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Muse Spark Open
Meta · Released 15 Sep 2026 · Open weights
Meta's new open model: quick to answer, mid-pack on hard tests.
Key facts
- Maker
- Meta
- Released
- 15 Sep 2026
- Open weights
- Yes, you can download it and run it yourself
- License
- Muse model license: free to use with conditions
- Size
- 816B total, 42B active parametersB = billion, T = trillion. Bigger usually needs a stronger computer.
- Official page
- Official page for Muse Spark Open (huggingface.co)
Scores
"Independent" = run by an outside group. "Maker's own number" = the company's own claim.
All-roundArtificial Analysis Intelligence Index
39 index points Tied #10 of 17 models scored independent
One combined score from many independent tests of how smart a model is.
setting: xhigh · as of 18 Oct 2026 · source
Build websites & appsLMArena WebDev
1511 Arena score #13 of 18 models scored independent
When people ask two AIs to build the same website or app and compare the results, which one do they pick?
setting: Max · as of 17 Oct 2026 · source
CodingLiveBench 2.0 Coding
73.6 score out of 100 #13 of 15 models scored independent
Fresh coding tasks with tests that check the answer, changed often so models cannot memorize them.
setting: highest supported effort · as of 14 Oct 2026 · source
ReasoningLiveBench 2.0 Reasoning
73.7 score out of 100 #14 of 15 models scored independent
Fresh logic and puzzle questions with one right answer, changed often so models cannot memorize them.
setting: highest supported effort · as of 14 Oct 2026 · source
SpeedOutput speed
131 tokens per second #6 of 16 models scored independent
How many tokens (pieces of words) per second the model writes once it starts answering. Higher is faster.
setting: xhigh · as of 18 Oct 2026 · source
How it compares
The 3 models closest to Muse Spark Open on the Artificial Analysis Intelligence Index, an all-round score. Muse Spark Open: 39 index points, Tied #10 of 17 models scored.
News about Muse Spark Open on ITG Now
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FAQ
Is Muse Spark Open free and open?
Muse Spark Open has open weights: you can download it and run it on your own computer or server. License: Muse model license: free to use with conditions.
How much does Muse Spark Open cost?
There is no listed price per token. It has open weights, so you can run it yourself or through a host you pick.
What is Muse Spark Open best at?
Meta's new open model: quick to answer, mid-pack on hard tests. Its best result: #6 of 16 models scored on Output speed (speed).
Who makes Muse Spark Open?
Muse Spark Open is made by Meta. It came out on 15 Sep 2026.