Overview
Kimi K3.1 Pro is a version of Kimi K3 that received substantially more post-training compute. The architecture and size are unchanged from K3. According to The Decoder, Artificial Analysis places it fourth on its Intelligence Index with 55 points, behind Claude Opus 5.5, Claude Sonnet 5.5 and Muse Wonder Full.
Highlights
- 2.8T total and 104B active parameters, one-million-token context window, text and image input
- API list price of $2.00 per million input tokens and $10.00 per million output tokens; a faster “Highspeed” variant costs $4.00 and $20.00
- Moonshot says weights will be released by November 4, 2026 (not yet available at the time of writing)
- Most benchmark figures in the launch table are reported by Moonshot, not independently confirmed