Muse Spark Open
4.2/ 5
Meta's open-weight multimodal model for coding and agents, with a 1M context window.
Also known as Muse Spark
What it does
Muse Spark Open is a natively multimodal model from Meta, released October 15, 2026. Meta describes 816 billion total parameters, 42 billion active, and a 1 million token context window, built for coding and agentic work. The same post says it runs on two Apple M5 Ultra Mac Studios through MLX, and that the weights use the Muse Model License with limited commercial terms that let many developers use the model for free. Meta lists the weights on Hugging Face.
Who is Muse Spark Open for?
Developers who want a multimodal open-weight model for coding and agent work, including on Apple silicon.
Tags
- open-weight
- multimodal
- coding
Key facts
- Made by
- Meta
- Category
- Local models, Coding agents
- Pricing model
- Freemium
- Official site
- research.meta.ai/blog/muse-spark-open
- VibeStack score
- 4.2 / 5
- Last reviewed
