I too can't compose iambic trimeters in ancient Greek but am normally regarded as of average+ intelligence. I think it's a bit of an unfair test as that sort of thing is based of the rhythm of spoken speech and GPT-5 doesn't really deal with audio in a deep way.
Most classicists today can’t actually speak Latin or Greek, especially observing vowel quantities and rhythm properly, but you’d be hard pressed to find one who can’t scan poetry with pen and paper. It’s a very simple application of rules to written characters on a page, but it is application, and AI still doesn’t apply concepts well.
