OpenAI says it has made “substantial progress” toward solving a second Millennium Prize mathematics problem, according to Decrypt. The company has not identified which problem is involved. The update follows OpenAI’s recently disputed claim concerning the Navier-Stokes existence and smoothness problem, one of the seven Millennium Prize Problems. Each problem carries a $1 million prize for a correct solution. OpenAI’s latest statement provides no further details about the work, the stage of the research, or when the problem’s identity might be disclosed. The announcement places the company’s mathematical research in focus again, but does not establish that a solution has been completed or formally accepted. Decrypt published the report on September 17, 2026.
