OpenAI says an unreleased AI model has solved the Navier-Stokes existence and smoothness problem, a fluid dynamics question that has resisted mathematicians for roughly 90 years and carries a $1 million prize from the Clay Mathematics Institute. The company set about 10,000 AI agents on the task.

The company says it has cracked the physics of fluids using AI, solving one of the toughest puzzles in mathematics.

Mathematicians at OpenAI showed that the Navier-Stokes equations, which describe how fluids flow, can sometimes “blow up.” But the massive result is not without controversy.

Prior to the announcement, rumors were circulating online among mathematicians over the proof’s origins—OpenAI has denied all allegations