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ModelCap

Muse Spark 1.2

Current board #71 Arena configurationsNewAPI only

Meta·meta/muse-spark-1.2

Muse Spark 1.2 is a language model published by Meta. 1 OpenRouter endpoint is published in the latest snapshot. It accepts text, image, video, file, audio input and returns text. The published context limit is 1.0M tokens. The catalogue declares support for reasoning, tool use, structured outputs.

ModelCap Index · Current board
87.4#7
Measured · 38% support · score interval 87.4–100.0
Market Gravity
32.5
Secondary market signal
Input
$1.25
per 1M tokens
Output
$4.25
per 1M tokens
Context
1.0M
tokens
Providers
1
endpoint
Gateway spend
—
latest · Vercel share

Providers

Uptime measured over the last 30 minutes
ProviderInputOutputContextQuantUptime
Meta$1.25$4.251.0M—100.0%

Reasoning efforts

Best supported result can inform ModelCap

Published Max, X-High, High and other configurations for this model. These are sourced scores, not head-to-head essays.

Related community configurations

Human preference rating
ConfigurationRatingSource rankVotesSource
X-High
muse-spark-1.2 (xHigh)
1498
CI 1485–1511
#42KArena
Match 100%

Other versions (1)

ModelCap Index · Current board

Methodology
87.4
Measured · 2 public benchmark observations across 2 boards
Current board
#7
Public rank basis
Measured (measured)
Index support
37.8% · moderate
Index interval
87.4–100.0
Rank posterior
Not available
Top 5 / Top 10 probability
Not available / Not available
Posterior as of
Snapshot timestamp unavailable
Identity binding
Exact catalogue product · meta/meta/muse-spark-1.2 · aggregates disclosed benchmark configurations · endpoint configuration not claimed
Direct benchmark observations
2
Breadth-adjusted BES point estimate
94.4
Bayesian Evidence Score · measured evidence input only

BES normalizes admitted public benchmark evidence for measured Index rows. Its legacy score and observables prior do not define the public language rank.

Observed capability
94.4
Evidence status
confirmed · 69% mass
General preference
94.8
Coding
92.7
Agents & tools
—
Reasoning
—
Evidence breadth
92%
Evidence coverage
38%
Market and catalogue signals · secondary, never the language Index rank
Usage (OpenRouter popularity)
20.4
Liquidity (providers × uptime)
35.0
Open reach (HF downloads)
—
Surface (context / tools / modalities)
100.0
Freshness
99.2
  • · OpenRouter popularity #93
  • · 1 live provider
  • · Catalogue: context 1048576, reasoning, tools, modalities Text/Image/Video/File/Audio
  • · First seen 2026-08-05

These adoption and deployment observations remain context only. They do not change this model's ModelCap Index score or rank.

BES evidence selected · measured input only

The bounded 0–100 capability score blends each source’s competitive placement with its published achievement, then combines capability families. Evidence breadth adds a modest uncertainty adjustment; price and popularity are not part of benchmark-led rank.

Deployment readiness

Metadata index
37.4
limited · 56% metadata coverage
Not capability
Artifact reproducibility
0.0
Access & legal clarity
30.3
Deployability
74.7
Evaluation provenance
44.8

Missing: artifactReproducibility.revision-sha, artifactReproducibility.architecture-and-model-type, artifactReproducibility.parameter-count, artifactReproducibility.serialized-weight-format, artifactReproducibility.base-lineage, accessLegalClarity.declared-license, accessLegalClarity.resolvable-license-terms, evaluationProvenance.evaluation-dataset-revisions.

A metadata completeness and deployability index—not a safety certification, quality grade, or production-readiness claim.

Market activity

Venue coverage
Market Gravity
32.5
OpenRouter weekly popularity
#93 of 298

Market Gravity uses OpenRouter’s full-catalogue popularity order. Sparse Vercel top-ten observations appear only when published and do not affect the score.

Arena preference

Configuration results available

Arena has published current community results for X-High. No default-configuration result is published, so the raw Arena field stays configuration-specific. The strongest supported result can still inform ModelCap Score with reduced confidence.

Current board through 6 Aug 2026, 13:00 UTC

Market Gravity breakdown

Usage55%
20.4

OpenRouter weekly popularity across the full model catalogue.

Liquidity25%
35.0

Independent providers versus the model's open or closed cohort, weighted by uptime.

Open reach15%
50.0

Hugging Face 30-day downloads for open models; neutral for closed models.

Freshness5%
99.2

Time since first public availability, on a six-month half-life.

Specification

Context window
1.0M tokens
Max output
—
Inputs
Text, Image, Video, File, Audio
Outputs
Text
Tokenizer
Other
Cached input tokens
$0.15 / 1M
First seen on OpenRouter
5 Aug 2026

Capabilities

  • Supported: Reasoning
  • Supported: Tool use
  • Supported: Structured output
  • Supported: Response format
  • Supported: Moderated