› In Codex settings, under Usage and billing, there’s a sentence worth reading twice: “Shared limit for Codex, Work mode, workspace agents, and ChatGPT for Excel.
› Chat conversations don’t count toward it.” Below it is a weekly usage bar.
› I have a Pro plan, and on the first day the bar showed 100%.
› A few hours later, while looking through a configuration file, I found a setting that had quietly been using up that limit two and a half times faster for weeks.That setting was Fast mode.