OpenAI's coding agent, included with ChatGPT plans.
https://chatgpt.com/codex
OpenAI’s coding agent, included with ChatGPT plans.
With ChatGPT: limited on Free/Go, full on Plus $20/mo
Included in ChatGPT Free and Go (limited, desktop app), Plus $20/month (web, CLI, IDE extension, iOS, Codex cloud), Pro from $100/month, Business, Edu and Enterprise.
Prices checked on October 18, 2026. Source
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