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Supported AI · OpenAI

What is Codex?

Codex is OpenAI's coding agent. It works in the ChatGPT desktop and mobile apps, on the web, in the Codex CLI and IDE extension, and in Codex Cloud. You can extend it with skills, folders of instructions for a task, and schedule tasks to run in the background. It is included in ChatGPT plans and shares usage with ChatGPT Work.

Last checked · Sources

See 1 recipe Open Codex (opens in a new tab)

Who can use it

  • ChatGPT plans, including Free
  • Also available with an API key
  • ChatGPT apps, CLI, IDE or Codex Cloud
  • Usage shared with ChatGPT Work

Codex at a glance

Each fact links to the page it comes from, with the day we last checked that page.

Codex facts, with their sources and the day we checked them
FactWhat the docs say
Where it runsChatGPT desktop and mobile apps, the web, the CLI, IDE extensions and Codex CloudSource: Codex documentation(opens in a new tab)Checked
Connect appsYour project files, skills and pluginsSource: Codex: build and install local skills(opens in a new tab)Checked
SchedulesYes: scheduled tasks that run in the backgroundSource: Scheduled tasks(opens in a new tab)Checked
PlanChatGPT plans or an API keySource: Codex access and usage(opens in a new tab)Checked
AvailabilityWhere ChatGPT is available; some features are limited by regionSource: Codex access and usage(opens in a new tab)Checked

What Codex can do

  • Coding tasks

    Codex builds features and tools, explains code and fixes failures in a project you choose.

    Example: Check a design handover folder and build an approved file list.

  • Skills

    Add a folder with a SKILL.md file to .agents/skills and Codex uses it for that kind of task.

    Example: A skill that formats release notes the same way every time.

  • Scheduled tasks

    Describe when a task should run and it runs in the background. Manage tasks and their runs in the Scheduled view.

    Example: Every Monday, check a project folder for missing files.

Get started with Codex

  1. Check your access: Codex is included in ChatGPT plans, with usage shared with ChatGPT Work.
  2. Open Codex in the ChatGPT desktop app, the Codex CLI or the IDE extension, and sign in with your ChatGPT account.
  3. Create a practice folder and start a task in it.
  4. Pick a recipe and paste its setup prompt, or add a skill from the list below by following the skills guide.
  5. Review every file change and result before you keep it.

What to check before you trust it

  • Start in a practice folder or a copy of your files.
  • Review every change before you keep it.
  • Check which tools and plugins a task can reach before you schedule it.
  • Longer tasks use more of your shared ChatGPT usage, so check your limits before a big batch.

We have not run these setups ourselves. Recipes are written from public Codex documentation, and their examples are illustrative.

Recipes built with Codex (1)

A recipe is a step-by-step setup you build in Codex yourself. Each one shows what you provide, what you get, and a setup prompt to copy. Examples are illustrative, not recorded results.

Skills you can add to Codex (70)

A skill is a folder of instructions that Codex can use for a specific task. Add it once, then ask for the task in your own words.

How to add skills to Codex

  • Sales call follow-up

    Turn call notes into a recap email that promises only what was agreed, proposed CRM changes and a task list with owners and dates.

    • Codex
    • Claude Code
    • Claude app
    • OpenClaw
    • Hermes Agent

  • Account reconciliation

    Compare accounting records with a clear audit trail, separate uncertain matches, and explain remaining differences.

    • Codex
    • Claude Code
    • OpenClaw
    • Hermes Agent

  • Research synthesis

    Combine supplied sources into a clear answer that preserves evidence, disagreement, and uncertainty.

    • Codex
    • Claude Code
    • OpenClaw
    • Hermes Agent

  • Document field extraction

    Extract requested fields into a source-linked table without guessing missing or unreadable values.

    • Codex
    • Claude Code
    • OpenClaw
    • Hermes Agent

  • Prospect fit research

    Check a named company against your customer criteria and return a sourced fit brief.

    • Codex
    • Claude Code
    • OpenClaw
    • Hermes Agent

  • Business process documentation

    Turn team notes into a repeatable process with clear owners, decisions, exceptions, and completion checks.

    • Codex
    • Claude Code
    • OpenClaw
    • Hermes Agent

  • AI job search

    Find current job openings, drop duplicates and expired posts, and shortlist them against your must-haves and real experience.

    • Codex
    • Claude Code
    • Claude app
    • OpenClaw
    • Hermes Agent

  • Applicant tracker from email

    Log job applications from Gmail or Outlook in a Google Sheet or CSV, and see which applicants are waiting for your reply.

    • Codex
    • Claude Code
    • OpenClaw
    • Hermes Agent

  • Article-to-Visuals

    Map an approved article to a cover, three illustrations and an optional six-card carousel, exported as editable SVG, PNG and PDF files.

    • Codex
    • Claude Code
    • OpenClaw
    • Hermes Agent

  • Audio edit plan

    Create a cut and keep plan from a transcript while protecting the speaker’s meaning.

    • Codex
    • Claude Code
    • OpenClaw
    • Hermes Agent

  • Budget versus actual review

    Compare budget and actual figures on the same basis and explain only supported differences.

    • Codex
    • Claude Code
    • OpenClaw
    • Hermes Agent

  • Bug diagnosis

    Trace a failure to its first broken invariant, test competing causes and verify a minimal authorized fix.

    • Codex
    • Claude Code
    • OpenClaw
    • Hermes Agent
Browse all 70 skills

Questions about Codex

Is Codex only for programmers?
It is built for coding tasks, but it can work with any files in a project folder. The recipes here use it for tasks such as checking a design handover.
Is Codex free?
Codex is included in ChatGPT Free, Go, Plus, Pro, Business, Edu and Enterprise plans and shares usage limits with ChatGPT Work. It is also available with an API key at API rates.
What is the difference between Codex and ChatGPT Work?
Both are included in ChatGPT plans and share usage. Codex focuses on code and project files; ChatGPT Work handles tasks such as briefs, analyses and recurring updates.
How do I add skills to Codex?
Create a folder with a SKILL.md file in .agents/skills in your project or home folder. Our Codex skills guide walks through it.
Can Codex run tasks on a schedule?
Yes. Scheduled tasks run in the background, and you manage them and their runs in the Scheduled view.

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Sources

The pages behind Codex’s facts and setup steps, with the day we last checked each one.

All sources (4)
Codex pricing and product details

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