For a while now, Splice’s Create feature has been capable of picking a stack of compatible loops based on one of your choosing, but only from the company’s own catalogue of sounds. That changes from today, as you can now use your own loop as the sonic starting point.
Drag in a loop that you’ve been working on from your DAW (or anywhere else, for that matter) and Splice Create will quickly analyse its properties and use its AI powers to pull in a bunch of compatible sounds. The loops themselves are created by humans, of course - all the AI is doing is selecting ones that fit with what you’ve already got.