Kimi's new flagship K3.1 Pro packs 3T parameters and a 1M context window

Kimi K3.1 Pro and K3.1 Pro Highspeed

Kimi Code now ships the K3.1 Pro series: a 3T-parameter flagship with a 1M context window and gains in coding, 3D creation, and financial modeling. A Highspeed variant offers identical capability at roughly 2–3× the speed for double the quota. The models run thinking-only, reject requests with thinking disabled, and warn that switching models mid-session breaks the context cache.