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Muse Spark 1.3

Benchmarks, price, context and versions

Also searched as

Muse-Spark-1.3

Direct answer: Muse Spark 1.3 is a model from Meta. 99.2% on OTIS Mock AIME, per Epoch AI. On OpenRouter, US$ 1.25 per 1 million input tokens and US$ 4.25 per 1 million output tokens.

✓ Good for

  • calculation and problems with an exact answer (#21 of 186 on OTIS Mock AIME)
  • very long documents or code (a window of 1 million tokens or more, according to OpenRouter)

✕ Not the best for

  • Not enough data in the open sources this section uses to build this block.

This block follows a rule of this section, using source data: if the model is in the top 25% of the metric, the item goes under "Good for"; if it is in the bottom half, it goes under "Not the best for". The middle band appears in neither. Price and context use OpenRouter; scores use Epoch AI or OpenRouter Benchmarks, in the latest version we checked.

Benchmarks

OTIS Mock AIME

?what it is
99.2%

highest score on this metric 100%

21º / 186 · Epoch AI, latest version we checked

FrontierMath (tiers 1 to 3)

?
74.4%

highest score on this metric 95.1%

25º / 86 · Epoch AI, latest version we checked

Key specs

Lab
Meta
Origin
the US
Family
Muse Spark provisional data
Weights?
closed
License
no data
Input US$/1M?
US$ 1.25
Output US$/1M
US$ 4.25
Context?
1,048,576 tokens
Parameters
no data
Input
file, image, text, video
OpenRouter usage?
no data
Downloads (30 days)?
no data
Use cases provisional data
Text Agents
Dates in sources
  • 2026, published, per Epoch AI
  • 2026, listed on OpenRouter

Version history

Dates come from the sources: OpenRouter listing or Hugging Face repo creation, which may differ from the official launch.

FAQ

What is Muse Spark 1.3?

Muse Spark 1.3 is a model from Meta, with closed weights, used for text, agents.

How much does Muse Spark 1.3 cost?

On OpenRouter, US$ 1.25 per 1 million input tokens and US$ 4.25 per 1 million output tokens.

What is the context window of Muse Spark 1.3?

1,048,576 tokens, per OpenRouter.

Is Muse Spark 1.3 open source?

No. It is available through API only.

What is Muse Spark 1.3's OTIS Mock AIME score?

99.2% on OTIS Mock AIME, per Epoch AI.

Is Muse Spark 1.3 good for coding?

No data: there is no SWE-bench Verified measurement for it in open sources.

Who made Muse Spark 1.3?

It was made by Meta, a lab from the US.

provisional data Questions under review: Semrush had no API balance during collection. Answers use source data only.

Models from Meta

See lab

Sources

  • Epoch AI, CC BY 4.0, latest version we checked.
  • OpenRouter, dados públicos da API; exports de benchmarks e rankings em CC BY 4.0, latest version we checked.

Dates come from the sources: OpenRouter listing or Hugging Face repo creation, which may differ from the official launch. Family and version were grouped by rule from the name.