A build of Moonshot AI’s newest model that was trained without any cyber-data filtering solved 90.5% of the company’s in-house exploit tasks. The version Moonshot released, Kimi K3.1 Pro, solves 81.0%.

Moonshot reported both numbers in the cybersecurity section of its technical blog post for Kimi K3.1 Pro , posted Friday afternoon U.S. time alongside a faster sibling, K3.1 Pro Highspeed. The Chinese startup says it removed cyber-related data from training for the model’s open-weight release, and the 9.5-point gap is its own measure of what that removal took away.

How close it gets to GPT-6 Astra and Opus 5.5

Moonshot calls K3.1 Pro its most capable 3T-class open-weight model. Its launch post on X lists 2.8 trillion total parameters with 104 billion active, in a multimodal mixture-of-experts design with a 1-million-token context window.…