OpenAI pays for the earn out he would’ve otherwise received at Google + a new comp package. Made up numbers, if Google still owed him $10M for lasting the full two years, OpenAI can just pay him market rate +$10M.
Google is a different place today than even 5 years ago.
His raw skills are likely atrophied by now from delegating and operating at higher levels. His entire value is mostly political now.
If he can’t play the political game and win, he’s useless. He would probably just go to some other organization where people aren’t immune to his lore.