NewsLast Week in AI #344 - Navier–Stokes, Pacing the Frontier, AI MisuseOpenAI claims a Millennium Prize proof amid a feud with mathematicians, Anthropic's CEO calls to pace the frontier, extinction warnings spur a regulation push, and more! Last Week in AISep 17, 2026∙ Paid244ShareTop NewsOpenAI Says It Has Cracked One of Math’s ‘Millennium Problems’Related:On the Navier–Stokes Millennium Prize ProblemQuartz: OpenAI cracks the Navier–Stokes Millennium Prize problemOpenAI fought dirty on career-making math problem, says NYU mathematicianOpenAI’s feud with mathematicians is only escalatingSource: OpenAI blog postOpenAI said on Sept…Continue reading this post for free, courtesy of Last Week in AI.Claim my free postOr purchase a paid subscription.