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muse-spark

Muse Spark is Meta AI’s proprietary AI model, released Apr 8, 2026. Its strongest use case is reasoning & knowledge, where it ranks in the 77th percentile of the models Model Beat tracks.

Context
Input
/ 1M
Output
/ 1M
Released
Apr 8, 2026
Modalities
Strongest atReasoning & Knowledge top 23%Coding top 30%Math top 37%

Benchmarks

Scores on standardized evaluations. Higher is better — and rank shows where Muse Spark lands among all models tracked on Model Beat.

68.0
Intelligence Index
Epoch AI
68th percentile of tracked models
70.0
Coding Index
Epoch AI
70th percentile of tracked models
61.0
Agentic Index
Epoch AI
61st percentile of tracked models

Reasoning

3 evals
GPQA Diamond89.8%

Graduate-level scientific reasoning

Humanity's Last Exam40.6%

Frontier of human expert knowledge

SimpleQA Verified66.3%

Factual accuracy & hallucination

Coding

2 evals
SciCode51.5%

Scientific research coding

WebDev Arena1513

Human-rated web development

Math

3 evals
AIME 2024/202588.9%

Olympiad-qualifier math

FrontierMath39.0%

Research-level math problems

FrontierMath Tier 414.6%

Hardest research math

Agentic & Tools

1 evals
τ²-bench91.5%

Tool-agent-user reliability

In the news

3

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Frequently asked questions

What is Muse Spark?

Muse Spark is an AI model, from Meta AI, released Apr 8, 2026.

Who created Muse Spark?

Muse Spark is an AI model developed by Meta AI, released Apr 8, 2026.

How does Muse Spark perform on benchmarks?

On standardized evaluations tracked by Epoch AI, Muse Spark scores 66.3% on SimpleQA Verified, 40.6% on Humanity's Last Exam, 39.0% on FrontierMath.

Is Muse Spark open source?

Muse Spark is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.

Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Sep 17, 2026.