By Brian Buntz | November 2, 2026Altman bets OpenAI could redo its $10 million Navier–Stokes proof at 1/100th the cost by September 2027 Sam Altman told Stripe’s Cheeky Pint that OpenAI’s Navier-Stokes proof cost about $10 million and bet the same work will cost 1/100th as much within a year.