OpenAI’s recent announcement of an AI-generated proof for a finite-time singularity in the Navier-Stokes equations, formalized in Lean and released publicly on September 8, 2026, forms the core driver of the near-even trader consensus around non-retraction. The effort, involving an internal model more capable than GPT-6 Astra and roughly 10,000 agents over 88 hours, produced a verifiable write-up and repository that narrows the claim to specific statements in the Millennium Prize formulation. Lingering uncertainty stems from the intense credit dispute with NYU mathematician Tristan Buckmaster and Anthropic’s Levent Alpöge over parallel work on related Euler problems, alongside the inherent complexity of independently auditing large-scale AI-assisted mathematics. Key upcoming catalysts include broader community scrutiny of the Lean formalization, potential Clay Mathematics Institute commentary, and any corrections that could emerge before year-end as mathematicians test edge cases and reproducibility.