Recent AI-driven advances in mathematics have shaped trader views on whether Anthropic will claim a Millennium Prize solution. In August 2026 an unreleased Claude model improved bounds on a Riemann zeta function question tied to the hypothesis, while September developments featured Anthropic researcher Levent Alpöge collaborating on finite-time blowup results for Euler equations and related systems using Claude and other LLMs. These efforts, verified in Lean, fell short of a full Navier-Stokes resolution but fueled rumors that prompted OpenAI’s concurrent claim of solving that Millennium problem. Anthropic has also used Claude to autoformalize Fermat’s Last Theorem. No official company announcement of a prize-winning solution has occurred, leaving outcomes dependent on further model releases, internal research timelines, and verification standards for Clay Institute recognition.