Noometry

Model comparison

GPT-6 Astra vs Muse Spark

GPT-6 Astra is the stronger model overall, scoring 70.8 to 50.6 on the Noometry Index.

Last verified . 25 shared benchmarks.

GPT-6 Astra OpenAI

70.8

Rank #1 Confirmed

Muse Spark Meta

50.6

Rank #46 Confirmed

Summary

  • They share 25 benchmarks with published results for both. GPT-6 Astra scores higher in 8 categories and Muse Spark in 1 category; 7 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GPT-6 Astra leads 85.1 to 35.9.
  • The biggest single-benchmark swing is ProofBench: 99% for GPT-6 Astra and 17% for Muse Spark.

Side by side

GPT-6 AstraMuse Spark
ProviderOpenAIMeta
Noometry Index70.850.6
Released2026-09-032026-04-08
WeightsProprietaryProprietary
Context window1.05M—
Max output128K—
Input $ / M tokens$10—
Output $ / M tokens$50—
Results tracked5627

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Category by category

Coding GPT-6 Astra leads

GPT-6 Astra: 73.7 (#2), Muse Spark: 46.2 (#69)

BenchmarkGPT-6 AstraMuse Spark
SciCode56.5%51.5%
LMArena Coding14871481
DeepSWE74.1%—
FrontierCode53.3%—
LMArena WebDev1786—
FrontierSWE65.5%—
GSO79.4%—
WeirdML93.6%—
MirrorCode46.7%—
ALE-Bench2,951—

Agentic & Tool Use Not comparable

GPT-6 Astra: 52.9 (#3), Muse Spark: —

BenchmarkGPT-6 AstraMuse Spark
APEX-Agents64.7%—
Remote Labor Index20.8%—
BALROG68.3%—
GDP.pdf34.2%—
Vending-Bench 215,515—

Reasoning GPT-6 Astra leads

GPT-6 Astra: 85.1 (#1), Muse Spark: 35.9 (#67)

BenchmarkGPT-6 AstraMuse Spark
CritPt31.7%11.3%
LMArena Hard Prompts14621474
Epoch Capabilities Index166.45152.04
ARC-AGI-295%—
NYT Connections (extended)98.1%—
ARC-AGI-198.5%—
Chess Puzzles72%—
EBR-Bench76.2%—
Mystery Game Puzzles84%—
DTBench97.3%—
LMCA64.4%—
Bench to the Future 30.14—

Math GPT-6 Astra leads

GPT-6 Astra: 93.5 (#2), Muse Spark: 47.8 (#66)

BenchmarkGPT-6 AstraMuse Spark
OTIS Mock AIME 2024-2025100%88.9%
ProofBench99%17%
LMArena Math14651455
FrontierMath (Tiers 1-3)93.7%—
FrontierMath Tier 497.6%—
FrontierMath (Feb 2025 set)—39%
FrontierMath Erdős2.9%—
FrontierMath Tier 4 (v1)—14.6%

Knowledge GPT-6 Astra leads

GPT-6 Astra: 75.3 (#1), Muse Spark: 65.7 (#13)

BenchmarkGPT-6 AstraMuse Spark
GPQA Diamond95.8%89.8%
Humanity's Last Exam54.8%40.6%
LMArena Expert14831457
SimpleQA Verified75.6%—
Vectara Hallucination Rate8.7%—

Multimodal GPT-6 Astra leads

GPT-6 Astra: 55.0 (#3), Muse Spark: 43.4 (#24)

BenchmarkGPT-6 AstraMuse Spark
LMArena Vision12811306
LMArena Document14681444
Blueprint-Bench 249.7%—
Furniture Assembly80%—

Multilingual Muse Spark leads

GPT-6 Astra: 53.7 (#61), Muse Spark: 56.1 (#24)

BenchmarkGPT-6 AstraMuse Spark
LMArena Non-English14301464
LMArena Chinese14841509
LMArena French14561497
LMArena German14401497
LMArena Korean14261459
LMArena Russian14361466
LMArena Spanish14071472
LMArena Japanese1379—

Instruction Following Too close to call

GPT-6 Astra: 76.3 (#44), Muse Spark: 75.9 (#51)

BenchmarkGPT-6 AstraMuse Spark
LMArena Instruction Following14501442

Long Context Too close to call

GPT-6 Astra: 44.5 (#62), Muse Spark: 44.4 (#69)

BenchmarkGPT-6 AstraMuse Spark
LMArena Longer Query14561451

Writing & Preference GPT-6 Astra leads

GPT-6 Astra: 75.3 (#7), Muse Spark: 66.0 (#39)

BenchmarkGPT-6 AstraMuse Spark
LMArena Text14411474
LMArena Creative Writing14181459
LMArena Multi-Turn14481477
EQ-Bench Creative Writing2173—

Frequently asked questions

Is GPT-6 Astra better than Muse Spark?

GPT-6 Astra is the stronger model overall, scoring 70.8 to 50.6 on the Noometry Index.

Is GPT-6 Astra or Muse Spark better for coding?

GPT-6 Astra scores higher on coding benchmarks: 73.7 versus 46.2 in the Noometry coding category.

How many benchmarks do GPT-6 Astra and Muse Spark share?

25 benchmarks have published results for both models. GPT-6 Astra has 56 scored results on Noometry and Muse Spark has 27.

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