Codex & Claude tools

Free small tools for usage-limit questions: work out reset odds, or check whether your weekly limit will last until the next reset.

• How reset odds are calculated

  How the 24-hour, 48-hour, and 7-day reset-probability numbers for Codex and Claude are calculated, with the current real sample size and probabilities.

• Weekly limit calculator

  Estimate whether your Codex or Claude weekly usage limit will last until the next reset, based on how you're using it right now.

• Model self-check questions

  8 fixed questions to run against Codex or Claude yourself and compare against a reference answer, if you suspect a model got worse.