OpenAI Codex Free: how much usage do you really get?

GPT-6 Luna at Standard speed in the desktop app, subject to rollout.

How limits work: Codex and ChatGPT Work share one allowance. OpenAI publishes estimated local messages per 5-hour window for Plus (not fixed limits); weekly limits may also apply.

Source: developers.openai.com/codex/pricing · checked 2026-10-29

Weekly “who changed limits” recap

One email a week: every price, plan or limit change across AI coding tools, with sources. No spam.