I've been using You ai for a while now.
you.com
The founder is German-born Richard Socher
https://www.socher.org/
Scroll down and there is a video with an interveiw of him. I find him grounded and sympathetic.
I am impressed by how the AI manages to do everything from telling me who owns a company to the correct spelling of egregious.

What impressed me most today was that it actually translated the Norwegian "makeskifte" correctly to "exchange". It is, in fact, a legal concept where owners, often farmers, exchange one piece of property (land in their case) for another. Like-for-like, without any money changing hands, just property.
Google and Deepl both translated it to "wife swapping". This has caused quite a bit of consternatiotion for geneology researchers, as it often happens in inheritance settlements.

PS. Norwegian "makeskifte" has nothing to do with the English makeshift.