# Mistral Large 4: Europe’s 1T Open-Weight Model Has a Catch

> Source: <https://byteiota.com/mistral-large-4-open-weight-model-2026/>
> Published: 2026-10-09 07:11:09+00:00

Mistral AI shipped the preview of Large 4 on October 6 — a 1.05-trillion-parameter model the team has nicknamed “Le Chonk” — and committed to releasing the weights by October 27. That makes it the largest open-weight model ever from a European lab, and a direct challenge to the closed-model playbook. The benchmark story is mixed. The license story is, as of right now, nonexistent. That second part matters more than most coverage is letting on. What Mistral Large 4 Actually Is Large 4 is a Mixture-of-Experts (MoE) model: 1.05 trillion total parameters, but only 49 billion of them activate […]

The post