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Out-numbered: AI’s contentious maths milestone

September 11, 2026

AI Summary

5 min read

OpenAI says it solved one of the seven Millennium Prize problems—the Navier-Stokes Existence and Smoothness Problem—in under four days of work by a swarm of 10,000 AI agents. The prize for cracking one is a million dollars. But the mathematics community is not celebrating. The solution arrived with secrecy, controversy, and a deep question about what mathematics is actually for.

The problem and why it matters

The Navier-Stokes equations describe how fluids move—air over a wing, blood through arteries, oil through pipes. Engineers and physicists use them constantly. But mathematicians care about something deeper: whether the equations always produce smooth, well-behaved solutions, or whether there are hidden situations where they break down. The "existence and smoothness" problem asks, in essence, whether the equations can ever produce a physically impossible result from seemingly normal starting conditions. It is one of seven problems the Clay Mathematics Institute listed in 2000 as the hardest open questions in the field.

How OpenAI says it did it

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What you'll learn

  • 1 (01:28) **AI’s Math Milestone: The Setup** - The episode introduces a transformation in higher mathematics, where OpenAI claims to have solved the Navier-Stokes Existence and Smoothness Problem, one of the seven Millennium Prize problems.
  • 2 (03:18) **The Problem Explained: Navier-Stokes** - Sam Wiggle breaks down what the Navier-Stokes equations are and why the Millennium Problem matters.
  • 3 (04:56) **How OpenAI Allegedly Solved It** - Sam details the timeline and resources OpenAI claims to have used to crack the problem.
  • 4 (06:33) **The Messy Backstory: Rivalry and Premature Publication** - The story becomes contentious due to a rumored race between OpenAI and human mathematicians.
  • 5 (07:35) **The Core Controversy: Solution vs. Insight** - Mathematicians are skeptical because OpenAI’s paper lacks the detailed reasoning expected in the field.
  • 6 (08:38) **The Deeper Question: What is the Purpose of Math?** - The segment explores the existential implications for the field if AI can simply skip to the answer.
  • 7 (10:14) **Conclusion on the Math Segment** - OpenAI has stated they will not claim the $1 million prize, and mathematicians are left pondering the future of their subject.

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Guests on this episode

Show Notes

OpenAI’s claim to have solved one of the great problems in mathematics has itself created problems. We ask why the breakthrough has shaken the field. On the 25th anniversary of 9/11 we examine the vast counterterrorism machinery that followed in America, and nascent efforts to pare those powers back. And remembering Guo Lanying, a Chinese singer who championed traditional opera.


Watch extended clips from Insider here.

Guests and host:

  • Sam Wikeley, science correspondent
  • Sam Beal, Washington correspondent
  • Ann Wroe, obituaries editor
  • Jason Palmer, co-host of “The Intelligence”


Topics covered: 

  • mathematics, AI, Millennium Prize Problems
  • 9/11 anniversary, counterterrorism law
  • Guo Lanying, Chinese opera


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