Meta releases Muse Spark Open weights: 816B parameters, 42B active
It reads a 1M-token context and ships under the Muse Model License on Hugging Face.
Meta, language model
Muse Spark Open
Released Oct 15, 2026. Scored on 2 boards.
39Artificial Analysis Intelligence IndexRank 36 of 40
- Released
- Oct 15, 2026
- Price, in / out
- $1.25 / $4.25
- per 1M tokens, list price
- Blended price
- $2.00
- 3 input tokens per output token
- Context
- n/a
- Open weights
- No
Scores
The latest published score on each board, ranked against every model we track. Each score links to its source.
| Board | Score | Rank | Record | Date | Source | Readings |
|---|---|---|---|---|---|---|
| Artificial Analysis Intelligence IndexOverall | 39Xhigh | 36 of 40 | 58Claude Opus 5.5 | Oct 20, 2026 | artificialanalysis.ai | 1 |
| Output speedSpeed | 140Xhigh | 8 of 26 | 239Claude Haiku 5.5 | Oct 20, 2026 | artificialanalysis.ai | 1 |
Compare with
The closest models on the boards they share with Muse Spark Open.
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