# Claude Sonnet 5.5 vs Muse Spark

> Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 50.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-5-vs-muse-spark
- Last updated: 2026-10-10
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 7 categories and Muse Spark in 2 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 47.8.
- The biggest single-benchmark swing is ProofBench: 100% for Claude Sonnet 5.5 and 17% for Muse Spark.

## Snapshot

| | Claude Sonnet 5.5 | Muse Spark |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 61.9 | 50.6 |
| Rank | 10 | 46 |
| Context | 1M | — |
| Input $/M | $2 | — |
| Output $/M | $10 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Sonnet 5.5: 67.3 (#6)
- Muse Spark: 46.2 (#69)

| Benchmark | Claude Sonnet 5.5 | Muse Spark |
|---|---|---|
| SciCode | 61% | 51.5% |
| LMArena Coding | 1513 | 1481 |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1774 | — |
| FrontierSWE | 61.9% | — |
| ALE-Bench | 1,819 | — |

## Agentic & Tool Use

- Claude Sonnet 5.5: 45.0 (#16)
- Muse Spark: —

| Benchmark | Claude Sonnet 5.5 | Muse Spark |
|---|---|---|
| APEX-Agents | 75.5% | — |

## Reasoning

- Claude Sonnet 5.5: 54.0 (#28)
- Muse Spark: 35.9 (#67)

| Benchmark | Claude Sonnet 5.5 | Muse Spark |
|---|---|---|
| CritPt | 31.4% | 11.3% |
| LMArena Hard Prompts | 1495 | 1474 |
| Epoch Capabilities Index | 165.03 | 152.04 |
| NYT Connections (extended) | 80.5% | — |
| Mystery Game Puzzles | 65% | — |

## Math

- Claude Sonnet 5.5: 87.9 (#6)
- Muse Spark: 47.8 (#66)

| Benchmark | Claude Sonnet 5.5 | Muse Spark |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 88.9% |
| ProofBench | 100% | 17% |
| LMArena Math | 1510 | 1455 |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| FrontierMath (Feb 2025 set) | — | 39% |
| FrontierMath Erdős | 2.9% | — |
| FrontierMath Tier 4 (v1) | — | 14.6% |

## Knowledge

- Claude Sonnet 5.5: 66.0 (#12)
- Muse Spark: 65.7 (#13)

| Benchmark | Claude Sonnet 5.5 | Muse Spark |
|---|---|---|
| GPQA Diamond | 95.6% | 89.8% |
| LMArena Expert | 1540 | 1457 |
| Humanity's Last Exam | — | 40.6% |
| SimpleQA Verified | 46.5% | — |

## Multimodal

- Claude Sonnet 5.5: 51.5 (#6)
- Muse Spark: 43.4 (#24)

| Benchmark | Claude Sonnet 5.5 | Muse Spark |
|---|---|---|
| LMArena Vision | 1289 | 1306 |
| Furniture Assembly | 75% | — |
| LMArena Document | — | 1444 |

## Multilingual

- Claude Sonnet 5.5: 55.3 (#30)
- Muse Spark: 56.1 (#24)

| Benchmark | Claude Sonnet 5.5 | Muse Spark |
|---|---|---|
| LMArena Non-English | 1452 | 1464 |
| LMArena Chinese | 1522 | 1509 |
| LMArena Russian | 1451 | 1466 |
| LMArena French | — | 1497 |
| LMArena German | — | 1497 |
| LMArena Korean | — | 1459 |
| LMArena Spanish | — | 1472 |

## Instruction Following

- Claude Sonnet 5.5: 78.3 (#11)
- Muse Spark: 75.9 (#51)

| Benchmark | Claude Sonnet 5.5 | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1495 | 1442 |

## Long Context

- Claude Sonnet 5.5: 45.9 (#28)
- Muse Spark: 44.4 (#69)

| Benchmark | Claude Sonnet 5.5 | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1498 | 1451 |

## Writing & Preference

- Claude Sonnet 5.5: 66.0 (#40)
- Muse Spark: 66.0 (#39)

| Benchmark | Claude Sonnet 5.5 | Muse Spark |
|---|---|---|
| LMArena Text | 1471 | 1474 |
| LMArena Creative Writing | 1465 | 1459 |
| LMArena Multi-Turn | 1474 | 1477 |

## FAQ

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

Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 50.6 on the Noometry Index.

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

Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 46.2 in the Noometry coding category.

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

19 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Muse Spark has 27.