Overview
Muse Spark Open is Meta’s October 2026 open-weight multimodal model (816B total / 42B active MoE parameters, 1M-token context) released under the Muse Model License on Hugging Face with hosted APIs and Apple Silicon cluster deployment via MLX.
Recent Developments
- 2026-10-15: Weights and NVFP4/BF16 checkpoints published; APIs on Baseten, Fireworks, Groq, Modal, Nebius, OpenRouter, Together (2026-10-15-meta-muse-spark-open-weight-model-macs)
- Local Apple deployment: Requires two M5 Ultra Mac Studios with 512GB unified memory each (or four with 256GB), macOS 26.2+, Thunderbolt 5 RDMA mesh — not laptop-class hardware
- Distinct from closed frontier meta-muse-wonder-frontier-model tier; complements proprietary muse-spark API line
Marketing "runs on Macs" reflects a ~$30k+ dual–Mac Studio cluster, not typical developer laptops.