Context: Random twitter person (who is followed by ChatGPT official account) claims something big will happen in an hour. https://x.com/iruletheworldmo/status/1819161723250921976

I will resolve according to my subjective assessment of "bigness". I will count both major releases OR announcements of major releases (e.g. GPT-5, real-time voice, etc).

I will not be that strict with timing. If there's a release any time before 7ish pm PT, that will count.