OpenAI brings Codex to Windows with native agent sandbox and parallel AI agents

A month after debuting on macOS, OpenAI Codex has arrived on Windows. The coding-focused AI tool is now available through the Microsoft Store, giving developers on Windows 10 and newer machines access to OpenAI’s agent-based software development environment.

The release brings the same core functionality first seen on macOS, including the ability to run multiple AI coding agents simultaneously, manage long-running development tasks, and review code changes within a single interface.

For developers who work primarily in Windows environments, the new version removes the need for workarounds such as virtual machines or the Windows Subsystem for Linux.

OpenAI Codex: A coding command centre powered by AI agents

At its core, the Codex app acts as a hub for what OpenAI calls agentic software development. Instead of prompting a single AI model for quick code snippets, users can deploy multiple agents across different parts of a project at once.

These agents can generate code, fix bugs, propose pull requests, and write tests across repositories. They can also collaborate in parallel, tackling different components of a larger task while the developer supervises progress.

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OpenAI says the Windows version includes a native agent sandbox and full support for Windows developer environments through PowerShell. That means developers can keep their existing workflows intact while letting AI agents handle repetitive or exploratory coding work.

The system is built on OpenAI’s Codex models, which are designed to translate natural language prompts into functional code across languages such as Python, JavaScript, and Go.

OpenAI Codex: Different tiers, different limits

Access to the Codex app is available across several subscription tiers. Users on free and Go plans can try the core functionality, though with lower usage limits. Higher tiers such as Plus, Pro, Business, Enterprise, and Edu unlock greater rate limits and additional capabilities.

The Windows release follows OpenAI’s push to position Codex less as a coding assistant and more as a collaborative software engineering system. One that behaves less like autocomplete and more like a small team of specialised developers working alongside you.

If you’re a developer, let us know if you will try out OpenAI’s Codex on Windows by dropping a comment below.