Codex CLI

OpenAI's lightweight terminal-based coding agent built in Rust, supporting both ChatGPT authentication and API keys with Model Context Protocol extensibility.

Codex CLI is OpenAI's command-line coding agent, built in Rust for performance and portability. It supports both ChatGPT account authentication and direct API keys, integrates with VS Code, Cursor, and Windsurf, and includes Model Context Protocol support for extensibility. Developer reviews describe it as more deterministic on multi-step tasks than alternatives, making it suitable for workflows requiring reliable follow-through on sequential operations.

Also known as