Noometry

Model comparison

GPT-5.4 mini vs Muse Glimmer

GPT-5.4 mini is the stronger model overall, scoring 44.8 to 41.3 on the Noometry Index.

Last verified . 13 shared benchmarks.

GPT-5.4 mini OpenAI

44.8

Rank #69 Confirmed

Muse Glimmer Meta

41.3

Rank #128 Confirmed

Summary

  • They share 13 benchmarks with published results for both. GPT-5.4 mini scores higher in 8 categories and Muse Glimmer in 0 categories; 7 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where GPT-5.4 mini leads 51.4 to 37.9.
  • Muse Glimmer has downloadable open weights; the other is API-only.

Side by side

GPT-5.4 miniMuse Glimmer
ProviderOpenAIMeta
Noometry Index44.841.3
Released2026-03-17—
WeightsProprietaryOpen
Context window400K—
Max output128K—
Input $ / M tokens$0.75—
Output $ / M tokens$4.50—
Results tracked4613

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Category by category

Coding GPT-5.4 mini leads

GPT-5.4 mini: 45.0 (#67), Muse Glimmer: 38.7 (#157)

BenchmarkGPT-5.4 miniMuse Glimmer
LMArena WebDev13971355
LMArena Coding14381417
FrontierCode27%—
SciCode49.9%—
WeirdML60.3%—
ALE-Bench1,189—

Agentic & Tool Use Not comparable

GPT-5.4 mini: 29.6 (#74), Muse Glimmer: —

BenchmarkGPT-5.4 miniMuse Glimmer
DeepResearch Bench36.3%—

Reasoning GPT-5.4 mini leads

GPT-5.4 mini: 30.3 (#77), Muse Glimmer: 27.2 (#111)

BenchmarkGPT-5.4 miniMuse Glimmer
LMArena Hard Prompts14241395
ARC-AGI-218.9%—
Kagi LLM Benchmark37.9%—
NYT Connections (extended)61.8%—
ARC-AGI-163.7%—
CritPt10%—
Chess Puzzles24%—
Thematic Generalization61.7%—
Mystery Game Puzzles11%—
DTBench80%—
LMCA40.8%—
Epoch Capabilities Index148.83—
ForecastBench57—

Math GPT-5.4 mini leads

GPT-5.4 mini: 45.4 (#63), Muse Glimmer: 36.1 (#128)

BenchmarkGPT-5.4 miniMuse Glimmer
LMArena Math14181419
FrontierMath (Tiers 1-3)51.2%—
FrontierMath Tier 49.8%—
OTIS Mock AIME 2024-202588.9%—
ProofBench21%—
FrontierMath (Feb 2025 set)28.3%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge GPT-5.4 mini leads

GPT-5.4 mini: 51.4 (#62), Muse Glimmer: 37.9 (#140)

BenchmarkGPT-5.4 miniMuse Glimmer
LMArena Expert14341388
GPQA Diamond86.9%—
SimpleQA Verified29.4%—
Vectara Hallucination Rate5.5%—

Multimodal Not comparable

GPT-5.4 mini: 39.0 (#51), Muse Glimmer: —

BenchmarkGPT-5.4 miniMuse Glimmer
LMArena Vision1245—

Multilingual GPT-5.4 mini leads

GPT-5.4 mini: 52.1 (#94), Muse Glimmer: 50.6 (#117)

BenchmarkGPT-5.4 miniMuse Glimmer
LMArena Non-English14051384
LMArena Chinese14461412
LMArena Russian14171393
LMArena French1440—
LMArena German1407—
LMArena Japanese1375—
LMArena Korean1369—
LMArena Spanish1403—

Instruction Following GPT-5.4 mini leads

GPT-5.4 mini: 74.3 (#99), Muse Glimmer: 72.7 (#134)

BenchmarkGPT-5.4 miniMuse Glimmer
LMArena Instruction Following14051374

Long Context Too close to call

GPT-5.4 mini: 42.9 (#107), Muse Glimmer: 42.1 (#124)

BenchmarkGPT-5.4 miniMuse Glimmer
LMArena Longer Query14071381

Writing & Preference GPT-5.4 mini leads

GPT-5.4 mini: 64.2 (#56), Muse Glimmer: 57.7 (#122)

BenchmarkGPT-5.4 miniMuse Glimmer
LMArena Text14111389
LMArena Creative Writing13701338
LMArena Multi-Turn14291398
EQ-Bench Creative Writing1665—

Frequently asked questions

Is GPT-5.4 mini better than Muse Glimmer?

GPT-5.4 mini is the stronger model overall, scoring 44.8 to 41.3 on the Noometry Index.

Is GPT-5.4 mini or Muse Glimmer better for coding?

GPT-5.4 mini scores higher on coding benchmarks: 45.0 versus 38.7 in the Noometry coding category.

How many benchmarks do GPT-5.4 mini and Muse Glimmer share?

13 benchmarks have published results for both models. GPT-5.4 mini has 46 scored results on Noometry and Muse Glimmer has 13.

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