Not my experience. Grok seems to be perfectly willing to roast Musk for his shortcomings.

Where did you observe the bias? Can you share any example of the conversation or post by Grok?

I have used grok extensively for politics questions and it was undoubtedly left-wing.

Goes to show that no matter how you try to change a bot to say whatever you want, you can't without making it too obvious. These bots have been trained on the output of internet fora, printed media, etc. which is overwhelmingly left-wing, and therefore either you have a left-wing bot or you try to “push it” the other way and the bot starts saying nonsense like "kill the boer" or mechahitler.

It tells the truth, as long as you redefine truth to not include anything perceived as "liberal bias" (which by extension, also makes reality itself excluded)