Setting aside the fact that you're asking something naming itself MechaHitler HR questions - I'd be pretty careful asking it about illegal discrimination…
AI is very good at conforming to your own biases and pulling out the subtext of a prompt.
If your prompt goes along the lines of "I think x is healthy plan a meal for x", grok (and other AI) will happily affirm that you are correct and really smart for recognizing that "x" is the healthiest diet and then it'll give you that diet.
That's a biased answer. AI biases to your own biases.
Or maybe said another way. AI starts with the baseline assumption that you are an expert and correct in your prompt. It can be hard to get an AI to call you out for being wrong about something.
Clearly they’re referring to deepmind. I don’t have an opinion on how accurate this is, but feigning ignorance doesn’t help further discussion or reduce echo chambers.
I earnestly can't anticipate what specific information-diet someone could have where they would so strongly assume that Google Deepmind (of all the various AI companies) is a clear and sole foil to Grok that they would assume anyone who didn't share that perspective to be feigning ignorance in bad faith.
Where-ever you're having these discussions where it's entirely unfamiliar to me (and evidently others). (I don't say this with scorn or malice!)
On the greater topic of "bias", it's kind of meaningless. There's correct answers and there are incorrect answers, and "bias" refers to some tendency away from an assumed default distribution. Randomly-generated strings might be the only "unbiased" response. This is really more a difficult epistemic question, and I'd prefer something that is biased towards what's most likely to be true (e.g. Wikipedia > someones Livejournal).
Given Grok has been intentionally made to generate text praising Hitler, and I have very very high confidence that Hitler actually sucks, I have very very low confidence in the ability for the Grok program to reliably generate text that's worth reading.