Skip to main content
Codex CLI requires Node.js and npm. After installation, run codex at least once to confirm Codex starts correctly.

​
1. Check Node.js

node --version
npm --version
If version numbers appear, Node.js and npm are installed. If Node.js is not installed, refer to the Node.js installation guide, then run the checks again.

​
2. Install Codex CLI

npm install -g @openai/codex@latest
Check the installed version: 
codex --version

​
3. Initialize Codex

codex
If the Codex chat UI, model information, or command hints appear, the installation succeeded. Codex started successfully