Musk seems to think that a PhD is just reading a lot. The main difference between a PhD and a Masters besides the structure is that a PhD requires making an original contribution to the field, not just knowing a bunch of established things about it. On that basis, no AI can resemble having a PhD in anything and Musk is a complete pseudo-intellectual who wants to use academia for credibility without understanding its most basic functions.

Also it just gets basic facts wrong anyway quite often.