# Claude Opus 4.1 vs Muse Glimmer

> Claude Opus 4.1 and Muse Glimmer score almost the same on the Noometry Index (41.0 vs 41.7), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/claude-opus-4-1-vs-muse-glimmer
- Last updated: 2026-10-12
- Shared benchmarks: 13

## Summary

- They share 13 benchmarks with published results for both. Claude Opus 4.1 scores higher in 7 categories and Muse Glimmer in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Muse Glimmer leads 38.8 to 22.3.
- Muse Glimmer has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Opus 4.1 | Muse Glimmer |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 41.0 | 41.7 |
| Rank | 142 | 131 |
| Context | 200K | — |
| Input $/M | $15 | — |
| Output $/M | $75 | — |
| Weights | Proprietary | Open |

## Coding

- Claude Opus 4.1: 44.4 (#73)
- Muse Glimmer: 40.4 (#142)

| Benchmark | Claude Opus 4.1 | Muse Glimmer |
|---|---|---|
| LMArena WebDev | 1390 | 1355 |
| LMArena Coding | 1479 | 1416 |
| SWE-bench Verified | 73.3% | — |
| SciCode | — | 44.9% |
| WeirdML | 45.9% | — |
| ALE-Bench | 674.77 | — |
| AlgoTune | 1.34 | — |

## Agentic & Tool Use

- Claude Opus 4.1: 35.0 (#41)
- Muse Glimmer: —

| Benchmark | Claude Opus 4.1 | Muse Glimmer |
|---|---|---|
| Terminal-Bench | 38% | — |
| GDPval | 43.6% | — |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| LMArena Search | 1148 | — |
| METR Time Horizons | 66.8% | — |

## Reasoning

- Claude Opus 4.1: 32.2 (#76)
- Muse Glimmer: 25.7 (#144)

| Benchmark | Claude Opus 4.1 | Muse Glimmer |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1396 |
| SimpleBench | 60% | — |
| CritPt | — | 2.6% |
| Chess Puzzles | 7% | — |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| Mystery Game Puzzles | 21% | — |
| DTBench | 80% | — |
| LMCA | 37.1% | — |
| Epoch Capabilities Index | 144.12 | — |
| ForecastBench | 62 | — |

## Math

- Claude Opus 4.1: 22.3 (#277)
- Muse Glimmer: 38.8 (#125)

| Benchmark | Claude Opus 4.1 | Muse Glimmer |
|---|---|---|
| LMArena Math | 1431 | 1417 |
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.9% | — |
| FrontierMath (Feb 2025 set) | 7.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Claude Opus 4.1: 42.0 (#101)
- Muse Glimmer: 38.5 (#143)

| Benchmark | Claude Opus 4.1 | Muse Glimmer |
|---|---|---|
| LMArena Expert | 1439 | 1386 |
| GPQA Diamond | 77.3% | — |
| Humanity's Last Exam | 11.5% | — |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |

## Multimodal

- Claude Opus 4.1: 26.8 (#119)
- Muse Glimmer: —

| Benchmark | Claude Opus 4.1 | Muse Glimmer |
|---|---|---|
| VPCT | 35% | — |

## Multilingual

- Claude Opus 4.1: 52.0 (#95)
- Muse Glimmer: 50.5 (#122)

| Benchmark | Claude Opus 4.1 | Muse Glimmer |
|---|---|---|
| LMArena Non-English | 1405 | 1384 |
| LMArena Chinese | 1427 | 1412 |
| LMArena Russian | 1422 | 1390 |
| LMArena French | 1431 | — |
| LMArena German | 1413 | — |
| LMArena Japanese | 1378 | — |
| LMArena Korean | 1380 | — |
| LMArena Spanish | 1448 | — |

## Instruction Following

- Claude Opus 4.1: 75.6 (#58)
- Muse Glimmer: 72.6 (#135)

| Benchmark | Claude Opus 4.1 | Muse Glimmer |
|---|---|---|
| LMArena Instruction Following | 1435 | 1375 |

## Long Context

- Claude Opus 4.1: 44.5 (#63)
- Muse Glimmer: 42.1 (#129)

| Benchmark | Claude Opus 4.1 | Muse Glimmer |
|---|---|---|
| LMArena Longer Query | 1455 | 1382 |

## Writing & Preference

- Claude Opus 4.1: 62.4 (#74)
- Muse Glimmer: 57.5 (#126)

| Benchmark | Claude Opus 4.1 | Muse Glimmer |
|---|---|---|
| LMArena Text | 1419 | 1389 |
| LMArena Creative Writing | 1412 | 1339 |
| LMArena Multi-Turn | 1444 | 1399 |
| Short-Story Creative Writing | 84.7% | — |

## FAQ

### Is Claude Opus 4.1 better than Muse Glimmer?

Claude Opus 4.1 and Muse Glimmer score almost the same on the Noometry Index (41.0 vs 41.7), so choose on price, context window or the category you care about most.

### Is Claude Opus 4.1 or Muse Glimmer better for coding?

Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 40.4 in the Noometry coding category.

### How many benchmarks do Claude Opus 4.1 and Muse Glimmer share?

13 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Muse Glimmer has 15.