This guy tested it: https://she-llac.com/claude-limits
"Suspiciously precise floats, or, how I got Claude's real limits" 19hs ago 25 points https://news.ycombinator.com/item?id=46756742
OTOH, with ChatGPT/Codex limits are less of a problem, in general.
Because Codex effectively rate limits you by being so slow.