News Meta to deploy custom-designed Artemis AI processor alongside commercial GPUs

Does Meta work with any design house for this Artemis processor?
According to this, the CPU cores in their 1st generation silicon are RISC-V cores licensed from Andes:

However, it's pretty clear that the backend processing elements aren't from Andes. So, those would either be in-house or licensed from elsewhere.

That article doesn't cover details of the new silicon, at least in the non-subscriber "free" section.