Codex CLI
OpenAI's open-source Rust coding agent that edits repos and runs code in a sandboxed terminal session.
About
Codex CLI is OpenAI's terminal-native coding agent: a Rust binary that reads your repository, proposes and applies edits, and executes commands inside a sandbox, with configurable approval modes ranging from suggest-only to full auto. The Rust implementation (the codex-rs workspace) keeps startup fast and drops the Node runtime dependency of early releases, though npm remains an install path alongside Homebrew, direct binary downloads from GitHub Releases, and shell installers for macOS, Linux, and Windows. Authentication works by signing in with a ChatGPT Plus, Pro, Business, Edu, or Enterprise account, or by supplying an OpenAI API key with extra setup, and the same agent surfaces through IDE extensions for VS Code, Cursor, and Windsurf plus a hosted version at chatgpt.com/codex. The code is fully open under Apache-2.0, with about 102,000 GitHub stars and an active contributor community that OpenAI supports through an open-source fund. Documentation, build guides, and configuration references live at developers.openai.com/codex.
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Details
- Category
- AI Code Assistants
- Price
- Free
- Platform
- Local/Desktop
- Difficulty
- Easy (2/5)
- License
- Apache-2.0
- Added
- Jul 29, 2026
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