OpenAI says it has solved the Navier–Stokes problem.

The proof was produced by a group of 10,000 AI agents running on an internal model that the company says is more powerful than GPT-6 Astra. It took 88 hours and 130 billion output tokens.

The agents showed that the flow of a viscous fluid under a smooth external force accelerates to infinite speed in finite time—meaning the equations stop describing reality. OpenAI does not intend to claim the $1 million prize.

There are already questions about the result: mathematician Tristan Buckmaster and Levent Alpöge of Anthropic today released their own proofs for related equations, along with a statement describing how OpenAI proposed publishing the Navier–Stokes work without Alpöge, because he works for a competitor.