# Moonshot says it removed cyber data from Kimi K3.1 Pro to limit offensive capability

> Original title: Models are are now approaching a massive general jump in cyber capabilities. From the Kimi K3.1 launch post:

- Source: Andrew Curran
- Published: 2026-10-23T18:07:32.000Z
- Bad Influence: https://badinfluence.news/items/p0vms3qipxzqfg4zilxj3kfu3
- Original: https://x.com/AndrewCurran_/status/2113693821930479725

## Summary

Andrew Curran reposts Moonshot's Kimi K3.1 launch post, which says the team found cyber capability rose with post-training scale. Moonshot says it removed cyber-related data from both mid-training and RL stages for the open-weight release of K3.1 Pro, and it intends to raise open-weight cyber capability progressively.

## Post

Models are are now approaching a massive general jump in cyber capabilities. From the Kimi K3.1 launch post:

'During development, we observed vulnerability research performance improving steadily as post-training scaled. Tracing the source of this trend, we found that cyber-related content was embedded within the general mid-training corpus, and cyber-related tasks were present in the RL environment mix — a natural byproduct of training on broad data. In preliminary experiments on internal models, we found that without data removal at either the mid-training or the RL stage, downstream cyber capability would increase substantially.'

![](https://badinfluence.news/api/img-proxy?u=https%3A%2F%2Fpbs.twimg.com%2Fmedia%2FHVVZU9mbkAAENVA.jpg&mode=thumb&exp=1793836800&sig=75aa33c8b8551681)

## Quoted post @AndrewCurran_

> Moonshot is intentionally throttling cyber capabilities. From the blog;
> 
> 'First, we aim not to release open weights that would extend the absolute frontier of cyber capability. K3.1 Pro's offensive cyber capability is, by design, below what our pipeline can produce, and remains behind that of frontier proprietary models. Second, we intend to progressively raise the cyber capability available in open weights. We believe making K3.1 Pro available in a non-discriminatory way benefits people who need dual-use capabilities for defensive purposes.'

https://x.com/AndrewCurran_/status/2113685878191329344