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

Mistral AI shipped the preview of Mistral Large 4 on October 6, a 1.05-trillion-parameter Mixture-of-Experts model with 49 billion active parameters, and committed to releasing the weights by October 27, making it the largest open-weight model ever from a European lab. The model's license terms were not yet published as of the preview, a gap the coverage flags as more significant than the mixed benchmark results.

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