Kimi K3.1 Pro 发布：2.8T 开源权重模型逼近闭源前沿
原标题：[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
AI 摘要
Moonshot 发布 Kimi K3.1 Pro，这是一个 2.8 万亿总参数、1040 亿激活参数的多模态 MoE 模型，支持 100 万 token 上下文，API 已上线并提供速度提升 2-3 倍、价格翻倍的 Highspeed 版本，同时推出 Kimi Hosted Agents 托管执行环境。Artificial Analysis 将其排在 Intelligence Index 第四（55 分），Code Arena WebDev 第八，Cyber Index 得分 64% 为公开可访问最高。官方承诺 2026 年 11 月 4 日开放权重，但发布时权重未公开，许可证与部署要求尚不明确，社区对推理经济性和宣传方式存在争议。
正文节选
2 months ago we covered Z.ai CEO Prof Jie Tang’s prediction that we’d get a Fable-class open weights model by year end. 2 weeks ago Meta achieved a Fable-class model in closed source, but, with 2.5 months left to go, we finally got it - a 2.8T open weights model beating Fable 5.1, not just Fable 5, at that: with even better efficiency: As usual we don’t get much research detail - the update is somewhat similar to Z.ai’s 5.2-5.3 bump - a minor version bump for a lot more post-training: Kimi K3.1