Kimi K3.1 Pro
Moonshot AI released Kimi K3.1 Pro, a 2.8T-parameter MoE with 104B active parameters and 1M context, on its API today, with full weights promised by Nov 4, 2026.
K3.1 Pro is the first model in the K3.1 series and follows Kimi K3 from July. Artificial Analysis scores it 55, up 11 points from Kimi K3 (max, 44), which puts it 4th overall. Moonshot says it removed cyber-related data from training phases to reduce misuse risk. A Highspeed version runs 2-3x faster at twice the price.
- Date
- Friday 23 October 2026
- Lab
- Moonshot AI
- Kind
- model
- Access
- closed API
- Price
- $2.00/million input tokens, $10/million output tokens (Highspeed version at twice the price, except cache hits)
Figures
| Measure | Value | Measured by |
|---|---|---|
| Artificial Analysis Intelligence Index | 55 4th overall; Claude Opus 5.5 scored 58; Kimi K3 (max) scored 44 | Artificial Analysis |
| Terminal-Bench 4.0 | 65.7 Moonshot's reported score; Claude Opus 5.5 66.4, GPT-6 Astra 58.2 | company |
| Parameters | 2.8T total, 104B active MoE, 1M-token context | company |
Weights are not yet public. Moonshot promises full weights by Nov 4, 2026.
Sources
- simonwillison.net/2026/Oct/23/kimi-k31-pro/
- techmeme.com/261023/p19#a261023p19
- techmeme.com/261023/p18#a261023p18
This record was partly confirmed: some claims could not be checked on 23 October 2026. How we check