If model training is determined to be fair use under US copyright law—either legislated by Congress or interpreted by Federal courts—then no license text can remove the right to use source code that way.

> then no license text can remove the right to use source code that way.

At least in the US.

Quite what happens if another country ordered, say chatGPT, to be released under the AGPL since it was trained on AGPL code, who knows.