Moonshot AI releases Kimi K3.1 Pro; open-weight release set for Nov. 4
Moonshot AI has launched Kimi K3.1 Pro, a MoE model with a claimed 2.8T total and 104B active parameters (IT Home cites roughly 3T), 1M token context, and API pricing of $2 per 1M input tokens and $10 per 1M output tokens, with full open weights promised by Nov. 4, 2026; a Highspeed variant runs 2-3x faster. It is available via kimi.com, Kimi App, Kimi Work, Kimi Code, and Kimi API. Artificial Analysis ranks it first among publicly available models for agent cyber defense, scoring 64% on its Cyber Index behind the restricted GPT-6 Sol (Daybreak Blue), at $2.81 per task versus $1.77 and $0.42 for DeepSeek V4.1 Flash 1017. The company says it matches or nears top closed models in coding, agent, and knowledge benchmarks with 65.7% on Terminal-Bench 4.0; Artificial Analysis sees early signs of a lower AA-3D ranking while collecting preference votes.
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