Noometry

Model comparison

GPT-5.5 Instant vs Muse Spark 1.1

Muse Spark 1.1 is the stronger model overall, scoring 49.9 to 42.7 on the Noometry Index.

Last verified . 22 shared benchmarks.

GPT-5.5 Instant OpenAI

42.7

Rank #110 Confirmed

Muse Spark 1.1 Meta

49.9

Rank #51 Confirmed

Summary

  • They share 22 benchmarks with published results for both. GPT-5.5 Instant scores higher in 0 categories and Muse Spark 1.1 in 9 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Muse Spark 1.1 leads 47.1 to 24.9.
  • The biggest single-benchmark swing is CritPt: 0% for GPT-5.5 Instant and 15.1% for Muse Spark 1.1.

Side by side

GPT-5.5 InstantMuse Spark 1.1
ProviderOpenAIMeta
Noometry Index42.749.9
Released2026-05-052026-04-08
WeightsProprietaryProprietary
Context window—1.05M
Max output—131K
Input $ / M tokens—$1.25
Output $ / M tokens—$4.25
Results tracked2737

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Category by category

Coding Muse Spark 1.1 leads

GPT-5.5 Instant: 44.3 (#74), Muse Spark 1.1: 51.3 (#40)

BenchmarkGPT-5.5 InstantMuse Spark 1.1
SciCode48.6%58.8%
LMArena Coding14331498
DeepSWE—53.3%
LMArena WebDev—1542

Agentic & Tool Use Not comparable

GPT-5.5 Instant: —, Muse Spark 1.1: 30.8 (#73)

BenchmarkGPT-5.5 InstantMuse Spark 1.1
APEX-Agents—31.8%
τ²-bench Banking—40.5%
GBAEval—7.9%
GDP.pdf—15%
Vending-Bench 2—6,520

Reasoning Muse Spark 1.1 leads

GPT-5.5 Instant: 24.9 (#155), Muse Spark 1.1: 47.1 (#44)

BenchmarkGPT-5.5 InstantMuse Spark 1.1
CritPt0%15.1%
LMArena Hard Prompts14261486
Epoch Capabilities Index142.52154.21
NYT Connections (extended)—84.9%
Chess Puzzles12%—
DTBench—94.4%
LMCA—49.9%
Surface Evolver Bench—52.5%

Math Muse Spark 1.1 leads

GPT-5.5 Instant: 26.5 (#259), Muse Spark 1.1: 45.5 (#76)

BenchmarkGPT-5.5 InstantMuse Spark 1.1
LMArena Math14201483
FrontierMath (Tiers 1-3)26.3%—
FrontierMath Tier 42.4%—
OTIS Mock AIME 2024-202568.1%—
ProofBench—39%

Knowledge Muse Spark 1.1 leads

GPT-5.5 Instant: 48.9 (#74), Muse Spark 1.1: 53.1 (#59)

BenchmarkGPT-5.5 InstantMuse Spark 1.1
LMArena Expert14091478
GPQA Diamond82.5%—
SimpleQA Verified—57.8%

Multimodal Muse Spark 1.1 leads

GPT-5.5 Instant: 40.0 (#52), Muse Spark 1.1: 42.6 (#29)

BenchmarkGPT-5.5 InstantMuse Spark 1.1
LMArena Vision12501293
LMArena Document14031465

Multilingual Muse Spark 1.1 leads

GPT-5.5 Instant: 52.8 (#80), Muse Spark 1.1: 56.7 (#17)

BenchmarkGPT-5.5 InstantMuse Spark 1.1
LMArena Non-English14171472
LMArena Chinese14561518
LMArena French14281494
LMArena German14111466
LMArena Japanese14081451
LMArena Korean13921458
LMArena Russian14311483
LMArena Spanish14291464

Instruction Following Muse Spark 1.1 leads

GPT-5.5 Instant: 74.2 (#100), Muse Spark 1.1: 76.5 (#39)

BenchmarkGPT-5.5 InstantMuse Spark 1.1
LMArena Instruction Following14061457

Long Context Muse Spark 1.1 leads

GPT-5.5 Instant: 43.4 (#96), Muse Spark 1.1: 44.8 (#58)

BenchmarkGPT-5.5 InstantMuse Spark 1.1
LMArena Longer Query14221462

Writing & Preference Muse Spark 1.1 leads

GPT-5.5 Instant: 61.8 (#85), Muse Spark 1.1: 73.4 (#11)

BenchmarkGPT-5.5 InstantMuse Spark 1.1
LMArena Text14191479
LMArena Creative Writing14191437
LMArena Multi-Turn14331485
EQ-Bench Creative Writing—1927
EQ-Bench 4—1260

Frequently asked questions

Is GPT-5.5 Instant better than Muse Spark 1.1?

Muse Spark 1.1 is the stronger model overall, scoring 49.9 to 42.7 on the Noometry Index.

Is GPT-5.5 Instant or Muse Spark 1.1 better for coding?

Muse Spark 1.1 scores higher on coding benchmarks: 51.3 versus 44.3 in the Noometry coding category.

How many benchmarks do GPT-5.5 Instant and Muse Spark 1.1 share?

22 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Muse Spark 1.1 has 37.

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