OpenAI has released a Windows version of its Codex agentic coding application, expanding the reach of the AI powered development tool beyond its initial Mac launch earlier this year. The company said the Windows release was designed specifically for native Windows developer environments rather than simply adapting the Mac version.
Codex has seen strong adoption since its debut. According to OpenAI, the Mac version surpassed one million downloads within its first week and now has about 1.6 million weekly active users. Interest in the Windows release also appears significant, with more than 500,000 developers joining the waitlist ahead of the launch.
The application acts as an AI driven development assistant that manages coding agents capable of performing tasks such as generating code, modifying repositories, and automating workflows. OpenAI describes the interface as a command center for agents rather than a traditional coding environment. Developers can monitor agent activity, review code changes, and switch to external development tools when needed.
Designed for Native Windows Workflows
OpenAI said the Windows version was built to integrate with existing Windows developer workflows. The app includes native sandboxing capabilities that allow agents to operate securely within Windows environments while limiting system access.
By default, Codex uses the built in Windows sandbox and applies operating system level security controls such as restricted tokens and file system access management. These safeguards allow AI agents to run commands within environments like PowerShell, Microsoft’s default command shell.
Developers can also configure Codex to run within the Windows Subsystem for Linux environment, enabling access to Linux based developer tools while maintaining the application’s AI agent capabilities.
The Windows release largely mirrors the Mac version in terms of features. It supports automated coding skills, repository worktrees, and the ability to manage multiple tasks through AI agents. Some Windows specific capabilities are included as well, such as support for WinUI development workflows used in Windows application development.
AI Models and Developer Access
Codex for Windows runs primarily on OpenAI’s GPT-5.3-Codex model, which is optimized for software development tasks. Developers can switch between other models depending on the requirements of a task, including GPT-5.2-Codex, GPT-5.1-Codex-Max, and GPT-5.1-Codex-Mini for faster operations. Users can also adjust the reasoning level applied by the model.
The Windows version is available to all ChatGPT users across Free, Go, Plus, Pro, Business, Enterprise, and Education tiers.
