DevelopingModels

Moonshot releases Kimi K3.1 Pro, with open weights due by Nov. 4

Moonshot released Kimi K3.1 Pro on Oct. 23, a post-trained K3 with a 1M-token context, via the Kimi API and apps. It reports 65.7% on Terminal-Bench 4.0 (Claude Opus 5.5: 66.4%) and hallucination down from 23.4% to 8.3%. Full weights are promised by Nov. 4. Benchmarks are Moonshot's own.

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FIRST SEEN: Oct 23, 2026, 15:00 ET
LAST SIGNAL: 5h ago

Primary source

Moonshot AIkimi.com/en/blog/kimi-k3-1-pro

Coverage · 5 articles, oldest first

Friday, October 23, 2026

15:00
The Decoder
Chinese AI model Kimi K3.1 Pro is closing in on Anthropic's Claude Opus 5.5
15:40
simonwillison.net
Introducing Kimi K3.1 Pro
16:04
Moonshot AIPrimary
Moonshot releases Kimi K3.1 Pro, with open weights due by Nov. 4
18:26
The Information
Moonshot AI Launches New Kimi K3.1 Pro Model
20:55
SiliconANGLE
Moonshot AI launches new flagship Kim K3.1 Pro model with 3T parameters

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