OpenAI's Codex coding app is now available on Windows, a month after its Mac debut

OpenAI has released its standalone Codex app for Windows, bringing the same multi-agent coding experience that Mac users have had since early February. The company says the Mac version has already crossed one million downloads since launch—and with nearly half of all developers using Windows professionally, according to a 2025 Stack Overflow survey, the timing makes sense.

Codex on Windows goes native instead of leaning on WSL

Unlike a basic port, OpenAI says the Windows version is built for native Windows developer environments. That means native sandboxing and native workflows—so developers won't need to fall back on Windows Subsystem for Linux (WSL) or virtual machines just to keep things secure. The app lets developers command multiple agents working asynchronously across projects, delegate repeatable work using Automations, and extend what agents can do through Skills—bundles of instructions, resources, and scripts that connect agents to specific tools and workflows.

Skills are a big part of what makes Codex more than just a code generator. OpenAI has included a library of pre-built skills for tools like Figma, Linear, Vercel, and Cloudflare, and developers can create their own through a dedicated interface in the app. There's also a built-in Automations feature that lets Codex run tasks on a schedule in the background—think daily issue triage or CI failure summaries—with results landing in a review queue.

Session history syncs across Mac, Windows, CLI, and IDE

One practical touch: session history and configuration carry over across platforms. So if you start a project on Mac and switch to Windows, your context stays intact. The app also supports worktrees, letting multiple agents work on the same repo without stepping on each other's code.Codex is available to users on ChatGPT Free, Go, Plus, Pro, Business, Enterprise, and Edu plans. For a limited time, OpenAI is also doubling rate limits for existing paid users and opening up access to Free and Go accounts. The app can be downloaded from OpenAI's website and works across the app, CLI, IDE extension, and cloud with a single account.