Last Week in AI #346 - 719 math manuscripts, 2 Western open models, 1 more safety resignation

OpenAI released 719 mathematics manuscripts on October 6, 2026 that were generated by an internal frontier model (not publicly available), covering 372 topic families—including a solution to the Navier‑Stokes equation—and featuring formal proofs in Lean and compute estimates for each problem. Mistral and Reflection AI simultaneously unveiled open‑weight models designed to compete with Chinese AI offerings, while the industry noted another resignation from an AI safety position, underscoring continued governance concerns.

Source: Last Week in AI | 2026-10-09