Meta releases Muse Spark Open, an open-weight multimodal coding model
Key points
- Mixture-of-experts model with about 816B total parameters, roughly 42B active per token.
- Accepts text, images, audio and video; context window reaches up to one million tokens.
- Meta says it was trained for agentic coding, including multi-file refactors and debugging.
- Two checkpoints are listed: a BF16 version and an NVFP4 version aimed at NVIDIA Blackwell GPUs.
Why it matters for marketers: Content and developer teams can self-host a long-context multimodal model and test it on screenshots, voice notes and screen recordings alongside code.