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Codex

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OpenAI coding agent that pairs with you in the terminal, in ChatGPT, and on GitHub to write, review, and ship code.

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AI Code Generator

What is Codex?#

Codex is OpenAI's cloud software engineering agent. It pairs with developers in the terminal, inside ChatGPT, and on GitHub to understand codebases, write and edit code, run tests, and open pull requests. Available to ChatGPT Plus, Pro, Business, and Enterprise users and via the open-source Codex CLI.

What can Codex do?#

  • 01

    End-to-end coding agent

    Handles features, refactors and migrations from start to finish

  • 02

    Multi-agent workflows

    Work trees and cloud environments run several projects in parallel

  • 03

    Skills for team standards

    Skills let Codex match team conventions on code, prototypes and docs

  • 04

    Automations

    Runs unattended for issue triage, alert watch and CI/CD

  • 05

    PR reviews

    Reviews pull requests and surfaces hard-to-spot bugs

  • 06

    Same agent across surfaces

    Use Codex in app, IDE, terminal and web with one ChatGPT account

  • 07

    CLI

    npm install @openai/codex to continue work from the terminal

  • 08

    macOS desktop app

    Download the Codex desktop app for macOS

Use Cases#

  • Software engineers — Hand off a refactor or feature to Codex and get tested code back end to end.
  • Engineering leaders — Use skills to enforce team code standards across prototypes, PRs and docs.
  • DevOps and on-call — Let Codex automations triage issues, watch alerts and maintain CI/CD pipelines.
  • Code reviewers — Run Codex PR reviews to catch tricky bugs before merge.
  • Mobile engineers — Use Codex in IDE or CLI to cut early iteration time on features.

Quick facts about Codex#

Pricing
ChatGPT Plus/ProContact sales
as of Apr 18, 2026View official pricing
Platforms
Web·CLI·API

Frequently Asked Questions#

Codex Traffic Analysis

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