I recently dug into this as I was trying to benchmark the possibility of using Gemini Nano (Chrome's built in AI model) vs a server side solution for a sideproject.

Nano's stored in localstorage with shared access across sites (because Google), so users only need to download it once. Which I don't think is the case with Mistral, etc.

There's some other production stats around adoption, availability and performance that were interesting as well:

https://sendcheckit.com/blog/ai-powered-subject-line-alterna...