Sebastien BubeckTristan BuckmasterOpenAIAnthropicNew York University

OpenAI claims to have solved Navier-Stokes problem, a Millennium Prize puzzle, as mathematician Tristan Buckmaster raises questions about the company's timing

OpenAI claims to have solved the Navier-Stokes problem, a Millennium Prize challenge, after investing millions in AI research. However, mathematician Tristan Buckmaster questions the timing, suggesting OpenAI may have accelerated its efforts after learning of rival breakthroughs, raising concerns about data usage.

The Guardian The Guardian8 September 2026 · 21:56 UTC
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OpenAI has announced a breakthrough in solving the Navier-Stokes problem, a significant challenge in mathematics. The company claims to have achieved this after deploying around 10,000 AI agents over 88 hours of computation. This problem is one of the seven Millennium Prize Problems, which have puzzled mathematicians for decades.289

However, the announcement has sparked controversy. Tristan Buckmaster, a mathematician at New York University, raised concerns that OpenAI may have rushed its solution after learning that he and a colleague at Anthropic were close to their own breakthrough. Buckmaster noted that their work was stored in OpenAI's Codex model, which could have made it accessible to OpenAI's team.34

In a statement, Buckmaster said, “I do not know what their model did, or how. I do not know whether our data was used. I am not accusing anyone of anything.” OpenAI researcher Sebastien Bubeck denied any wrongdoing, asserting that the company did not use the pair's work or access their shared materials. He acknowledged that while they could not rule out that data from the pair's use of their products may have helped improve their models, the solution represents a “spectacular culmination” of their efforts over the past year.5

OpenAI's announcement has reignited discussions about the ethical implications of AI in research and the competitive landscape of mathematical problem-solving.

Key Insight
“Buckmaster, a New York University professor, says OpenAI accelerated its work after learning he and an Anthropic researcher were close to announcing their own breakthrough, and he worries their data stored in OpenAI's Codex may have been visible. OpenAI's Sebastien Bubeck denies using the pair's work, but the company admits it cannot rule out that their product usage helped improve its models.”
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“OpenAI claims to have solved a major mathematics problem that has stumped humans for nearly a century after spending millions of dollars on the artificial intelligence-led endeavour.”
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