Moonshot puts Kimi K3.1 Pro on its API at $2 in, $10 out; weights due by 4 Nov

TL;DR

• On 23 October Moonshot AI released Kimi K3.1 Pro and K3.1 Pro Highspeed on Kimi.ai, Kimi Work, Kimi Code and the Kimi API, with the weights promised by 4 November 2026.
• The API costs $2.00 per million input tokens and $10.00 per million output tokens for K3.1 Pro, and $4.00 and $20.00 for Highspeed, with cache hits at $0.20.
• Moonshot's own tests put it at 65.7% on Terminal-Bench 4.0; Artificial Analysis ranks it 4th on its Intelligence Index with a score of 55.