Grok is significantly the most biased. Did you sleep through its continuous insertion of made up stuff about south africa?
This is the same person who is trying to re-write an entire encyclopedia because facts aren't biased enough.
A group has created an alternate reality echo chamber, and the more reality doesn't match up the more they are trying to invent a fake one.
When you're on the side of book banning and Orwellian re-writing of facts & history that side never turns out to have been the good side. It's human nature for some people to be drawn to it as an easy escape rather than allowing their world views to be challenged. But you'd be pretty pressed to find the group doing that any of the times it's been done to have been anything but a negative for their society.