OpenAI has launched its Codex agentic coding application for Windows, expanding its reach beyond the Mac platform. The Mac version received over 1 million downloads in its first week and currently has 1.6 million weekly active users, with over 500,000 developers awaiting the Windows version. The Windows version is designed for real-world usage, featuring native sandboxing capabilities and OS-level controls for secure operation. It includes a WinUI skill for Windows application development and mirrors the Mac version in functionality while introducing Windows-specific features. Codex emphasizes managing the agent over just coding, providing a unique interface described as a "command center for agents." It operates on OpenAI’s latest coding model, GPT-5.3-Codex, with options to switch to earlier versions and adjust reasoning levels. Codex for Windows is available to users across various tiers, including ChatGPT Free, Go, Plus, Pro, Business, Enterprise, and Edu.