# Claude Opus 5.5 vs Muse Spark

> Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 50.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-5-5-vs-muse-spark
- Last updated: 2026-10-10
- Shared benchmarks: 16

## Summary

- They share 16 benchmarks with published results for both. Claude Opus 5.5 scores higher in 9 categories and Muse Spark in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Opus 5.5 leads 92.4 to 46.8.
- The biggest single-benchmark swing is ProofBench: 100% for Claude Opus 5.5 and 17% for Muse Spark.

## Snapshot

| | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 68.5 | 50.3 |
| Rank | 3 | 41 |
| Context | 1M | — |
| Input $/M | $4 | — |
| Output $/M | $20 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 5.5: 71.4 (#1)
- Muse Spark: 45.6 (#65)

| Benchmark | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| SciCode | 66.9% | 51.5% |
| LMArena Coding | 1545 | 1482 |
| FrontierCode | 54.4% | — |
| CursorBench | 57.8% | — |
| LMArena WebDev | 1820 | — |
| FrontierSWE | 62.3% | — |
| MirrorCode | 77.4% | — |

## Agentic & Tool Use

- Claude Opus 5.5: 45.3 (#13)
- Muse Spark: —

| Benchmark | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| APEX-Agents | 73.5% | — |
| GDP.pdf | 30.6% | — |

## Reasoning

- Claude Opus 5.5: 79.5 (#2)
- Muse Spark: 34.9 (#61)

| Benchmark | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| CritPt | 31.7% | 11.3% |
| LMArena Hard Prompts | 1545 | 1475 |
| ARC-AGI-2 | 92.5% | — |
| NYT Connections (extended) | 88.5% | — |
| ARC-AGI-1 | 97.5% | — |
| EBR-Bench | 71.4% | — |
| Mystery Game Puzzles | 71% | — |
| DTBench | 98.9% | — |
| LMCA | 68.2% | — |
| Epoch Capabilities Index | — | 152.09 |

## Math

- Claude Opus 5.5: 92.4 (#2)
- Muse Spark: 46.8 (#57)

| Benchmark | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 88.9% |
| ProofBench | 100% | 17% |
| FrontierMath (Tiers 1-3) | 91.2% | — |
| FrontierMath Tier 4 | 95% | — |
| LMArena Math | — | 1455 |
| FrontierMath (Feb 2025 set) | — | 39% |
| FrontierMath Tier 4 (v1) | — | 14.6% |

## Knowledge

- Claude Opus 5.5: 66.6 (#9)
- Muse Spark: 65.7 (#12)

| Benchmark | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| GPQA Diamond | 90.6% | 89.8% |
| LMArena Expert | 1564 | 1458 |
| Humanity's Last Exam | — | 40.6% |
| SimpleQA Verified | 72.2% | — |

## Multimodal

- Claude Opus 5.5: 56.5 (#2)
- Muse Spark: 42.7 (#23)

| Benchmark | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| LMArena Vision | — | 1306 |
| Furniture Assembly | 83.3% | — |
| LMArena Document | — | 1444 |

## Multilingual

- Claude Opus 5.5: 59.8 (#1)
- Muse Spark: 56.3 (#23)

| Benchmark | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| LMArena Non-English | 1513 | 1464 |
| LMArena Chinese | 1572 | 1507 |
| LMArena Russian | 1532 | 1467 |
| LMArena French | — | 1497 |
| LMArena German | — | 1497 |
| LMArena Korean | — | 1457 |
| LMArena Spanish | — | 1471 |

## Instruction Following

- Claude Opus 5.5: 80.1 (#2)
- Muse Spark: 76.1 (#47)

| Benchmark | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1535 | 1443 |

## Long Context

- Claude Opus 5.5: 47.3 (#18)
- Muse Spark: 44.4 (#65)

| Benchmark | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1540 | 1451 |

## Writing & Preference

- Claude Opus 5.5: 78.7 (#3)
- Muse Spark: 66.2 (#37)

| Benchmark | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| LMArena Text | 1518 | 1474 |
| LMArena Creative Writing | 1538 | 1460 |
| LMArena Multi-Turn | 1520 | 1477 |
| EQ-Bench Creative Writing | 2050 | — |

## FAQ

### Is Claude Opus 5.5 better than Muse Spark?

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 50.3 on the Noometry Index.

### Is Claude Opus 5.5 or Muse Spark better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.4 versus 45.6 in the Noometry coding category.

### How many benchmarks do Claude Opus 5.5 and Muse Spark share?

16 benchmarks have published results for both models. Claude Opus 5.5 has 35 scored results on Noometry and Muse Spark has 27.