Mistral previews Mistral Large 4, a 1-trillion-parameter multimodal MoE

On October 6, 2026, Mistral AI released a public preview of Mistral Large 4, a natively multimodal model with 1 trillion total parameters and 52B active, priced at $0.7 input and $2.1 output per million tokens.

Archive entry: this covers an event from October 6, 2026, and we published it on November 8, 2026. The details come from sources dated at the time and may have changed since.

On October 6, 2026, Mistral AI released a public preview of Mistral Large 4, nicknamed le Chonk, through the preview API on Mistral Studio. In its announcement, the company said the weights would follow at the end of the month.

What Mistral released

A natively multimodal model with 1 trillion total parameters, 52B of them active, and Mistral's largest model.
Training from scratch on 3,800 NVIDIA Grace Blackwell GPUs in Mistral's own European datacenters, on data covering 160+ languages, including every official EU language.
API prices of $0.7 per million input tokens, $0.07 per million cached input tokens and $2.1 per million output tokens, under the model ID mistral-large-4.
The docs changelog listed it as a Public Preview open-weight multimodal MoE with 1M context, said open weights would follow, and gave launch pricing of 50% off for 2 weeks.

Benchmarks Mistral reported

Coding: 61.7% on DeepSWE v1.1, 59.4% on SWE-Atlas-QnA and 28.3% on Terminal-Bench 4, with a Coding Agent Index of 49.8%, ahead of DeepSeek V4 Pro 0813 and Qwen3.8 Max.
Cyber: 82% on the AA Cyber Index reproduce-and-patch test, a score Mistral called the highest of any model, and 93% of Cybench's 40 exercises.
Agents: 59.9% on AutomationBench and 1,393 Elo on AA-Briefcase.
In a Surge AI blind evaluation, the preview scored 3.74, second of five models, behind Claude Opus 5 at 4.22.

What it meant for people who build with AI

Developers got a frontier-scale coding and agent model from a European lab at $0.7 and $2.1 per million tokens, with open weights promised. Mistral called the preview the first milestone funded by its €3B Series D.

Sources

Introducing Mistral Large 4 | Mistral (Mistral AI, October 6, 2026, official)
Changelog | Mistral Docs (Mistral AI, October 6, 2026, official)

Written with AI assistance, strictly from the sources listed above. Before it went live, automated checks verified its dates, sources and every language edition.