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.