Mistral Large 4 open weights: a 1-trillion-parameter model you can download

Mistral published the weights of Mistral Large 4 on 29 October 2026: about 1 trillion parameters, roughly 50 billion active, 1M context and image input. The licence, the API price and the hardware it needs.

· 3 min read · SparrowCodes team

Mistral released the weights of Mistral Large 4 on Hugging Face on 29 October 2026, after a public preview that started on 6 October. It is Mistral's largest model and one of the largest open-weight models available.

What it is

Mistral Large 4
ArchitectureMixture of experts with a vision encoder
ParametersAbout 1 trillion total, about 50 billion active per token
Context1M tokens
InputText and images
Weightsmistralai/Mistral-Large-4-1T-A52B, FP8 and NVFP4
The active count is reported as 49 billion per token, or 52 billion counting embedding and output layers, which is where the A52B in the name comes from.

The licence: open, with one big condition

The Mistral Ecosystem Open-Weight License is described as a modified MIT licence. Internal and commercial use are allowed. Offering the model to others as a hosted service needs a separate commercial licence from Mistral. If you want to run it for your own products and team, you're covered; if you want to sell access to it, talk to Mistral first.

The API price

Through Mistral's API it costs about $0.70 per million input tokens, $0.07 for cached input and $2.10 for output, roughly half the preview price. That puts it between the low-cost coding models and the frontier models on price.

Running it yourself

  • Hardware: one reference setup serves it with vLLM on eight NVIDIA H200 GPUs. A quantized version is reported to fit on four B200s.
  • NVFP4: the separate NVFP4 checkpoint is meant for NVIDIA Blackwell GPUs, where it saves memory and runs faster.
Mistral Large 4 open weights: a 1-trillion-parameter model you can download · SparrowCodes