# Claude Opus 4.1 vs Muse Spark

> Muse Spark is the stronger model overall, scoring 50.3 to 40.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-1-vs-muse-spark
- Last updated: 2026-10-10
- Shared benchmarks: 22

## Summary

- They share 22 benchmarks with published results for both. Claude Opus 4.1 scores higher in 1 category and Muse Spark in 8 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where Muse Spark leads 46.8 to 22.0.
- The biggest single-benchmark swing is Humanity's Last Exam: 11.5% for Claude Opus 4.1 and 40.6% for Muse Spark.

## Snapshot

| | Claude Opus 4.1 | Muse Spark |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 40.8 | 50.3 |
| Rank | 136 | 41 |
| Context | 200K | — |
| Input $/M | $15 | — |
| Output $/M | $75 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4.1: 44.3 (#69)
- Muse Spark: 45.6 (#65)

| Benchmark | Claude Opus 4.1 | Muse Spark |
|---|---|---|
| LMArena Coding | 1479 | 1482 |
| SWE-bench Verified | 73.3% | — |
| LMArena WebDev | 1390 | — |
| SciCode | — | 51.5% |
| WeirdML | 45.9% | — |
| ALE-Bench | 674.77 | — |
| AlgoTune | 1.34 | — |

## Agentic & Tool Use

- Claude Opus 4.1: 34.8 (#38)
- Muse Spark: —

| Benchmark | Claude Opus 4.1 | Muse Spark |
|---|---|---|
| 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: 31.6 (#70)
- Muse Spark: 34.9 (#61)

| Benchmark | Claude Opus 4.1 | Muse Spark |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1475 |
| Epoch Capabilities Index | 144.11 | 152.09 |
| SimpleBench | 60% | — |
| CritPt | — | 11.3% |
| Chess Puzzles | 7% | — |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| Mystery Game Puzzles | 21% | — |
| DTBench | 80% | — |
| LMCA | 37.1% | — |
| ForecastBench | 62 | — |

## Math

- Claude Opus 4.1: 22.0 (#267)
- Muse Spark: 46.8 (#57)

| Benchmark | Claude Opus 4.1 | Muse Spark |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 68.9% | 88.9% |
| LMArena Math | 1430 | 1455 |
| FrontierMath (Feb 2025 set) | 7.2% | 39% |
| FrontierMath Tier 4 (v1) | 4.2% | 14.6% |
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| ProofBench | — | 17% |

## Knowledge

- Claude Opus 4.1: 41.9 (#93)
- Muse Spark: 65.7 (#12)

| Benchmark | Claude Opus 4.1 | Muse Spark |
|---|---|---|
| GPQA Diamond | 77.3% | 89.8% |
| Humanity's Last Exam | 11.5% | 40.6% |
| LMArena Expert | 1439 | 1458 |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |

## Multimodal

- Claude Opus 4.1: 26.2 (#114)
- Muse Spark: 42.7 (#23)

| Benchmark | Claude Opus 4.1 | Muse Spark |
|---|---|---|
| LMArena Vision | — | 1306 |
| VPCT | 35% | — |
| LMArena Document | — | 1444 |

## Multilingual

- Claude Opus 4.1: 52.1 (#90)
- Muse Spark: 56.3 (#23)

| Benchmark | Claude Opus 4.1 | Muse Spark |
|---|---|---|
| LMArena Non-English | 1405 | 1464 |
| LMArena Chinese | 1427 | 1507 |
| LMArena French | 1432 | 1497 |
| LMArena German | 1412 | 1497 |
| LMArena Korean | 1381 | 1457 |
| LMArena Russian | 1421 | 1467 |
| LMArena Spanish | 1448 | 1471 |
| LMArena Japanese | 1378 | — |

## Instruction Following

- Claude Opus 4.1: 75.8 (#53)
- Muse Spark: 76.1 (#47)

| Benchmark | Claude Opus 4.1 | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1436 | 1443 |

## Long Context

- Claude Opus 4.1: 44.5 (#60)
- Muse Spark: 44.4 (#65)

| Benchmark | Claude Opus 4.1 | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1455 | 1451 |

## Writing & Preference

- Claude Opus 4.1: 62.6 (#70)
- Muse Spark: 66.2 (#37)

| Benchmark | Claude Opus 4.1 | Muse Spark |
|---|---|---|
| LMArena Text | 1419 | 1474 |
| LMArena Creative Writing | 1412 | 1460 |
| LMArena Multi-Turn | 1444 | 1477 |
| Short-Story Creative Writing | 84.7% | — |

## FAQ

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

Muse Spark is the stronger model overall, scoring 50.3 to 40.8 on the Noometry Index.

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

Muse Spark scores higher on coding benchmarks: 45.6 versus 44.3 in the Noometry coding category.

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

22 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Muse Spark has 27.