Install Codex CLI

Codex CLI is OpenAI's command-line coding agent. It can inspect code, edit files, and run commands directly from your terminal.

Prerequisites

• Get an API key from the LAYSO AI website ↗.
• Install Node.js ↗; Node.js 18 or later is recommended.
• Prepare a project directory for the first Codex test.

Install

Run the following command in a terminal:

npm install -g @openai/codex

IMAGE SLOT 01Install Codex CLI/screenshots/codex/01-install.pngRecommended 16:9 · 1600 × 900

Verify the installation

codex --version

A version number confirms that installation succeeded.

IMAGE SLOT 02Verify the installation/screenshots/codex/02-verify.pngRecommended 16:9 · 1600 × 900

Command not found

Run node --version and npm --version to confirm Node.js is installed. Reopen the terminal and make sure npm's global executable directory is included in PATH.

Update and uninstall

Update to the current npm release:

npm update -g @openai/codex
codex --version

Uninstall Codex when it is no longer needed:

npm uninstall -g @openai/codex

Next step

Continue to configure the Codex CLI model provider with the local ~/.codex/config.toml file.