# Claude Opus 4 vs Muse Spark

> Muse Spark is the stronger model overall, scoring 50.6 to 43.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-vs-muse-spark
- Last updated: 2026-10-10
- Shared benchmarks: 24

## Summary

- They share 24 benchmarks with published results for both. Claude Opus 4 scores higher in 2 categories and Muse Spark in 7 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Muse Spark leads 65.7 to 44.0.
- The biggest single-benchmark swing is Humanity's Last Exam: 10.7% for Claude Opus 4 and 40.6% for Muse Spark.

## Snapshot

| | Claude Opus 4 | Muse Spark |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 43.1 | 50.6 |
| Rank | 100 | 46 |
| Context | 200K | — |
| Input $/M | $15 | — |
| Output $/M | $75 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4: 47.2 (#62)
- Muse Spark: 46.2 (#69)

| Benchmark | Claude Opus 4 | Muse Spark |
|---|---|---|
| LMArena Coding | 1442 | 1481 |
| SWE-bench Verified | 70.7% | — |
| SWE-bench Verified (bash only) | 67.6% | — |
| Aider Polyglot | 72% | — |
| SciCode | — | 51.5% |
| GSO | 6.9% | — |
| WeirdML | 43.7% | — |
| AlgoTune | 1.33 | — |

## Agentic & Tool Use

- Claude Opus 4: 34.8 (#42)
- Muse Spark: —

| Benchmark | Claude Opus 4 | Muse Spark |
|---|---|---|
| Cybench | 38% | — |
| DeepResearch Bench | 46.8% | — |
| LMArena Search | 1127 | — |
| METR Time Horizons | 63.9% | — |

## Reasoning

- Claude Opus 4: 27.3 (#121)
- Muse Spark: 35.9 (#67)

| Benchmark | Claude Opus 4 | Muse Spark |
|---|---|---|
| CritPt | 0.3% | 11.3% |
| LMArena Hard Prompts | 1399 | 1474 |
| Epoch Capabilities Index | 142.67 | 152.04 |
| ARC-AGI-2 | 8.6% | — |
| SimpleBench | 58.8% | — |
| Kagi LLM Benchmark | 74.3% | — |
| ARC-AGI-1 | 35.7% | — |
| EnigmaEval | 5.6% | — |
| DTBench | 81.6% | — |
| LMCA | 37.4% | — |
| ForecastBench | 61.1 | — |

## Math

- Claude Opus 4: 42.0 (#86)
- Muse Spark: 47.8 (#66)

| Benchmark | Claude Opus 4 | Muse Spark |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 64.4% | 88.9% |
| LMArena Math | 1390 | 1455 |
| FrontierMath (Feb 2025 set) | 4.5% | 39% |
| FrontierMath Tier 4 (v1) | 4.2% | 14.6% |
| ProofBench | — | 17% |
| Omni-MATH | 61.6% | — |
| MATH Level 5 | 85% | — |

## Knowledge

- Claude Opus 4: 44.0 (#88)
- Muse Spark: 65.7 (#13)

| Benchmark | Claude Opus 4 | Muse Spark |
|---|---|---|
| GPQA Diamond | 76.3% | 89.8% |
| Humanity's Last Exam | 10.7% | 40.6% |
| LMArena Expert | 1386 | 1457 |
| MMLU-Pro | 87.5% | — |
| Confabulations | 15.9% | — |
| Vectara Hallucination Rate | 12% | — |
| GPQA (HELM) | 70.8% | — |

## Multimodal

- Claude Opus 4: 31.5 (#106)
- Muse Spark: 43.4 (#24)

| Benchmark | Claude Opus 4 | Muse Spark |
|---|---|---|
| LMArena Vision | 1192 | 1306 |
| GeoBench | 49% | — |
| VPCT | 38% | — |
| LMArena Document | — | 1444 |

## Multilingual

- Claude Opus 4: 48.8 (#138)
- Muse Spark: 56.1 (#24)

| Benchmark | Claude Opus 4 | Muse Spark |
|---|---|---|
| LMArena Non-English | 1362 | 1464 |
| LMArena Chinese | 1386 | 1509 |
| LMArena French | 1372 | 1497 |
| LMArena German | 1391 | 1497 |
| LMArena Korean | 1321 | 1459 |
| LMArena Russian | 1392 | 1466 |
| LMArena Spanish | 1389 | 1472 |
| LMArena Japanese | 1331 | — |

## Instruction Following

- Claude Opus 4: 77.1 (#28)
- Muse Spark: 75.9 (#51)

| Benchmark | Claude Opus 4 | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1406 | 1442 |
| IFEval | 91.8% | — |

## Long Context

- Claude Opus 4: 39.6 (#172)
- Muse Spark: 44.4 (#69)

| Benchmark | Claude Opus 4 | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1422 | 1451 |
| Fiction.LiveBench | 61.1% | — |

## Writing & Preference

- Claude Opus 4: 61.2 (#89)
- Muse Spark: 66.0 (#39)

| Benchmark | Claude Opus 4 | Muse Spark |
|---|---|---|
| LMArena Text | 1377 | 1474 |
| LMArena Creative Writing | 1387 | 1459 |
| LMArena Multi-Turn | 1396 | 1477 |
| Short-Story Creative Writing | 83.6% | — |
| EQ-Bench Creative Writing | 1580 | — |
| WildBench | 85.2% | — |

## FAQ

### Is Claude Opus 4 better than Muse Spark?

Muse Spark is the stronger model overall, scoring 50.6 to 43.1 on the Noometry Index.

### Is Claude Opus 4 or Muse Spark better for coding?

Claude Opus 4 scores higher on coding benchmarks: 47.2 versus 46.2 in the Noometry coding category.

### How many benchmarks do Claude Opus 4 and Muse Spark share?

24 benchmarks have published results for both models. Claude Opus 4 has 56 scored results on Noometry and Muse Spark has 27.