Skip to content
AI

Introducing Kimi K3.1 Pro

Simon Willison · Oct 23, 2026 · 3:40 PM ET

Introducing Kimi K3.1 Pro Kimi K3.1 Pro landed on the Kimi API today - it's not yet open weights, but Moonshot promise "Full model weights will be released by Nov 4, 2026". They're also offering a "Highspeed" version that's 2-3x faster, at twice the price (except for input token cache hits, which are priced the same). The US dollar pricing is $2.00/million tokens for input and $10/million for...

Why it scores

Rules judge: AI item; Topics: open source; Source: Simon Willison.

Builder score 50

0 to 100: how useful this is for building or owning income-producing assets, digital or physical. Not a rating of how big the news is.

Related in this story

[AINews] Kimi 3.1 Pro 104BA-2.8T: Fable-5.1-Class Open Weights narrows Closed-AI lead to 1 month... and Pro Highspeed API with 2-3× speed