Muse Spark Open
Meta’s open-weight 816B MoE, tuned for agentic coding.
Muse Spark Open is an open-weight Muse model from Meta: a mixture of experts with 816B total and 42B active parameters, trained mainly for agentic coding, tool use and understanding large repositories. It accepts text, images, video, audio and files.
- Provider
- Meta
- Type
- Language model
- Released
- Oct 15, 2026
- Input
- text, image, video, audio, file
- Output
- text
- Open weights
- Yes
- License
- Muse Model License
Best for
- Coding
- Agents
- Reasoning
- Long context
Strengths
- Open weights at 816B scale
- Agentic coding focus
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