Meta Muse Spark Open
A large open-weight MoE model released by Meta, aimed at agentic coding. It supports text, image, audio and video inputs, with approximately 816 billion total parameters and about 42 billion activated per token.
Core Facts
Muse Spark Open uses an MoE architecture, with 816B total parameters and 42B activated parameters.
The Muse model license requires prominent labeling of 'Built with Muse Spark Open', and companies with annual revenue over $20 million that offer it as a service must notify Meta and sign a commercial agreement.
Timeline (last 90 days)
Meta Muse Spark Open requires two M5 Ultra Mac Studios with 512GB of memory each to run, and Apple says that configuration ships in late October with pricing not yet announced.
Muse Spark Open scored 76.4 on Terminal-Bench 2.1, lower than GLM 5.3's 83.9 and Kimi K3's 85.
The Muse model license requires prominent labeling of 'Built with Muse Spark Open', and companies with annual revenue over $20 million that offer it as a service must notify Meta and sign a commercial agreement.
Unsloth released version v0.1.908-beta, adding local support for the NVIDIA Nemotron 3.5 series, downloads of the Meta Muse Spark Open model, and training and chat support for text diffusion language models.
Meta Muse Spark Open's input modalities cover text, images, video and audio, and the degree of reasoning effort can be adjusted between low and xhigh.
Muse Spark Open uses an MoE architecture, with 816B total parameters and 42B activated parameters.
All Facts (6)
Muse Spark Open uses an MoE architecture, with 816B total parameters and 42B activated parameters.
85%Partially VerifiedThe Muse model license requires prominent labeling of 'Built with Muse Spark Open', and companies with annual revenue over $20 million that offer it as a service must notify Meta and sign a commercial agreement.
65%UnverifiedMeta Muse Spark Open requires two M5 Ultra Mac Studios with 512GB of memory each to run, and Apple says that configuration ships in late October with pricing not yet announced.
50%UnverifiedMuse Spark Open scored 76.4 on Terminal-Bench 2.1, lower than GLM 5.3's 83.9 and Kimi K3's 85.
50%UnverifiedMeta Muse Spark Open's input modalities cover text, images, video and audio, and the degree of reasoning effort can be adjusted between low and xhigh.
50%UnverifiedUnsloth released version v0.1.908-beta, adding local support for the NVIDIA Nemotron 3.5 series, downloads of the Meta Muse Spark Open model, and training and chat support for text diffusion language models.
50%