How about Google itself?

https://developer.chrome.com/docs/ai/prompt-api

>With the Prompt API, you can send natural language requests to Gemini Nano in the browser.

Thanks. Looks like the current Gemini Nano is actually a separate model with the Gemma 3n architecture that has been distilled from Gemini 2.5 Flash[1].

Also, the next version of Gemini Nano will be based directly on Gemma 4 (so not distilled, not Gemini at all except for the name)[2].

So no, it's not a frontier model. Those don't run on your phone or in your browser.

[1]: https://developer.android.com/blog/posts/ml-kit-s-prompt-api...

[2]: https://android-developers.googleblog.com/2026/04/AI-Core-De...