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Muse Spark Open

MetaOpen weightsReasoningProvisionalReleased Oct 15, 2026Input: text, image, video, file, audio
Compare with Gemini 3.6 FlashSource scores ↗OpenRouter ↗
Overall score
62.8
Rank 46 of 222 · 48.4–77.1
Context window
1M
1,000,000 tokens
Price per 1M tokens
$1.25 in · $4.25 out
Source: OpenRouter
Blended price
$2.00
3:1 input:output tokens
Output speed
—
Not measured yet

Category scores

Scores per capability area with the model's rank among ranked models in that category.

  1. 1Multimodal83.6
  2. 2Reasoning78.8
  3. 3Knowledge63.3
Higher is better. #N is the model's rank in that category, where it is eligible to be ranked.

Benchmark results (9)

As reported in system cards, papers and public evaluations. Position compares this model with every other model reporting the same benchmark.

Agentic & tool use

MCP Atlas89.2#1 of 42
JobBench61.8#6 of 34
HLE w/ tools61.0#6 of 27
Toolathlon-Verified72.8#14 of 22

Multimodal

SimpleVQA73.6#4 of 17
ZeroBench50.0#1 of 8
BabyVision80.2#2 of 8

Coding

DeepSWE60.0#35 of 50
SWE-Atlas Codebase QnA58.0#3 of 4

Pricing by source

USD per 1M tokens.

SourceInputOutputCached in
List price (OpenRouter)$1.25$4.25—
OpenRouter meta/muse-spark-open$1.25$4.25$0.15

Meta publishes downloadable Muse Model License weights and names hosted API partners (Baseten, Fireworks AI, Groq, Modal, Nebius, OpenRouter, Together AI). Neither the launch post nor the model card publishes a per-token price, and the Hugging Face page lists no deployed inference provider at the time of review. Partner prices are not copied here.

Arena ratings

Human-preference ratings from LMArena. Best-rated variant shown.

WebDev (coding)(Max)1528#52 · 1.4K votes

Open weights

From the Hugging Face repository.

Parameters
822B
Licence
other
Downloads (30 days)
2.6K

Speed

Measured by us through OpenRouter (median of trials).

Not measured yet.

Related models

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