Noometry

Model comparison

Claude Opus 4.1 vs Muse Spark

Muse Spark is the stronger model overall, scoring 50.6 to 41.0 on the Noometry Index.

Last verified . 22 shared benchmarks.

Claude Opus 4.1 Anthropic

41.0

Rank #142 Confirmed

Muse Spark Meta

50.6

Rank #46 Confirmed

Summary

  • They share 22 benchmarks with published results for both. Claude Opus 4.1 scores higher in 1 category and Muse Spark in 8 categories; 7 gaps are clear of the uncertainty.
  • The widest gap is in math, where Muse Spark leads 47.8 to 22.3.
  • The biggest single-benchmark swing is Humanity's Last Exam: 11.5% for Claude Opus 4.1 and 40.6% for Muse Spark.

Side by side

Claude Opus 4.1Muse Spark
ProviderAnthropicMeta
Noometry Index41.050.6
Released2025-08-052026-04-08
WeightsProprietaryProprietary
Context window200K—
Max output32K—
Input $ / M tokens$15—
Output $ / M tokens$75—
Results tracked4827

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Category by category

Coding Muse Spark leads

Claude Opus 4.1: 44.4 (#73), Muse Spark: 46.2 (#69)

BenchmarkClaude Opus 4.1Muse Spark
LMArena Coding14791481
SWE-bench Verified73.3%—
LMArena WebDev1390—
SciCode—51.5%
WeirdML45.9%—
ALE-Bench674.77—
AlgoTune1.34—

Agentic & Tool Use Not comparable

Claude Opus 4.1: 35.0 (#41), Muse Spark: —

BenchmarkClaude Opus 4.1Muse Spark
Terminal-Bench38%—
GDPval43.6%—
Cybench42%—
DeepResearch Bench48.3%—
LMArena Search1148—
METR Time Horizons66.8%—

Reasoning Muse Spark leads

Claude Opus 4.1: 32.2 (#76), Muse Spark: 35.9 (#67)

BenchmarkClaude Opus 4.1Muse Spark
LMArena Hard Prompts14431474
Epoch Capabilities Index144.12152.04
SimpleBench60%—
CritPt—11.3%
Chess Puzzles7%—
EnigmaEval7.2%—
EBR-Bench7.9%—
Mystery Game Puzzles21%—
DTBench80%—
LMCA37.1%—
ForecastBench62—

Math Muse Spark leads

Claude Opus 4.1: 22.3 (#277), Muse Spark: 47.8 (#66)

BenchmarkClaude Opus 4.1Muse Spark
OTIS Mock AIME 2024-202568.9%88.9%
LMArena Math14311455
FrontierMath (Feb 2025 set)7.2%39%
FrontierMath Tier 4 (v1)4.2%14.6%
FrontierMath (Tiers 1-3)12.6%—
FrontierMath Tier 42.4%—
ProofBench—17%

Knowledge Muse Spark leads

Claude Opus 4.1: 42.0 (#101), Muse Spark: 65.7 (#13)

BenchmarkClaude Opus 4.1Muse Spark
GPQA Diamond77.3%89.8%
Humanity's Last Exam11.5%40.6%
LMArena Expert14391457
Confabulations17.1%—
Vectara Hallucination Rate11.8%—

Multimodal Muse Spark leads

Claude Opus 4.1: 26.8 (#119), Muse Spark: 43.4 (#24)

BenchmarkClaude Opus 4.1Muse Spark
LMArena Vision—1306
VPCT35%—
LMArena Document—1444

Multilingual Muse Spark leads

Claude Opus 4.1: 52.0 (#95), Muse Spark: 56.1 (#24)

BenchmarkClaude Opus 4.1Muse Spark
LMArena Non-English14051464
LMArena Chinese14271509
LMArena French14311497
LMArena German14131497
LMArena Korean13801459
LMArena Russian14221466
LMArena Spanish14481472
LMArena Japanese1378—

Instruction Following Too close to call

Claude Opus 4.1: 75.6 (#58), Muse Spark: 75.9 (#51)

BenchmarkClaude Opus 4.1Muse Spark
LMArena Instruction Following14351442

Long Context Too close to call

Claude Opus 4.1: 44.5 (#63), Muse Spark: 44.4 (#69)

BenchmarkClaude Opus 4.1Muse Spark
LMArena Longer Query14551451

Writing & Preference Muse Spark leads

Claude Opus 4.1: 62.4 (#74), Muse Spark: 66.0 (#39)

BenchmarkClaude Opus 4.1Muse Spark
LMArena Text14191474
LMArena Creative Writing14121459
LMArena Multi-Turn14441477
Short-Story Creative Writing84.7%—

Frequently asked questions

Is Claude Opus 4.1 better than Muse Spark?

Muse Spark is the stronger model overall, scoring 50.6 to 41.0 on the Noometry Index.

Is Claude Opus 4.1 or Muse Spark better for coding?

Muse Spark scores higher on coding benchmarks: 46.2 versus 44.4 in the Noometry coding category.

How many benchmarks do Claude Opus 4.1 and Muse Spark share?

22 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Muse Spark has 27.

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