# Cognition adds a mid-training stage before reinforcement learning

> Original title: For the first time, we also added a mid-training stage before RL. We trained on several trillion tokens of code, scientific articles, blo...

- Source: Cognition
- Published: 2026-11-04T19:55:24.000Z
- Bad Influence: https://badinfluence.news/items/lom1zveccmz3ln313eg2etuv5
- Original: https://x.com/cognition/status/2118069623170187602

## Summary

Cognition says it added a mid-training stage before reinforcement learning for the first time. The stage trains on several trillion tokens of code, scientific articles, and blogs, with the scarcest, highest-quality data saved for last.

## Post

For the first time, we also added a mid-training stage before RL. We trained on several trillion tokens of code, scientific articles, blogs, and more, saving the scarcest, highest-quality data for last.

![](https://badinfluence.news/api/img-proxy?u=https%3A%2F%2Fpbs.twimg.com%2Fmedia%2FHWTZsS5WIAAL6va.jpg&mode=thumb&exp=1794009600&sig=b3efbcb5f100c1d8)