Muse Spark Open
Meta's largest open model: 816B parameters, 42B active per token, a 1 million token context. It understands text, images, video and audio and answers in text. Built for programming and long agentic tasks. Trained on data in more than 100 languages. Access to the weights on Hugging Face is granted manually.
- Developer
- Meta Superintelligence Labs, USA
- First release
- Oct 2026
- Latest release
- Oct 2026
- Sizes
- 816B-A42B
- License
- Commercial use with conditionsMuse Model License: you may use, fine-tune and sell, but a "Built with Muse Spark Open" notice is required in the product and the usage policy must be followed; if you sell access to AI models by API (Model as a Service) and your revenue over 12 months is above 20 million dollars, a separate agreement with Meta is needed
- Russian
- Not stated
- Running
- On your own serverNeeds a GPU
- Industries
- Software development, Documents and accounting, Customer support, Science and research
What it does
- an agent for working with code and long tasks with tool calling
- analyzing screenshots, charts, documents, video and recordings
- generating training data for other models
- judging answers of other models (LLM as a judge)
Where it is used
Hardware requirements
Versions
- Muse Spark Open NVFP4 (для 700 ГБ видеопамяти)
- Muse Spark Open 816B-A42B (BF16)
How to run it
I can set this up end to end: pick the model size, deploy it on your server and connect it to your systems.
Frequently asked questions
Can Muse Spark Open be used in a commercial project?
With conditions. License: Muse Model License: you may use, fine-tune and sell, but a "Built with Muse Spark Open" notice is required in the product and the usage policy must be followed; if you sell access to AI models by API (Model as a Service) and your revenue over 12 months is above 20 million dollars, a separate agreement with Meta is needed. Restrictions vary — region, company revenue, attribution requirements. Have a lawyer check the terms before a commercial launch.
What hardware does Muse Spark Open need?
At minimum: Server with several GPUs — flagship versions. Without a GPU the model is not practical. You can calculate the exact VRAM for your model size and context in the hardware calculator.
Does Muse Spark Open support Russian?
The model card does not list languages, so Russian support cannot be promised — it has to be tested on your own examples.
Where can I download Muse Spark Open and what does it cost?
The Muse Spark Open weights are open and free to download. You only pay for the hardware it runs on and for the setup. Source links are at the bottom of this page.
How I deploy it for clients
- SelectionI pick the model size for your task and hardware and test it on your examples.
- DeploymentI deploy it on your server or in a closed network and provide an API.
- Fine-tuningI fine-tune it on your data (LoRA) or connect a knowledge base — whichever is cheaper for the task.
- IntegrationI connect it to your CRM, ERP, bot, website or team chat and set up monitoring.
Similar models
An open Meta model for agents on affordable hardware: distilled from the closed Muse Spark, understands text and images, trained on 100+ languages.
DetailsTextKimiMoonshot AI · ChinaCommercial use with conditionsVery large Moonshot MoE models for agentic work. K3 (2.8 trillion parameters) was the largest open model at release, with up to 1M tokens of context and image understanding; K2.7-Code is built for programming.
DetailsTextQwenAlibaba · ChinaCommercial use with conditionsA family of language models with strong Russian language support, from small versions for a laptop to a flagship on par with commercial APIs.
DetailsSource: huggingface.co/meta-models/Muse-Spark-Open-816B-A42B. Data checked against the model card on 22 Sep 2026. Have a lawyer review the license before commercial launch.