All the OpenAI model names look like garbled nonsense to the layperson, while Anthropic is a bit of a mixed bag too. I'm not sure what image Claude is supposed to conjure, Sonnet is a nice name if it's packaged as a creative writing tool but less so for developers. Meta AI is at least to the point, though not particularly interesting as far as names go.

Gemini is kind of cool sounding, aiming for the associations of playful/curious of that zodiac sign. And the Gemini models are about as unreliable as astrology is for practical use, so I guess that name makes the most sense.