Noometry

Model comparison

GPT-4.1 nano vs Muse Spark

Muse Spark is the stronger model overall, scoring 50.3 to 27.7 on the Noometry Index.

Last verified . 20 shared benchmarks.

GPT-4.1 nano OpenAI

27.7

Rank #322 Confirmed

Muse Spark Meta

50.3

Rank #41 Confirmed

Summary

  • They share 20 benchmarks with published results for both. GPT-4.1 nano scores higher in 0 categories and Muse Spark in 9 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where Muse Spark leads 65.7 to 21.8.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 28.9% for GPT-4.1 nano and 88.9% for Muse Spark.

Side by side

GPT-4.1 nanoMuse Spark
ProviderOpenAIMeta
Noometry Index27.750.3
Released2025-04-142026-04-08
WeightsProprietaryProprietary
Context window1.05M—
Max output33K—
Input $ / M tokens$0.10—
Output $ / M tokens$0.40—
Results tracked3827

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Category by category

Coding Muse Spark leads

GPT-4.1 nano: 23.8 (#325), Muse Spark: 45.6 (#65)

BenchmarkGPT-4.1 nanoMuse Spark
SciCode25.9%51.5%
LMArena Coding13061482
Aider Polyglot8.9%—
WeirdML19%—

Agentic & Tool Use Not comparable

GPT-4.1 nano: 26.3 (#98), Muse Spark: —

BenchmarkGPT-4.1 nanoMuse Spark
Berkeley Function Calling Leaderboard33%—

Reasoning Muse Spark leads

GPT-4.1 nano: 8.6 (#344), Muse Spark: 34.9 (#61)

BenchmarkGPT-4.1 nanoMuse Spark
CritPt0%11.3%
LMArena Hard Prompts12861475
Epoch Capabilities Index129.62152.09
ARC-AGI-20%—
Kagi LLM Benchmark33.3%—
ARC-AGI-10%—
DTBench52.5%—
LMCA5.5%—

Math Muse Spark leads

GPT-4.1 nano: 25.5 (#246), Muse Spark: 46.8 (#57)

BenchmarkGPT-4.1 nanoMuse Spark
OTIS Mock AIME 2024-202528.9%88.9%
LMArena Math12741455
FrontierMath (Feb 2025 set)1%39%
ProofBench—17%
Omni-MATH36.7%—
MATH Level 570%—
FrontierMath Tier 4 (v1)—14.6%

Knowledge Muse Spark leads

GPT-4.1 nano: 21.8 (#268), Muse Spark: 65.7 (#12)

BenchmarkGPT-4.1 nanoMuse Spark
GPQA Diamond48.9%89.8%
LMArena Expert12721458
Humanity's Last Exam—40.6%
SimpleQA Verified6%—
MMLU-Pro55%—
GPQA (HELM)50.7%—

Multimodal Muse Spark leads

GPT-4.1 nano: 28.6 (#108), Muse Spark: 42.7 (#23)

BenchmarkGPT-4.1 nanoMuse Spark
LMArena Vision10631306
LMArena Document—1444

Multilingual Muse Spark leads

GPT-4.1 nano: 41.8 (#200), Muse Spark: 56.3 (#23)

BenchmarkGPT-4.1 nanoMuse Spark
LMArena Non-English12601464
LMArena Chinese12701507
LMArena German12881497
LMArena Russian12611467
LMArena French—1497
LMArena Japanese1199—
LMArena Korean—1457
LMArena Spanish—1471

Instruction Following Muse Spark leads

GPT-4.1 nano: 68.0 (#188), Muse Spark: 76.1 (#47)

BenchmarkGPT-4.1 nanoMuse Spark
LMArena Instruction Following12671443
IFEval84.3%—

Long Context Muse Spark leads

GPT-4.1 nano: 23.7 (#291), Muse Spark: 44.4 (#65)

BenchmarkGPT-4.1 nanoMuse Spark
LMArena Longer Query12831451
Fiction.LiveBench25%—

Writing & Preference Muse Spark leads

GPT-4.1 nano: 40.7 (#238), Muse Spark: 66.2 (#37)

BenchmarkGPT-4.1 nanoMuse Spark
LMArena Text12851474
LMArena Creative Writing12601460
LMArena Multi-Turn12771477
EQ-Bench Creative Writing946—
WildBench81.2%—

Frequently asked questions

Is GPT-4.1 nano better than Muse Spark?

Muse Spark is the stronger model overall, scoring 50.3 to 27.7 on the Noometry Index.

Is GPT-4.1 nano or Muse Spark better for coding?

Muse Spark scores higher on coding benchmarks: 45.6 versus 23.8 in the Noometry coding category.

How many benchmarks do GPT-4.1 nano and Muse Spark share?

20 benchmarks have published results for both models. GPT-4.1 nano has 38 scored results on Noometry and Muse Spark has 27.

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