The LLMCheck index estimates Muse Spark Open at ~31 tok/s on an M5 Ultra at oQ3e, scaled from its published M3 Ultra run with the published bandwidth model, not a measured run on this chip. It needs about 342 GB of unified memory. It is Meta's 816B mixture-of-experts model (42B active), released under the Muse Model License licence.
Want to run Muse Spark Open faster — or step up to bigger models? Find your Mac →This is an LLMCheck index estimate from its published two-term bandwidth model, not a measured run; the index labels it so everywhere it appears. Own this Mac? Submit a real run →
| Metric | Value |
|---|---|
| Tokens per second | estimated~31 tok/s |
| Provenance | estimate · how estimates are made |
| Quantization | oQ3e |
| Engine | MLX |
| Figure dated | 2026-10 |
| Minimum RAM | 342 GB |
| Parameters | 816B MoE (42B active) |
| Chip bandwidth | 1228 GB/s |
Each row as the index holds it, with its source. “Mac RAM” is the memory of the Mac a run used, not the model’s requirement (342 GB). The headline figure follows the reference rule: the lower-median measured plain-decode run at 5 bits or fewer (a run whose quant was not stated counts only when no stated-quant run qualifies), else the estimate; a run marked “not used to anchor estimates” is listed here but never becomes the headline.
| Speed | Quant | Engine | Mac RAM | Context | Source | Note |
|---|---|---|---|---|---|---|
| estimated31 tok/s | oQ3e | MLX | 512 GB | — | LLMCheck estimator | — |
Ollama — the index has not verified an Ollama tag for Muse Spark Open, so it doesn’t print one (a guessed tag fails with “pull model manifest: file does not exist”). Search the Ollama library →
MLX — pick a build from Hugging Face’s MLX listings, then run it with its repo id:
Downloads: Hugging Face repo → · model card →
Prefer a GUI? LM Studio downloads GGUF and MLX builds in one click. Step by step: install Ollama on a Mac.
| Chip | Speed | Quant | Engine | Bandwidth |
|---|---|---|---|---|
| M3 Ultra | sourced18 tok/s | Q2_K | llama.cpp | 819 GB/s |
Meta's open-weight Muse Spark (weights 15 Oct 2026): an 816B MoE with 42B active, 1M context and text, image, video and audio input, under the Muse Model License (products must show a 'Built with Muse Spark Open' credit; API hosts above $20M revenue need a separate agreement). One 512 GB Mac Studio runs it at 2–3-bit: Hugging Face's launch post reports 21 tok/s (oQ3e, MLX) and 18 tok/s (Q2_K, llama.cpp b11671+) on an M3 Ultra, while 4-bit needs two Macs. Ollama and LM Studio offer it cloud-only.
Muse Model License licence · 816B MoE · 1000K context · LLMCheck capability 49/50 · see its leaderboard rank →
Muse Spark Open needs about 342 GB of unified memory. These current Apple Silicon Macs have the headroom to run it comfortably:
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See how Muse Spark Open stacks up against other models on your specific Mac hardware.
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