OpenAI’s September 8, 2026 announcement of a multi-agent AI proof establishing finite-time singularity for forced 3D Navier-Stokes equations (Clay statements C and D), complete with Lean formalization, underpins the 93.5% market-implied odds against retraction. The result used roughly 10,000 agents over 88 hours on an internal model exceeding GPT-6 Astra capabilities, framed explicitly as an AI progress report rather than a prize claim. Ongoing Clay review, priority disputes with Buckmaster and Alpöge, and October critiques of Lean-natural language mismatches or other withdrawn preprints have not produced a verifiable flaw requiring withdrawal. Traders see low likelihood of reversal absent a major technical invalidation before year-end, though a decisive Clay rejection or unrepairable error in the formalization could still shift sentiment.