# Mistral releases open weights for improved Mistral Large 4 model

> Original title: Le Chonk: Built for Coders, Trusted by Defenders.

- Source: Mistral AI
- Published: 2026-10-29T12:00:07.000Z
- Bad Influence: https://badinfluence.news/items/w5rvy8m55tmne3puvnt0bvuxi
- Original: https://mistral.ai/news/mistral-large-4-oss/

## Summary

Mistral AI has released the open weights of an improved Mistral Large 4, a 1-trillion-parameter multimodal model, after three weeks of additional reinforcement learning. The company reports a 51% score on the Artificial Analysis Cyber Index and a 41% score on Terminal-Bench 4.0, up 13 points from the public preview. The model is priced at $0.70 per million input tokens and $2.10 per million output tokens, and is available under a modified MIT license.

## Why it matters

The post reports benchmark gains and new reasoning modes for an open-weight model, with pricing and license terms that matter to anyone weighing self-hosting.