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Codex

One agent for everywhere you code—included in ChatGPT Plus, Pro, Business, Edu, and Enterprise plans.

Meet GPT-5.2-Codex, our latest frontier agentic coding model. Learn more.

Get started

Quickstart

Quickstart

 Prompting Codex

Prompting Codex

Work with Codex

Codex CLI

Codex CLI

Codex IDE Extension

Codex IDE Extension

Codex Cloud

Codex Cloud

Guides

Enterprise admin guide

Enterprise admin guide

Learn how to configure Codex for your ChatGPT Enterprise workspace
Cloud environments

Cloud environments

Customize dependencies and tools for Codex
Autofix CI failures with Codex

Autofix CI failures with Codex

Embed the Codex CLI into GitHub Actions so failed CI jobs trigger automatic fixes and reviewable pull requests.
Use Codex with the Agents SDK

Use Codex with the Agents SDK

Invoke Codex as an MCP server to build multi-agent development workflows
Use Codex in Slack

Use Codex in Slack

Ask @Codex to write code or answer questions directly in Slack
Use Codex in Linear

Use Codex in Linear

Assign issues to Codex or @mention it in comment threads
Agent internet access

Agent internet access

Control internet access for Codex cloud tasks

Videos