It's more than that, supposedly Sama donated another 25mil through a PAC.

I'm sure the Crypto AI Czar (David Sacks) being a major Anthropic hater didn't hurt either

Or that Kushner put a billion in OpenAI recently

EDIT: wow they got in at a huge discount too and OpenAI bought stake in Thrive...

https://www.wsj.com/articles/thrive-capital-bought-shares-in...

https://openai.com/index/thrive-holdings/