Kimi K3.1 Pro

Moonshot's Kimi K3.1 Pro Nearly Matches Claude Opus 5.5

Moonshot AI launched Kimi K3.1 Pro on October 23, an open-weight model that scored 65.7% on Terminal-Bench 4.0 — within a point of Claude Opus 5.5 — and ranks fourth on the Artificial Analysis Intelligence Index with 55 points. Full story in slides above. Sources: Moonshot AI launch post, The Decoder, Artificial Analysis, ANI via New Kerala, Crypto Briefing.

Illustration of a glowing AI network sealed inside a glass enclosure, with hacking tools held outside by a shield

Moonshot Made Kimi K3.1 Pro Worse at Hacking on Purpose

Moonshot AI just did something almost no AI lab volunteers to do: it made its newest model worse at one job, on purpose. On Saturday, the Beijing-based company said it had stripped cyber-related data from the training of Kimi K3.1 Pro, its most capable open-weight model, while keeping the general coding skills that made the Kimi line popular with developers. Reuters reported the curbs as Moonshot introduced the model on October 23, and the company plans to publish the model’s weights by November 4. ...