Amazon Q Developer
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OpenAI Codex
Visit OpenAI Codex →OpenAI's coding agent. Codex works in a desktop app, on the web, in a CLI, in IDE extensions and on iOS, can run tasks in cloud sandboxes, and reviews GitHub pull requests.
Our take
Last updated 26 October 2026
Codex is OpenAI's coding agent. It runs in a desktop app, on the web, in a terminal CLI and in IDE extensions, can work on tasks in cloud sandboxes, and can review GitHub pull requests when you tag @codex. It comes with ChatGPT plans rather than a separate subscription: Free and Go ($8 a month) get the desktop app, Plus ($20) adds the web, CLI, IDE and cloud code review, and Pro runs $100 to $500 a month for heavier use. You can also pay API rates with an API key.
Best for Game developers who already use ChatGPT and want an agent for gameplay scripts, tools and PR reviews.
Pros
- Included in ChatGPT plans you may already pay for.
- Works in a terminal, IDE, desktop app or cloud sandbox.
- Automatic GitHub pull request reviews on Plus and above.
Cons
- Usage limits are estimates that vary by model and task size.
- Cloud features (code review, Slack) are not available with an API key.
- Like any agent, its changes to engine code and scenes need careful review.
Written from the vendor's official site and docs, not a hands-on benchmark. How we review tools.
| Category | Code & Engines |
|---|---|
| Pricing | Included with ChatGPT plans: Free $0 and Go $8/mo (desktop app, lighter model); Plus $20/mo (web, CLI, IDE, cloud code review); Pro $100, $200 or $500/mo; Business $25/user/mo billed monthly; or pay API rates with an API key — official pricing |
| Website | https://chatgpt.com/codex/ |
| Last checked | 2026-11-04 |
Description summarized from OpenAI's official Codex docs; pricing from the official Codex pricing page.
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