Yes. From when they started talking about model welfare:
> As a vegetarian I have strong opinions on this sort of thing. Everyone at Anthropic better be ethical vegans if they are claiming to give a shit about “model welfare”. It’s hard enough right now to make people care about the welfare of trans people and immigrants let alone animals _let alone_ math.
If we're talking about slavery, though, that doesn't even matter.
The happiest, best cared for horse owned by a vegan is still enslaved.