OpenAI is expected to release a new flagship model called GPT-5 sometime this year or early next year, although Sam Altman has said that he's not sure if they'll actually call it GPT-5. 

This market will resolve based on the official, confirmed public release of that anticipated model. If it is not named GPT-5 then Altman/OpenAI must make it clear that it is the same anticipated model which everyone has been expecting to be called GPT-5. If this is not clear, a model not named GPT-5 will not count for this resolution.

 like the GPT2 chatbots put up on Chatbot Arena before the release of GPT-4o would not count for this market, and neither would something like the 

 of GPT-4 through Microsoft Azure. This market requires a broad, official release which is either free or available at a reasonable cost like through a GPT plus membership.

These exact resolution criteria may be updated to better match the spirit of the question, and your suggestions are welcome in the comments.

This market resolves to the month in which the release happens in Pacific Time, or to "January 2025 or later" if the release does not happen by then.