No idea, but given how sudden and out-of-the-blue this is, and the fact that he was co-founder of OpenAI (meaning that to some degree the board is pushing him out of his own company) you can make an educated guess that’s it’s huge.

My guess, personally, is financial malfeasance, if only because personal misbehavior usually involves some hemming and hawing before a company concludes that the ejectee “is no longer a good fit and does not represent the values held by our organization.” This was very sudden, no one saw it coming, and that’s not too usual.

I guess we’ll see, lol.

I interpret their wording that he lied to the board repeadetly and made some unethical backdoor deals of evil.