# Codex

> OpenAI's coding agent that fixes bugs, refactors code, builds features and reviews pull requests in parallel

Source: https://dontaskagain.com/codex
Website: https://openai.com/codex/?utm_source=dontaskagain
Pricing: Paid
Categories: [Coding agents](https://dontaskagain.com/categories/coding-agents.md), [Code review](https://dontaskagain.com/categories/code-review.md)
Listed: 2026-10-27
Updated: 2026-10-27

Codex is OpenAI's software engineering agent. It takes on bugs, refactors and new features, runs many agents in parallel, and checks its own work with computer and browser tools until the requirements are met.

**Key features:**

- Run multiple agents in parallel and steer or review them in one place.
- Verify changes using computer and browser tools.
- Keep tasks running in the cloud with reusable environments for every repository.
- Review pull requests automatically, surfacing findings and answering questions.
- Connect other tools and add capabilities with plugins.
- Use the same agent in the ChatGPT app, on the web, in an IDE extension or in the CLI.

The Codex CLI installs with npm, and all surfaces share a ChatGPT account. Codex is included in ChatGPT plans: Plus at $20/month, Pro at $100/month for higher limits, and Business at $20 per user per month (2+ seats, billed annually) with a shared workspace and admin controls.

## More coding agents

- [Claude Code](https://dontaskagain.com/claude-code.md): Anthropic's coding agent that reads your codebase, edits files, runs commands and handles long tasks from your terminal
- [Cursor](https://dontaskagain.com/cursor.md): AI code editor and CLI whose agents write, test and demo features, running in parallel on their own cloud machines
- [Devin](https://dontaskagain.com/devin.md): Autonomous software engineer that writes code, tests it in its own browser and VMs, and iterates until the PR can merge
- [GitHub Copilot](https://dontaskagain.com/github-copilot.md): GitHub's coding agent that completes code, edits files in agent mode and takes assigned issues to open pull requests
- [Replit Agent](https://dontaskagain.com/replit.md): App builder whose Agent turns a prompt into a working, hosted web or mobile app with database and auth built in
- [Cline](https://dontaskagain.com/cline.md): Open-source coding agent for desktop, IDE, CLI and SDK that plans, edits files and runs terminal commands with any model
- [Factory](https://dontaskagain.com/factory.md): Platform of Droid coding agents that plan, build, review and validate software changes across desktop, terminal and web
- [Amp](https://dontaskagain.com/amp.md): Coding agent that runs each task in its own cloud environment and keeps working after you close your laptop
- [Jules](https://dontaskagain.com/jules.md): Google's asynchronous coding agent that clones your GitHub repo to a cloud VM, makes changes and opens a pull request
- [Kiro](https://dontaskagain.com/kiro.md): Agentic IDE and CLI from AWS that turns prompts into specs, then plans and implements the code with parallel agents