Noometry

Model comparison

Claude Opus 5 vs Muse Glimmer

Claude Opus 5 is the stronger model overall, scoring 67.8 to 41.7 on the Noometry Index.

Last verified . 15 shared benchmarks.

Claude Opus 5 Anthropic

67.8

Rank #4 Confirmed

Muse Glimmer Meta

41.7

Rank #131 Confirmed

Summary

  • They share 15 benchmarks with published results for both. Claude Opus 5 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 Claude Opus 5 leads 77.2 to 25.7.
  • The biggest single-benchmark swing is CritPt: 29.1% for Claude Opus 5 and 2.6% for Muse Glimmer.
  • Muse Glimmer has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5Muse Glimmer
ProviderAnthropicMeta
Noometry Index67.841.7
Released2026-07-242026-08-10
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$5—
Output $ / M tokens$25—
Results tracked5715

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Category by category

Coding Claude Opus 5 leads

Claude Opus 5: 67.5 (#5), Muse Glimmer: 40.4 (#142)

BenchmarkClaude Opus 5Muse Glimmer
LMArena WebDev16911355
SciCode56.4%44.9%
LMArena Coding15341416
DeepSWE73.6%—
FrontierCode53.4%—
CursorBench46.6%—
FrontierSWE52%—
WeirdML91.8%—
ALE-Bench2,165—

Agentic & Tool Use Not comparable

Claude Opus 5: 55.6 (#1), Muse Glimmer: —

BenchmarkClaude Opus 5Muse Glimmer
APEX-Agents65.8%—
OSWorld 2.031.4%—
τ²-bench Banking48.7%—
PostTrainBench35%—
BALROG63.4%—
GBAEval79.6%—
GDP.pdf24%—
Vending-Bench 211,182—

Reasoning Claude Opus 5 leads

Claude Opus 5: 77.2 (#4), Muse Glimmer: 25.7 (#144)

BenchmarkClaude Opus 5Muse Glimmer
CritPt29.1%2.6%
LMArena Hard Prompts15261396
ARC-AGI-290.4%—
SimpleBench80.6%—
NYT Connections (extended)94.3%—
ARC-AGI-197.5%—
Chess Puzzles42%—
EBR-Bench45.7%—
Mystery Game Puzzles59%—
DTBench97.9%—
LMCA64.5%—
Bench to the Future 30.12—
Epoch Capabilities Index162.78—

Math Claude Opus 5 leads

Claude Opus 5: 86.2 (#8), Muse Glimmer: 38.8 (#125)

BenchmarkClaude Opus 5Muse Glimmer
LMArena Math15311417
FrontierMath (Tiers 1-3)85.6%—
FrontierMath Tier 473.2%—
OTIS Mock AIME 2024-202598.9%—
ProofBench99%—

Knowledge Claude Opus 5 leads

Claude Opus 5: 66.8 (#9), Muse Glimmer: 38.5 (#143)

BenchmarkClaude Opus 5Muse Glimmer
LMArena Expert15571386
GPQA Diamond93.9%—
SimpleQA Verified59.9%—

Multimodal Not comparable

Claude Opus 5: 50.8 (#8), Muse Glimmer: —

BenchmarkClaude Opus 5Muse Glimmer
LMArena Vision1319—
Blueprint-Bench 230.4%—
Furniture Assembly60.8%—
LMArena Document1516—

Multilingual Claude Opus 5 leads

Claude Opus 5: 58.8 (#4), Muse Glimmer: 50.5 (#122)

BenchmarkClaude Opus 5Muse Glimmer
LMArena Non-English15011384
LMArena Chinese15741412
LMArena Russian15071390
LMArena French1519—
LMArena German1524—
LMArena Japanese1516—
LMArena Korean1521—
LMArena Spanish1519—

Instruction Following Claude Opus 5 leads

Claude Opus 5: 79.2 (#7), Muse Glimmer: 72.6 (#135)

BenchmarkClaude Opus 5Muse Glimmer
LMArena Instruction Following15171375

Long Context Claude Opus 5 leads

Claude Opus 5: 46.5 (#21), Muse Glimmer: 42.1 (#129)

BenchmarkClaude Opus 5Muse Glimmer
LMArena Longer Query15151382

Writing & Preference Claude Opus 5 leads

Claude Opus 5: 79.2 (#1), Muse Glimmer: 57.5 (#126)

BenchmarkClaude Opus 5Muse Glimmer
LMArena Text15071389
LMArena Creative Writing14911339
LMArena Multi-Turn14991399
EQ-Bench Creative Writing2133—
EQ-Bench 41385—

Frequently asked questions

Is Claude Opus 5 better than Muse Glimmer?

Claude Opus 5 is the stronger model overall, scoring 67.8 to 41.7 on the Noometry Index.

Is Claude Opus 5 or Muse Glimmer better for coding?

Claude Opus 5 scores higher on coding benchmarks: 67.5 versus 40.4 in the Noometry coding category.

How many benchmarks do Claude Opus 5 and Muse Glimmer share?

15 benchmarks have published results for both models. Claude Opus 5 has 57 scored results on Noometry and Muse Glimmer has 15.

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