I have to imagine that Anthropic is giving him an equity grant worth $1B or more in their upcoming IPO. And having him will increase their market cap more than that, if for no other reason than that people trust him as a judge of who is winning the AI race. So it's already worth it even before he does any work.

didn't FB grant someone else $1B over 4 years or something for some AI lead role? Wouldn't be surprised if this guy is getting similar offers, which could explode even further with the stratospheric valuations of top AI companies.

He’s a founder of OpenAI —- likely a billionaire if he held on to his share