Tibo Sottiaux of OpenAI’s Codex team set out the usage limits on the company’s Pro plans in a post on X on 8 November. Sottiaux wrote of having seen some confusion about the plans.

A five-hour limit is a usage limit that caps how much of the service a user can consume in a five-hour window. Once it is reached, the user has to wait for the next window. Sottiaux said no Pro tier has such a limit.

Usage is still not unlimited. Sottiaux gave each Pro tier’s usage as a multiple of Plus usage: Pro 100 gives 10 times, Pro 200 20 times and Pro 500 50 times the usage of Plus. The post does not say how usage is measured or over what period the multiples are calculated.

Pro 500 also includes access to an ultrafast option, which Sottiaux does not describe further in the post.

Later the same day, Sottiaux asked followers whether a Pro 50 tier would make sense. ‘Wdyt?’ Sottiaux wrote. This was a question, not an announced plan.