Guide
Codex Guide
How Codex works as a work partner — from plain-language requests to files you can ship.
A partner, not just chat
Codex takes assignments end-to-end. You describe the outcome; it plans, builds files, runs commands, checks results, and revises. That can mean a PDF report, a cleaned dataset, a slide deck, a web page, or production code.
Cloud and local
Cloud Codex in ChatGPT is the fastest start — no install. Local Codex in your IDE is best when work lives in folders on your machine and you want tight iteration.
Free to try
Codex is available on ChatGPT's free plan with usage limits — enough to experience a true work partner before upgrading.