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ModelCap

Muse Spark 1.1

All-versions archive #8Arena #11API only

Meta·meta/muse-spark-1.1

Muse Spark 1.1 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 · All-versions archive
87.8#8
Measured · 86% support · score interval 87.8–94.0
Market Gravity
37.2
Secondary market signal

Superseded by Muse Spark 1.2. It no longer holds a current-board position; its all-versions archive rank is #8.

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.

EffortAgent scoreSource rankSampleSource
Default
Muse Spark 1.1
0.60%
CI -0.0–1.2%
#221.9M obs
58K sessions
LMArena Agent
Match 100%

Other versions (1)

ModelCap Index · All-versions archive

Methodology
87.8
Measured · 3 public benchmark observations across 3 boards
All-versions archive
#8
Public rank basis
Measured (measured)
Index support
85.9% · strong
Index interval
87.8–94.0
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-1.1 · aggregates disclosed benchmark configurations · endpoint configuration not claimed
Direct benchmark observations
3
Breadth-adjusted BES point estimate
90.9
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
90.9
Evidence status
confirmed · 94% mass
General preference
93.3
Coding
94.0
Agents & tools
51.9
Reasoning
—
Evidence breadth
97%
Evidence coverage
86%
Market and catalogue signals · secondary, never the language Index rank
Usage (OpenRouter popularity)
24.9
Liquidity (providers × uptime)
45.6
Open reach (HF downloads)
—
Surface (context / tools / modalities)
100.0
Freshness
91.9
  • · OpenRouter popularity #72
  • · 1 live provider
  • · Catalogue: context 1048576, reasoning, tools, modalities Text/Image/Video/File/Audio
  • · First seen 2026-07-16

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
43.5
limited · 56% metadata coverage
Not capability
Artifact reproducibility
0.0
Access & legal clarity
30.3
Deployability
74.7
Evaluation provenance
75.3

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
37.2
OpenRouter weekly popularity
#72 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

Status
Ranked
Source
Arena
Official rank
#11 of 385
Rating
1487.5
95% confidence interval
1482–1493
Votes
14K
Source snapshot
6 Aug 2026, 13:00 UTC
Category
overall
Identity match confidence
100%

Market Gravity breakdown

Usage55%
24.9

OpenRouter weekly popularity across the full model catalogue.

Liquidity25%
45.6

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%
91.9

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
16 Jul 2026

Capabilities

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