Model comparison
Claude Sonnet 4 vs Muse Glimmer
Claude Sonnet 4 and Muse Glimmer score almost the same on the Noometry Index (40.6 vs 41.3), so choose on price, context window or the category you care about most.
Last verified . 12 shared benchmarks.
MetaSummary
- They share 12 benchmarks with published results for both. Claude Sonnet 4 scores higher in 3 categories and Muse Glimmer in 5 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in long context, where Muse Glimmer leads 42.1 to 33.6.
- Muse Glimmer has downloadable open weights; the other is API-only.
Side by side
| Claude Sonnet 4 | Muse Glimmer | |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 40.6 | 41.3 |
| Released | 2025-05-22 | — |
| Weights | Proprietary | Open |
| Context window | 200K | — |
| Max output | 64K | — |
| Input $ / M tokens | $3 | — |
| Output $ / M tokens | $15 | — |
| Results tracked | 58 | 13 |
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Category by category
Coding Claude Sonnet 4 leads
Claude Sonnet 4: 44.0 (#70), Muse Glimmer: 38.7 (#157)
| Benchmark | Claude Sonnet 4 | Muse Glimmer |
|---|---|---|
| LMArena Coding | 1414 | 1417 |
| SWE-bench Verified (bash only) | 64.9% | — |
| Aider Polyglot | 61.3% | — |
| LMArena WebDev | — | 1355 |
| SciCode | 40% | — |
| GSO | 4.9% | — |
| WeirdML | 46.1% | — |
| ALE-Bench | 655.35 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 4: 38.3 (#29), Muse Glimmer: —
| Benchmark | Claude Sonnet 4 | Muse Glimmer |
|---|---|---|
| TheAgentCompany | 33.1% | — |
| Cybench | 35% | — |
| DeepResearch Bench | 46.6% | — |
| OSWorld | 43.9% | — |
| METR Time Horizons | 62% | — |
Reasoning Muse Glimmer leads
Claude Sonnet 4: 23.0 (#169), Muse Glimmer: 27.2 (#111)
| Benchmark | Claude Sonnet 4 | Muse Glimmer |
|---|---|---|
| LMArena Hard Prompts | 1372 | 1395 |
| ARC-AGI-2 | 5.9% | — |
| SimpleBench | 45.5% | — |
| Kagi LLM Benchmark | 73% | — |
| ARC-AGI-1 | 40% | — |
| CritPt | 0.3% | — |
| EnigmaEval | 3.1% | — |
| DTBench | 77.1% | — |
| LMCA | 29% | — |
| Epoch Capabilities Index | 141.69 | — |
| ForecastBench | 60.2 | — |
Math Claude Sonnet 4 leads
Claude Sonnet 4: 41.5 (#71), Muse Glimmer: 36.1 (#128)
| Benchmark | Claude Sonnet 4 | Muse Glimmer |
|---|---|---|
| LMArena Math | 1375 | 1419 |
| OTIS Mock AIME 2024-2025 | 71.1% | — |
| Omni-MATH | 60.2% | — |
| MATH Level 5 | 84.4% | — |
| FrontierMath (Feb 2025 set) | 4.1% | — |
| FrontierMath Tier 4 (v1) | 0% | — |
Knowledge Claude Sonnet 4 leads
Claude Sonnet 4: 41.6 (#99), Muse Glimmer: 37.9 (#140)
| Benchmark | Claude Sonnet 4 | Muse Glimmer |
|---|---|---|
| LMArena Expert | 1371 | 1388 |
| GPQA Diamond | 79.2% | — |
| Humanity's Last Exam | 7.8% | — |
| MMLU-Pro | 84.3% | — |
| Confabulations | 13.2% | — |
| Vectara Hallucination Rate | 10.3% | — |
| GPQA (HELM) | 70.6% | — |
Multimodal Not comparable
Claude Sonnet 4: 25.6 (#116), Muse Glimmer: —
| Benchmark | Claude Sonnet 4 | Muse Glimmer |
|---|---|---|
| LMArena Vision | 1191 | — |
| GeoBench | 37% | — |
| VPCT | 34% | — |
| MindCube | 44.8% | — |
Multilingual Muse Glimmer leads
Claude Sonnet 4: 46.9 (#151), Muse Glimmer: 50.6 (#117)
| Benchmark | Claude Sonnet 4 | Muse Glimmer |
|---|---|---|
| LMArena Non-English | 1333 | 1384 |
| LMArena Chinese | 1351 | 1412 |
| LMArena Russian | 1355 | 1393 |
| LMArena French | 1364 | — |
| LMArena German | 1331 | — |
| LMArena Japanese | 1301 | — |
| LMArena Korean | 1293 | — |
| LMArena Spanish | 1356 | — |
Instruction Following Too close to call
Claude Sonnet 4: 71.8 (#141), Muse Glimmer: 72.7 (#134)
| Benchmark | Claude Sonnet 4 | Muse Glimmer |
|---|---|---|
| LMArena Instruction Following | 1375 | 1374 |
| IFEval | 84% | — |
Long Context Muse Glimmer leads
Claude Sonnet 4: 33.6 (#254), Muse Glimmer: 42.1 (#124)
| Benchmark | Claude Sonnet 4 | Muse Glimmer |
|---|---|---|
| LMArena Longer Query | 1398 | 1381 |
| Fiction.LiveBench | 46.9% | — |
Writing & Preference Too close to call
Claude Sonnet 4: 57.3 (#127), Muse Glimmer: 57.7 (#122)
| Benchmark | Claude Sonnet 4 | Muse Glimmer |
|---|---|---|
| LMArena Text | 1351 | 1389 |
| LMArena Creative Writing | 1345 | 1338 |
| LMArena Multi-Turn | 1376 | 1398 |
| Short-Story Creative Writing | 81.4% | — |
| EQ-Bench Creative Writing | 1483 | — |
| WildBench | 83.8% | — |
Frequently asked questions
Is Claude Sonnet 4 better than Muse Glimmer?
Claude Sonnet 4 and Muse Glimmer score almost the same on the Noometry Index (40.6 vs 41.3), so choose on price, context window or the category you care about most.
Is Claude Sonnet 4 or Muse Glimmer better for coding?
Claude Sonnet 4 scores higher on coding benchmarks: 44.0 versus 38.7 in the Noometry coding category.
How many benchmarks do Claude Sonnet 4 and Muse Glimmer share?
12 benchmarks have published results for both models. Claude Sonnet 4 has 58 scored results on Noometry and Muse Glimmer has 13.