OpenAI Codex
OpenAI's coding agent for the web, CLI, IDE extension and desktop app, included with ChatGPT plans.
Free tier: Yes
Starting paid: ChatGPT Go $8/mo (lightweight tasks); Plus $20/mo; Pro from $100/mo; or pay-as-you-go with an API key
Checked 2026-10-24 · pricing source · prices change, confirm on the official site
Our take (editorial): Bundled with ChatGPT plans; Plus adds Codex on the web, CLI, IDE and iOS plus automatic code review and Slack integration. Not yet ranked in a tier list.
Last reviewed 2026-10-24
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