Codex
The best way to build with agents. Codex accelerates real engineering work, from planning and building features to refactors, reviews, and releases—working seamlessly across your tools.

TL;DR
- Codex completes engineering tasks end-to-end, including feature building, refactors, and migrations.
- It is designed for multi-agent workflows, allowing agents to work in parallel across projects.
- Skills enable Codex to contribute to code understanding, prototyping, and documentation, aligning with team standards.
- Automations allow Codex to work unprompted on tasks like issue triage, alert monitoring, and CI/CD.
- Codex improves code quality through thorough designs, comprehensive testing, and high-signal code review.
- It can be used across multiple surfaces, including the Codex app, editor, and terminal, all connected to a ChatGPT account.
- Limited-time offers include free access and double rate limits on other plans.