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Mistral Large 4 opens in public preview, with open weights due by the end of October

MistralNew modelConfirmed

Mistral launched a public preview of Mistral Large 4 (ML4), which it nicknames le Chonk.

  • The preview API is available today on Mistral Studio.
  • Mistral describes ML4 as a 1 trillion-parameter natively multimodal model with 49 billion active parameters, its largest and most capable model to date, trained from scratch on 3,800 NVIDIA Grace Blackwell GPUs in its own datacenters in Europe.
  • Mistral says it will release the weights by the end of the month.
  • Until then it is red-teaming the model with cybersecurity leaders, vetted partners and state authorities, who get the same model with reduced moderation and expanded cyber capabilities.
  • Mistral says the model will be available across multiple regions worldwide, including a European deployment it operates end-to-end.
Who can use it
Anyone with Mistral Studio access can try the preview API today. Open weights are promised but not yet released. Reduced-moderation access during the preview is limited to red-teaming partners.
When
Announced October 6, 2026; the preview API opened the same day. Mistral says the weights drop by the end of the month (October 2026) and gives no exact date.
Mistral: Introducing Mistral Large 4 Announced

Read the official announcement for access details. Availability can depend on your plan, region or workplace settings.

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