Mistral Says Its New AI Model ‘Le Chonk’ Is the Best Open-Weight Offering Outside of China

French AI lab Mistral has unveiled 'Le Chonk,' a one trillion-parameter open-weight model optimized for specialized industries like coding and cyberdefense. The company claims it is the most capable model developed outside of China and aims to compete with proprietary models from US labs.
Why it matters
The release of a high-performance open-weight model challenges the dominance of closed-source AI labs and provides businesses with more flexible, cost-effective alternatives.
The new one trillion-parameter model, Mistral Large 4—nicknamed Le Chonk—can be used and customized by anyone. It’s currently available in preview, with a final version to follow by the end of the month. Though Le Chonk is built to compete with leading general purpose models, it’s optimized specifically for coding and cyberdefense, as well as tasks particular to manufacturing, finance, electrical engineering, and other niches.
“There are a lot of areas where the other labs will not focus that much,” Guillaume Lample, cofounder and chief scientist at Mistral, tells WIRED. “There are so many domains in which you can improve models.”
Also covering this story
4 other newsrooms covered this event. We read each version separately.
Reflection AI launched its first open-weight model, Beam
Reflection debuts Beam, an open-weight AI model to rival Chinese models at lower compute cost
Beam: Reflection's 501B open-weight model
What is Beam? The buzzy American AI model being called the 'DeepSeek of the West'
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in