OpenAI Codex CLI
lastmod 2026-04-17created 2025-04-184 edits
A lightweight coding agent that runs in the terminal
About
- OpenAI Codex is a lightweight coding agent that runs in the terminal, letting developers use ChatGPT-level reasoning, code execution, file manipulation, and version control from the terminal environment
- Codex requires no setup and runs safely with networking disabled and a directory sandbox
- Supports multimodal features, so you can implement features from screenshots or diagrams
- Codex is fully open source, with the advantage that developers can contribute to and improve it directly
- Runs on various operating systems, supporting macOS, Linux, and Windows WSL2
See also
- OpenAI
- Open Codex - Using OpenAI's Codex CLI with open-source LLMs
- ccusage - CLI tool for analyzing Claude Code/Codex usage
- Zerobox - Lightweight cross-platform process sandboxing tool based on the OpenAI Codex runtime