Kimi K3.1 Pro reaches frontier-tier agent benchmarks at $2/$10 — weights are promised, not shipped
Kimi K3.1 Pro ships via API at $2 input/$10 output per million tokens, with a 2–3x faster Highspeed tier. Independent Artificial Analysis testing scores 55 on its Intelligence Index and 67% on Terminal-Bench 4.0. Open weights remain promised, not released.