OpenAI’s Navier–Stokes attempt looks a lot less like “we completely solved Navier–Stokes” once you actually read what they proved. Their construction uses a specially engineered smooth external force to drive a finite-time singularity and they argue this satisfies Clay statements C and D because Clay explicitly allows forcing in those breakdown alternatives. That is a legitimate route through the wording of the Millennium Problem if the proof survives verification but it does not establish blowup for the unforced 3D equations and it does not settle whether ordinary smooth initial data with zero forcing stays regular forever. OpenAI therefore appears to have found a route through one specific branch of Clay’s formulation rather than resolving the full dynamical question people normally mean when they talk about Navier–Stokes regularity. Clay still lists Navier–Stokes among its unsolved problems as of September 10, 2026. So calling this a complete solution right now is premature at best.