As recorded at collection: ChatGPT (Plus / Pro), a total of 6 weeks' worth per month

This method takes advantage of how upgrading from Plus to Pro requires paying only the difference for the remaining subscription period while the weekly limit is replenished. It is explained using an average month of 30 days (4 weeks + 2 days), securing more usage than with consecutive renewals. The stated usage is one week of Plus and five weeks of Pro, for a total of 6 weeks.

First subscribe to Plus and use up all the allowance for that week, then upgrade to Pro. At that point, you pay only the difference for the remaining subscription period, and the weekly limit is replenished. The later you upgrade, the smaller the difference, so if it takes two days to use up the Plus allowance, the cost of Pro is reduced accordingly. The post says you can keep getting the same benefit each month by repeating the process with a new account instead of renewing immediately after Pro expires.

Comments also mention upgrading to Pro one day before Plus expires, paying only the one-day difference, and using the entire one-week Pro allowance in a single day. This is an example for situations where you want to do a lot of work in one focused day, and the poster mentioned it as a joke. All these methods assume that the ChatGPT 5-hour usage limit is not in effect, so their effectiveness may change if the limit returns.