Kimi K3.1 Pro

Moonshot's upgraded Kimi K3 model is out in its apps and API, with a 2-3x faster Highspeed version and open weights promised by Nov 4.

Kimi K3.1 Pro is a post-trained version of the roughly 3-trillion-parameter Kimi K3 with a 1-million-token context window. Moonshot's own numbers put it at 65.7% on Terminal-Bench 4.0, ahead of GPT-6 Astra (58.2%) and just behind Claude Opus 5.5 (66.4%); these have not been independently checked. Moonshot says it removed cyberattack-related training data before the open-weight release. It is available on Kimi.ai, Kimi Work, Kimi Code and the Kimi API.

Status

Released

Date

Oct 23, 2026 (app and API)

Maker

Moonshot AI

Type

AI model

Price

Kimi apps and API

Categories

AI

Sources

• Kimi blog
• Kimi Forum announcement
• The Next Web

Launch dates can change. Check the sources for the latest. Last reviewed Nov 10, 2026.