The heavy 89% market-implied odds on zero additional Millennium Prize Problems being solved by AI in 2026 reflect the September 2026 OpenAI announcement of an agent-based proof for the Navier-Stokes existence and smoothness problem, which remains under Clay Institute review with no official prize awarded yet. Subsequent partial claims on problems like Yang-Mills have not produced verified full solutions, and the remaining weeks of the year offer little time for new large language model breakthroughs or Lean formalizations to reach consensus. Traders view the slow pace of mathematical verification and the technical barriers in tackling the remaining deep conjectures as major hurdles, though any surprise year-end release could still alter the low single-digit probabilities for one or more resolutions.