Noometry

Model comparison

GPT-6 Astra vs Muse Glimmer

GPT-6 Astra is the stronger model overall, scoring 70.8 to 41.7 on the Noometry Index.

Last verified . 15 shared benchmarks.

GPT-6 Astra OpenAI

70.8

Rank #1 Confirmed

Muse Glimmer Meta

41.7

Rank #131 Confirmed

Summary

  • They share 15 benchmarks with published results for both. GPT-6 Astra scores higher in 8 categories and Muse Glimmer in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GPT-6 Astra leads 85.1 to 25.7.
  • The biggest single-benchmark swing is CritPt: 31.7% for GPT-6 Astra and 2.6% for Muse Glimmer.
  • Muse Glimmer has downloadable open weights; the other is API-only.

Side by side

GPT-6 AstraMuse Glimmer
ProviderOpenAIMeta
Noometry Index70.841.7
Released2026-09-032026-08-10
WeightsProprietaryOpen
Context window1.05M—
Max output128K—
Input $ / M tokens$10—
Output $ / M tokens$50—
Results tracked5615

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Category by category

Coding GPT-6 Astra leads

GPT-6 Astra: 73.7 (#2), Muse Glimmer: 40.4 (#142)

BenchmarkGPT-6 AstraMuse Glimmer
LMArena WebDev17861355
SciCode56.5%44.9%
LMArena Coding14871416
DeepSWE74.1%—
FrontierCode53.3%—
FrontierSWE65.5%—
GSO79.4%—
WeirdML93.6%—
MirrorCode46.7%—
ALE-Bench2,951—

Agentic & Tool Use Not comparable

GPT-6 Astra: 52.9 (#3), Muse Glimmer: —

BenchmarkGPT-6 AstraMuse Glimmer
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 Glimmer: 25.7 (#144)

BenchmarkGPT-6 AstraMuse Glimmer
CritPt31.7%2.6%
LMArena Hard Prompts14621396
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—
Epoch Capabilities Index166.45—

Math GPT-6 Astra leads

GPT-6 Astra: 93.5 (#2), Muse Glimmer: 38.8 (#125)

BenchmarkGPT-6 AstraMuse Glimmer
LMArena Math14651417
FrontierMath (Tiers 1-3)93.7%—
FrontierMath Tier 497.6%—
OTIS Mock AIME 2024-2025100%—
ProofBench99%—
FrontierMath Erdős2.9%—

Knowledge GPT-6 Astra leads

GPT-6 Astra: 75.3 (#1), Muse Glimmer: 38.5 (#143)

BenchmarkGPT-6 AstraMuse Glimmer
LMArena Expert14831386
GPQA Diamond95.8%—
Humanity's Last Exam54.8%—
SimpleQA Verified75.6%—
Vectara Hallucination Rate8.7%—

Multimodal Not comparable

GPT-6 Astra: 55.0 (#3), Muse Glimmer: —

BenchmarkGPT-6 AstraMuse Glimmer
LMArena Vision1281—
Blueprint-Bench 249.7%—
Furniture Assembly80%—
LMArena Document1468—

Multilingual GPT-6 Astra leads

GPT-6 Astra: 53.7 (#61), Muse Glimmer: 50.5 (#122)

BenchmarkGPT-6 AstraMuse Glimmer
LMArena Non-English14301384
LMArena Chinese14841412
LMArena Russian14361390
LMArena French1456—
LMArena German1440—
LMArena Japanese1379—
LMArena Korean1426—
LMArena Spanish1407—

Instruction Following GPT-6 Astra leads

GPT-6 Astra: 76.3 (#44), Muse Glimmer: 72.6 (#135)

BenchmarkGPT-6 AstraMuse Glimmer
LMArena Instruction Following14501375

Long Context GPT-6 Astra leads

GPT-6 Astra: 44.5 (#62), Muse Glimmer: 42.1 (#129)

BenchmarkGPT-6 AstraMuse Glimmer
LMArena Longer Query14561382

Writing & Preference GPT-6 Astra leads

GPT-6 Astra: 75.3 (#7), Muse Glimmer: 57.5 (#126)

BenchmarkGPT-6 AstraMuse Glimmer
LMArena Text14411389
LMArena Creative Writing14181339
LMArena Multi-Turn14481399
EQ-Bench Creative Writing2173—

Frequently asked questions

Is GPT-6 Astra better than Muse Glimmer?

GPT-6 Astra is the stronger model overall, scoring 70.8 to 41.7 on the Noometry Index.

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

GPT-6 Astra scores higher on coding benchmarks: 73.7 versus 40.4 in the Noometry coding category.

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

15 benchmarks have published results for both models. GPT-6 Astra has 56 scored results on Noometry and Muse Glimmer has 15.

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