OpenAI says a model solved over 100 open math problems, listing none
On September 21, 2026, OpenAI said an internal model whose training began on August 28 has, beyond resolving the Navier-Stokes Millennium Prize problem, resolved more than 100 long-standing open problems across most areas of mathematics. The announcement names no model, lists none of the problems and gives no proof index. It came ten days after 25 Fields Medal winners, including Terence Tao and Maryna Viazovska, signed an open letter titled "A Severe Misalignment of AI in Mathematics." OpenAI's response is an independent advisory group hosted at the Institute for Advanced Study in Princeton, with nine mathematicians including Edward Witten, Timothy Gowers, Martin Hairer and Ravi Vakil. OpenAI says the group will not advise it on how to pace its internal progress on mathematics.