Kimi K3.1 Pro debuts as top open-weight model in agent cyber defense
Moonshot AI has released Kimi K3.1 Pro, with API access at $2 per million input tokens and $10 per million output tokens, and full weights promised by November 4, 2026; a Highspeed variant runs 2-3x faster at double the price. Artificial Analysis ranks it first among publicly available models in agent cyber defense with a 64% Cyber Index score, behind only the restricted GPT-6 Sol (Daybreak Blue), though its $2.81 per-task cost exceeds GPT-6 Sol's $1.77 and DeepSeek V4.1 Flash 1017's $0.42. Reports differ on scale, citing either 2.8T total and 104B active parameters or roughly 3T.
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