Moonshot AI dropped Kimi K3.1 Pro on October 23. It’s the first model in their new K3.1 series, a 3T-class open-weight model with a 1-million-token context window. The weights go public by November 4. For anyone tracking the open-vs-proprietary gap, this release matters — it’s the closest an open model has come to matching the frontier on coding and agentic benchmarks.
Kimi K3.1 Pro - Open Weights Catch Up to the Frontier
October 25, 2026