Kimi K3.1 Pro goes live on API, with open weights promised for 4 November
What happened
From the reports
Kimi K3.1 Pro 今日上线 Kimi API，目前尚未开放权重，Moonshot 承诺 2026 年 11 月 4 日前发布完整模型权重。
From Simon Willison
Timeline
Follow the reports to see the event from each side.
Oct 24
- Simon WillisonSelectedIntroducing Kimi K3.1 Pro
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).
Heat of this event
Not enough continuous observations yet to draw a trend.