Like I have said for so long, it was snake oil, another theranos style lie whereby he overegged the speed of future development. He has at the very best exaggerated to gain funding, at the very worst potentially told outright lies (Open, what a joke!).
This is a decent video summary that goes a bit deeper than the article.
What Sam Altman doesn't want you to know
https://www.youtube.com/watch?v=l0K4XPu3Qhg