Noometry

Model comparison

GPT-4.5 vs Muse Spark 1.1

Muse Spark 1.1 is the stronger model overall, scoring 49.9 to 36.9 on the Noometry Index.

Last verified . 19 shared benchmarks.

GPT-4.5 OpenAI

36.9

Rank #200 Confirmed

Muse Spark 1.1 Meta

49.9

Rank #43 Confirmed

Summary

  • They share 19 benchmarks with published results for both. GPT-4.5 scores higher in 0 categories and Muse Spark 1.1 in 10 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Muse Spark 1.1 leads 45.9 to 14.1.

Side by side

GPT-4.5Muse Spark 1.1
ProviderOpenAIMeta
Noometry Index36.949.9
Released2025-02-272026-04-08
WeightsProprietaryProprietary
Context window—1.05M
Max output—131K
Input $ / M tokens—$1.25
Output $ / M tokens—$4.25
Results tracked4236

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Category by category

Coding Muse Spark 1.1 leads

GPT-4.5: 41.8 (#102), Muse Spark 1.1: 50.8 (#38)

BenchmarkGPT-4.5Muse Spark 1.1
LMArena Coding13971497
DeepSWE—53.3%
Aider Polyglot44.9%—
LMArena WebDev—1542
SciCode—58.8%
WeirdML39.4%—
LiveBench Coding75.2%—

Agentic & Tool Use Muse Spark 1.1 leads

GPT-4.5: 27.6 (#92), Muse Spark 1.1: 33.9 (#45)

BenchmarkGPT-4.5Muse Spark 1.1
τ²-bench Banking—40.5%
Cybench17.5%—
GBAEval—7.9%
GDP.pdf—15%
Vending-Bench 2—6,520

Reasoning Muse Spark 1.1 leads

GPT-4.5: 14.1 (#320), Muse Spark 1.1: 45.9 (#41)

BenchmarkGPT-4.5Muse Spark 1.1
LMArena Hard Prompts14041486
Epoch Capabilities Index136.74154.32
ARC-AGI-20.8%—
SimpleBench34.5%—
NYT Connections (extended)—84.9%
ARC-AGI-110.3%—
CritPt—15.1%
EnigmaEval3.2%—
LiveBench Reasoning71.1%—
DTBench—94.4%
LiveBench Data Analysis64.3%—
LMCA—49.9%
Surface Evolver Bench—52.5%
ForecastBench61.7—
LiveBench69%—

Math Muse Spark 1.1 leads

GPT-4.5: 31.0 (#200), Muse Spark 1.1: 44.0 (#67)

BenchmarkGPT-4.5Muse Spark 1.1
LMArena Math14121477
OTIS Mock AIME 2024-202537.8%—
ProofBench—39%
LiveBench Math69.3%—
MATH Level 578.6%—

Knowledge Muse Spark 1.1 leads

GPT-4.5: 32.4 (#205), Muse Spark 1.1: 52.8 (#55)

BenchmarkGPT-4.5Muse Spark 1.1
LMArena Expert13941480
GPQA Diamond68.7%—
Humanity's Last Exam5.4%—
SimpleQA Verified—57.8%
Confabulations13.6%—

Multimodal Muse Spark 1.1 leads

GPT-4.5: 37.0 (#68), Muse Spark 1.1: 41.9 (#28)

BenchmarkGPT-4.5Muse Spark 1.1
LMArena Vision11951292
VPCT45%—
LMArena Document—1465

Multilingual Muse Spark 1.1 leads

GPT-4.5: 52.7 (#78), Muse Spark 1.1: 56.8 (#16)

BenchmarkGPT-4.5Muse Spark 1.1
LMArena Non-English14131471
LMArena Chinese14211518
LMArena French14171494
LMArena German14571466
LMArena Japanese14161445
LMArena Korean13921459
LMArena Russian14191482
LMArena Spanish—1471

Instruction Following Muse Spark 1.1 leads

GPT-4.5: 72.8 (#129), Muse Spark 1.1: 76.8 (#36)

BenchmarkGPT-4.5Muse Spark 1.1
LMArena Instruction Following14041457
LiveBench Instruction Following72.3%—

Long Context Muse Spark 1.1 leads

GPT-4.5: 40.4 (#150), Muse Spark 1.1: 44.8 (#55)

BenchmarkGPT-4.5Muse Spark 1.1
LMArena Longer Query14061463
Fiction.LiveBench63.9%—

Writing & Preference Muse Spark 1.1 leads

GPT-4.5: 57.1 (#129), Muse Spark 1.1: 73.6 (#11)

BenchmarkGPT-4.5Muse Spark 1.1
LMArena Text14171479
LMArena Creative Writing13941440
EQ-Bench Creative Writing12581927
LMArena Multi-Turn14441484
Short-Story Creative Writing75.6%—
EQ-Bench 4—1260
LiveBench Language61.5%—

Frequently asked questions

Is GPT-4.5 better than Muse Spark 1.1?

Muse Spark 1.1 is the stronger model overall, scoring 49.9 to 36.9 on the Noometry Index.

Is GPT-4.5 or Muse Spark 1.1 better for coding?

Muse Spark 1.1 scores higher on coding benchmarks: 50.8 versus 41.8 in the Noometry coding category.

How many benchmarks do GPT-4.5 and Muse Spark 1.1 share?

19 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and Muse Spark 1.1 has 36.

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