OpenAI Claims Navier-Stokes Millennium Prize Solution, Prompting a Mathematician's Rethink on AI Math

fortnow · x · 2026-09-14

Blogger Bill Gasarch had vowed he'd only write about AI math once AI solved a Millennium Prize Problem — and on September 8, OpenAI announced exactly that: a solution to the Navier-Stokes Millennium Prize Problem, with Lance Fortnow covering it the next day.

Back in May, after OpenAI resolved the Erdős Unit Distance problem, Gasarch sketched two futures: (1) such results would be rare flukes — counterexamples assembled from known math in a perfect storm; (2) AI makes seeking help so easy that everyone will end up prematurely outsourcing problem-solving. Reality has not been kind to option one: in August OpenAI solved ten open math problems, and the line between proving a conjecture and constructing a counterexample may be an illusion. The piece captures how mathematicians are adjusting to AI as a routine solver of open problems.

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