OpenAI Codex

What it is for

OpenAI Codex is a coding agent on ChatGPT plans: the official app still (see the cover: sidebar New chat / Projects, composer What should we build?, Explore / Review) is the same agent you open in the desktop app, CLI, IDE extension, or chatgpt.com/codex. Use it when the job is a reviewable coding session on an OpenAI account.

License is hosted commercial. Free prints $0/month. Plus is the first public paid card that lists the full Codex surface set.

What makes it unique: the cover is OpenAI’s own Codex app chrome — projects rail plus “What should we build?” — from the official Codex docs, a product window rather than a marketing hero.

Key features

• Codex app workspace — Projects rail and a first-task composer in the desktop/web app (Projects).
• Codex Cloud — a published environment keeps a task running after you close the laptop (Cloud).
• GitHub code review — automatic or @codex review comments on a pull request (GitHub).
• Slack hand-off — mention @Codex in a channel to start a cloud task and get the result in-thread (Slack).
• Scheduled tasks — recurring or Gmail / Slack / GitHub event runs; the CLI has no Scheduled inbox (Scheduled tasks).

Who it's for

Best fit: developers already on a ChatGPT plan who want one agent across desktop, CLI, and GitHub review.

Pricing

Verified 2026-10-22 (Asia/Shanghai) from the live cards on learn.chatgpt.com/docs/pricing (same copy as developers.openai.com/codex/pricing). Displayed dollars can vary by region at checkout.

• Free — $0/month. GPT-6 Luna at Standard speed in the desktop app (rollout).
• Go — $8/month. GPT-6 Luna at Standard speed in the desktop app (rollout).
• Plus — $20/month. Codex on web, CLI, IDE, and iOS; cloud review + Slack; GPT-6.1 Sol and GPT-6 Luna; extra ChatGPT credits.
• Pro — $100/month entry, with $200 and $500 cards. Ultrafast on Pro $500.
• Business — $25 / user / month billed monthly; 2+ users billed annually on that footnote.
• Enterprise / Edu — custom. API-key usage follows API pricing.
• Desktop Voice — $0.05 / minute on the same page.

Plus local-message estimates / 5 hours: GPT-6.1 Sol 15–160; GPT-6 Luna 350–3,000.

Limitations / costs

• Codex and ChatGPT Work share the same usage pool on that Pricing article.
• Cloud review and Slack sit on ChatGPT-signed-in cards; the API-key row bills tokens only.
• Go and Free list Luna in the desktop app while Plus lists the full surface set.
• GPT-5.5 ChatGPT-sign-in retirement is dated 14 Oct 2026 on the same page.

Alternatives

• Cursor — repo-local Agent/Tab editor with published seat cards.
• Cline — Apache-2.0 IDE sidebar that runs on your own keys.
• GitHub Copilot — completions and Chat inside GitHub’s IDE SKUs.

Official tutorial

Official OpenAI channel video: A first look at the Codex app (oEmbed author: OpenAI).

Written path: Codex Pricing plus Quickstart.

Website

https://learn.chatgpt.com/docs

Source

Catalog row curated for AI Tools Nav. Cover is OpenAI’s official Codex app still (Projects rail + “What should we build?”). Dollars checked on learn.chatgpt.com/docs/pricing (Free $0; Go $8; Plus $20; Pro $100+; Business $25/user/mo). Tutorial: A first look at the Codex app on @OpenAI (oEmbed).

Last verified

2026-10-22 (Asia/Shanghai) editorial check.