Kimi launches K3.1 Pro and K3.1 Pro Highspeed with 1M-token context

Kimi K3.1 Pro and K3.1 Pro Highspeed

Kimi released K3.1 Pro, a 3T-class model with a 1-million-token context window, and K3.1 Pro Highspeed, which runs 2–3× faster. After Kimi added cybersecurity risk controls to training data, K3.1 Pro's pass rate on an internal exploit test fell from 90.5% to 81.0%.

Why it matters: The drop from 90.5% to 81.0% on an internal exploit test shows what safety filtering in training data costs in offensive-security capability.