Paid · Included with ChatGPT Plus $20/mo or API usage
ChatGPT Codex
OpenAI's coding agent.
- What is ChatGPT Codex?
- ChatGPT Codex is OpenAI's software engineering agent, available as a terminal CLI, an IDE extension, and a cloud agent in ChatGPT.
- What does it do?
- Reads a repository, writes and edits code, runs commands and tests, and proposes changes as pull requests. The cloud version runs tasks in sandboxed containers in parallel; the CLI works locally against your checkout.
- Who is it for?
- Developers and engineering teams already working in OpenAI's ecosystem who want an agent to handle refactors, bug fixes, and routine pull requests.
- What are the alternatives to ChatGPT Codex?
- Claude Code is Anthropic's terminal agent; Cursor and Windsurf are AI-first editors; Aider, Cline, and OpenCode are open-source agents you point at your own model.
Pricing
Included with ChatGPT Plus $20/mo or API usage
Paid
Alternatives to ChatGPT Codex
Tools that solve the same problem as ChatGPT Codex, including the ones it's listed against.
Anthropic's agentic coding tool in your terminal.
Included with Claude Pro $20/mo or API usage