Codex

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?01End-to-end coding agentHandles features, refactors and migrations from start to finish02Multi-agent workflowsWork trees and cloud environments run several projects in parallel03Skills for team standardsSkills let Codex match team conventions on code, prototypes and docs04AutomationsRuns unattended for issue triage, alert watch and CI/CD05PR reviewsReviews pull requests and surfaces hard-to-spot bugs06Same agent across surfacesUse Codex in app, IDE, terminal and web with one ChatGPT account07CLInpm install @openai/codex to continue work from the terminal08macOS desktop appDownload the Codex desktop app for macOSUse 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 CodexPricingChatGPT Plus/ProContact salesas of Apr 18, 2026 — may be outdatedView official pricing Domain RatingDR 93Domain Rating by AhrefsLicensePlatformsWeb·CLI·APIFrequently Asked Questions1.Who makes Codex?2.Where can I use Codex?3.Can Codex run long background jobs?4.How do I install the Codex CLI?5.Is there a free credit for teams?6.Can Codex review pull requests?Sponsor

Codex Traffic Analysis

Alternatives to CodexLooking for a Codex alternative? Compare these curated AI tools that offer similar features and use cases.Claude CodeClaude Code is Anthropic's agentic coding assistant that operates in the terminal, IDE extensions, and GitHub, using Claude models to plan, edit, and execute multi-file changes across a codebase.GitHub CopilotGitHub Copilot is an AI pair programmer developed by GitHub and OpenAI. It provides inline code completion, Copilot Chat, pull request review, and agentic workspace features across VS Code, JetBrains, Visual Studio, Neovim, and GitHub.com.CursorCursor is an AI-first code editor forked from VS Code, adding Tab completion, Composer multi-file agents, inline chat, and a codebase-aware assistant that can plan, edit, and review code across large projects.

What can Codex do?