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Live drop
Muse Spark Open
MetaDropped Oct 15, 2026
816B open-weight MoE multimodal model optimized for long-horizon coding and agentic desktop workflows.
About this release
Live drop
MetaDropped Oct 15, 2026
816B open-weight MoE multimodal model optimized for long-horizon coding and agentic desktop workflows.
About this release
Muse Spark Open is an 816B-total / 42B-active parameter open-weight MoE model derived from the Muse Spark line with additional safety post-training. It is natively multimodal (text, image, video, audio), supports 1M-token context, and excels at complex software engineering, multi-step reasoning, and multi-agent orchestration. Weights are available under the Muse Model License on Hugging Face and major hosts; runs on consumer hardware including dual Apple M5 Ultra Mac Studios.
Read the official Meta launch pageFirst builds incoming — this lane fills in automatically as people start building with Muse Spark Open. Know one? Submit the URL.