He posts some variant of this kind of anti AI piece roughly every two months for over 20 years. He's been wrong so far. Eventually he'll get lucky, but his track record is abysmal.
Has he been wrong about everything? I doubt that. It's also a logical fallacy to dismiss his current argument because he's made wrong arguments before. What he's saying about Altman lying is true or false independent of anything else he's said prior.
Gary is a bit of a stopped clock that always says the same time and is right occasionally. His basic position is these neural network things are not much good, they won't do whatever the current claim is.