Muse Spark Open
Open Source
The most capable US open weights model to date
Meta's open weights model built for coding and agentic work. 816B total parameters with 42B active, a 1M token context window and native multimodal input. Download the weights on Hugging Face or run it on two M5 Ultra Mac Studios with MLX.
Muse Spark Open is a Open Source company. It launched on Product Hunt on Oct 16, 2026, with 85 upvotes. Adamlead has 1 person on file at Muse Spark Open.
Muse Spark Open at a glance
- Website
- musesparkopen.app
Muse Spark Open timeline
- The most capable US open weights model to date
People at Muse Spark Open
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| Name | Title | |
|---|---|---|
| Maker | – |
Frequently asked questions
Who works at Muse Spark Open?
Adamlead has 1 person on file at Muse Spark Open, including David Singleton (Maker). Each email shows whether it has been verified.