Resolves to the time period in which this happens, dates inclusive.

Any model which is clearly the next major, canonical form of GPT will count for this market regardless of what it is called. I am assuming this will be called GPT-4.5 or GPT-5, but it still counts if it has another name. A larger context window does not count, a jump like GPT-3 to GPT-3.5 does count.

It must be released to the general public, though it can still be in open beta and it can still be behind a paywall or require a subscription.

I will continue adding later time periods as necessary, which will split from "Other". So bet on "Other" if you believe the release will be later than any current options.