Found from Bruce Shneier’s blog. This model is free, ad-free, privacy respecting, and likely to stay that way. If you or folks you know are heavily using GPT, and likely to be hurt when it starts introducing ads (and otherwise enshittifying) soon, do make sure they know there are alternatives like this.

This particular chat model uses a system prompt chosen by the swiss government, with the intention of providing LLM access as a public utility (like a library). I believe models are intentionally trained on ethical datasets (see the details of Aptertus here), with an effort towards sustainable energy use.