatAzureOpenAI
 from windows_use.providers.base import BaseChatLLM, BaseSTT, BaseTTS
 from windows_use.providers.cerebras import ChatCerebras
@@ -73,6 +74,7 @@
     "ToolCall",
     # LLM providers
     "ChatAnthropic",
+    "ChatAtlasCloud",
     "ChatGoogle",
     "ChatOpenAI",
     "ChatOllama",
diff --git a/windows_use/providers/atlas_cloud/__init__.py b/windows_use/providers/atlas_cloud/__init__.py
new file mode 100644
index 0000000..803b5d7
--- /dev/null
+++ b/windows_use/providers/atlas_cloud/__init__.py
@@ -0,0 +1,3 @@
+from windows_use.providers.atlas_cloud.llm import ChatAtlasCloud
+
+__all__ = ["ChatAtlasCloud"]
diff --git a/windows_use/providers/atlas_cloud/llm.py b/windows_use/providers/atlas_cloud/llm.py
new file mode 100644
index 0000000..264fed0
--- /dev/null
+++ b/windows_use/providers/atlas_cloud/llm.py
@@ -0,0 +1,37 @@
+"""Atlas Cloud LLM provider via its OpenAI-compatible API."""
+
+import os
+
+from windows_use.providers.openai.llm import ChatOpenAI
+
+ATLAS_CLOUD_BASE_URL = "https://api.atlascloud.ai/v1"
+
+
+class ChatAtlasCloud(ChatOpenAI):
+    """Chat model served through Atlas Cloud's OpenAI-compatible endpoint."""
+
+    def __init__(
+        self,
+        model: str = "openai/gpt-4.1-mini",
+        api_key: str | None = None,
+        base_url: str | None = None,
+        timeout: float = 600.0,
+        max_retries: int = 2,
+        temperature: float | None = None,
+        **kwargs,
+    ):
+        api_key = api_key or os.environ.get("ATLAS_CLOUD_API_KEY")
+        base_url = base_url or os.environ.get("ATLAS_CLOUD_API_BASE") or ATLAS_CLOUD_BASE_URL
+        super().__init__(
+            model=model,
+            api_key=api_key,
+            base_url=base_url,
+            timeout=timeout,
+            max_retries=max_retries,
+            temperature=temperature,
+            **kwargs,
+        )
+
+    @property
+    def provider(self) -> str:
+        return "atlas_cloud"