[yk]

Interesting question, continuing on this, since they probably used GPL-3 code with the Affero clause, do they have to open source GPT? (The Affero clause is I believe the more directly applicable license thingy, though CC by-sa should also work.)

https://www.gnu.org/licenses/agpl-3.0.en.html

[guilhas]

I think all the code license question does not matter much, because the code is data input, not a part of their actual program

Like githubs servers host AGPL code as data, without having to be open-source

The perceived problem there, is if their model generates an exact copy of some AGPL code, and you use it in your project unknowingly, and then you get can sued