This is a hard core well defined market.
Names that count, with symbolic regex
GPT-4.5
gpt-4.5 (we ignore case)
GPT-4.5[a-z]{1,1} (single character suffixes allowed)
GPT-4.5[other single symbols]{1,1}, e.g. gpt-4.5[smiley face emoji]
ignoring case, so gpt-4.5 would also count, as would GpT-4.5X
gpt-4.5 (where the - is a special rare "unicode dash") and similar. These count because for the human perception system, they still appear to be "gpt-4.5"
gpt-4.5, but they tell us that it's pronounced gpt-fawty-five. This counts because the text is still gpt-4.5
Things that would not count
gpt-45 (no dot)
GPT45 (no dash)
GPT4-5 (wrong dash location)
gpt-445 (extra stuff)
gpt-4.55 (yes, its an extra char, but it appears to break the required "4.5" as the numerical part)
gpt-5
gpt-5.4
Unlike my other markets, this is a hard core market where I'm going to try to judge based on predefined rules as much as possible.
It would be so funny if you closed this market on July 1st, and then on July 2nd, before 12pm in this market's timezone, OpenAI releases "GPT-4.5" - and then you have to have a debate about the unclear semantics of "mid 2025."
Not at all likely to actually be a problem, but it would be very funny if it happened anyway.
@Ernie Hmm, did I figure it wrong? I think ~182.5 days into 2025 falls roughly on July 2nd around noon.
https://www.quora.com/Whats-the-exact-halfway-point-of-the-year
(Some people discussing it here.)
"At the end of the 6th month of 2025" also works for "mid."