He has a documented history (charitably) overly-optimistic claims and (accurately) lies. On multiple occasions, he (or an unnamed disgruntled employee who happens to share his exact views) has manipulated the output of his own chatbot to push particular political positions.
He's very unlikely to actually do this, and if he did, it would not do what he describes.
I've compared the bias from X and other platforms and you generally get both sides of the argument. Blue sky bans anything not left-leaning. This is evident by first-hand accounts and the fact that you never see both sides of an argument.