Noometry

Model comparison

GPT-6.1 Sol vs Muse Spark

GPT-6.1 Sol is the stronger model overall, scoring 65.6 to 50.6 on the Noometry Index.

Last verified . 19 shared benchmarks.

GPT-6.1 Sol OpenAI

65.6

Rank #6 Confirmed

Muse Spark Meta

50.6

Rank #46 Confirmed

Summary

  • They share 19 benchmarks with published results for both. GPT-6.1 Sol scores higher in 7 categories and Muse Spark in 2 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GPT-6.1 Sol leads 81.9 to 35.9.
  • The biggest single-benchmark swing is ProofBench: 99% for GPT-6.1 Sol and 17% for Muse Spark.

Side by side

GPT-6.1 SolMuse Spark
ProviderOpenAIMeta
Noometry Index65.650.6
Released2026-09-292026-04-08
WeightsProprietaryProprietary
Context window1.05M—
Max output128K—
Input $ / M tokens$2—
Output $ / M tokens$10—
Results tracked3427

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Category by category

Coding GPT-6.1 Sol leads

GPT-6.1 Sol: 63.2 (#8), Muse Spark: 46.2 (#69)

BenchmarkGPT-6.1 SolMuse Spark
SciCode55.8%51.5%
LMArena Coding14871481
DeepSWE75.2%—
FrontierCode50.2%—
LMArena WebDev1755—

Agentic & Tool Use Not comparable

GPT-6.1 Sol: 39.6 (#26), Muse Spark: —

BenchmarkGPT-6.1 SolMuse Spark
APEX-Agents60%—
GDP.pdf32%—

Reasoning GPT-6.1 Sol leads

GPT-6.1 Sol: 81.9 (#2), Muse Spark: 35.9 (#67)

BenchmarkGPT-6.1 SolMuse Spark
CritPt31.7%11.3%
LMArena Hard Prompts14661474
Epoch Capabilities Index166.09152.04
ARC-AGI-294.2%—
NYT Connections (extended)95.5%—
ARC-AGI-198.5%—
Chess Puzzles61%—
EBR-Bench54.3%—
Mystery Game Puzzles80%—

Math GPT-6.1 Sol leads

GPT-6.1 Sol: 93.7 (#1), Muse Spark: 47.8 (#66)

BenchmarkGPT-6.1 SolMuse Spark
OTIS Mock AIME 2024-2025100%88.9%
ProofBench99%17%
LMArena Math14641455
FrontierMath (Tiers 1-3)93.7%—
FrontierMath Tier 4100%—
FrontierMath (Feb 2025 set)—39%
FrontierMath Tier 4 (v1)—14.6%

Knowledge GPT-6.1 Sol leads

GPT-6.1 Sol: 71.8 (#4), Muse Spark: 65.7 (#13)

BenchmarkGPT-6.1 SolMuse Spark
GPQA Diamond95.4%89.8%
LMArena Expert15021457
Humanity's Last Exam—40.6%
SimpleQA Verified73.9%—

Multimodal GPT-6.1 Sol leads

GPT-6.1 Sol: 52.7 (#5), Muse Spark: 43.4 (#24)

BenchmarkGPT-6.1 SolMuse Spark
LMArena Vision12881306
Furniture Assembly80%—
LMArena Document—1444

Multilingual Muse Spark leads

GPT-6.1 Sol: 54.3 (#46), Muse Spark: 56.1 (#24)

BenchmarkGPT-6.1 SolMuse Spark
LMArena Non-English14381464
LMArena Chinese14771509
LMArena Russian14551466
LMArena French—1497
LMArena German—1497
LMArena Korean—1459
LMArena Spanish—1472

Instruction Following GPT-6.1 Sol leads

GPT-6.1 Sol: 77.0 (#29), Muse Spark: 75.9 (#51)

BenchmarkGPT-6.1 SolMuse Spark
LMArena Instruction Following14681442

Long Context Too close to call

GPT-6.1 Sol: 44.9 (#54), Muse Spark: 44.4 (#69)

BenchmarkGPT-6.1 SolMuse Spark
LMArena Longer Query14651451

Writing & Preference Muse Spark leads

GPT-6.1 Sol: 63.6 (#63), Muse Spark: 66.0 (#39)

BenchmarkGPT-6.1 SolMuse Spark
LMArena Text14471474
LMArena Creative Writing14321459
LMArena Multi-Turn14491477

Frequently asked questions

Is GPT-6.1 Sol better than Muse Spark?

GPT-6.1 Sol is the stronger model overall, scoring 65.6 to 50.6 on the Noometry Index.

Is GPT-6.1 Sol or Muse Spark better for coding?

GPT-6.1 Sol scores higher on coding benchmarks: 63.2 versus 46.2 in the Noometry coding category.

How many benchmarks do GPT-6.1 Sol and Muse Spark share?

19 benchmarks have published results for both models. GPT-6.1 Sol has 34 scored results on Noometry and Muse Spark has 27.

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