# Claude Haiku 5.5 vs Muse Spark

> Muse Spark is the stronger model overall, scoring 50.6 to 49.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-haiku-5-5-vs-muse-spark
- Last updated: 2026-10-12
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. Claude Haiku 5.5 scores higher in 3 categories and Muse Spark in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Haiku 5.5 leads 73.6 to 47.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 98.9% for Claude Haiku 5.5 and 88.9% for Muse Spark.

## Snapshot

| | Claude Haiku 5.5 | Muse Spark |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 49.5 | 50.6 |
| Rank | 52 | 46 |
| Context | 1M | — |
| Input $/M | $0.10 | — |
| Output $/M | $0.50 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Haiku 5.5: 49.2 (#50)
- Muse Spark: 46.2 (#69)

| Benchmark | Claude Haiku 5.5 | Muse Spark |
|---|---|---|
| LMArena WebDev | 1587 | — |
| SciCode | — | 51.5% |
| LMArena Coding | — | 1481 |

## Reasoning

- Claude Haiku 5.5: 35.2 (#69)
- Muse Spark: 35.9 (#67)

| Benchmark | Claude Haiku 5.5 | Muse Spark |
|---|---|---|
| NYT Connections (extended) | 65.7% | — |
| CritPt | — | 11.3% |
| LMArena Hard Prompts | — | 1474 |
| Mystery Game Puzzles | 30% | — |
| Epoch Capabilities Index | — | 152.04 |

## Math

- Claude Haiku 5.5: 73.6 (#18)
- Muse Spark: 47.8 (#66)

| Benchmark | Claude Haiku 5.5 | Muse Spark |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 98.9% | 88.9% |
| FrontierMath (Tiers 1-3) | 75.1% | — |
| FrontierMath Tier 4 | 46.3% | — |
| ProofBench | — | 17% |
| LMArena Math | — | 1455 |
| FrontierMath (Feb 2025 set) | — | 39% |
| FrontierMath Tier 4 (v1) | — | 14.6% |

## Knowledge

- Claude Haiku 5.5: 50.8 (#70)
- Muse Spark: 65.7 (#13)

| Benchmark | Claude Haiku 5.5 | Muse Spark |
|---|---|---|
| GPQA Diamond | 89.6% | 89.8% |
| Humanity's Last Exam | — | 40.6% |
| SimpleQA Verified | 23.8% | — |
| LMArena Expert | — | 1457 |

## Multimodal

- Claude Haiku 5.5: 43.7 (#21)
- Muse Spark: 43.4 (#24)

| Benchmark | Claude Haiku 5.5 | Muse Spark |
|---|---|---|
| LMArena Vision | — | 1306 |
| Furniture Assembly | 47.5% | — |
| LMArena Document | — | 1444 |

## Multilingual

- Claude Haiku 5.5: —
- Muse Spark: 56.1 (#24)

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

## Instruction Following

- Claude Haiku 5.5: —
- Muse Spark: 75.9 (#51)

| Benchmark | Claude Haiku 5.5 | Muse Spark |
|---|---|---|
| LMArena Instruction Following | — | 1442 |

## Long Context

- Claude Haiku 5.5: —
- Muse Spark: 44.4 (#69)

| Benchmark | Claude Haiku 5.5 | Muse Spark |
|---|---|---|
| LMArena Longer Query | — | 1451 |

## Writing & Preference

- Claude Haiku 5.5: —
- Muse Spark: 66.0 (#39)

| Benchmark | Claude Haiku 5.5 | Muse Spark |
|---|---|---|
| LMArena Text | — | 1474 |
| LMArena Creative Writing | — | 1459 |
| LMArena Multi-Turn | — | 1477 |

## FAQ

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

Muse Spark is the stronger model overall, scoring 50.6 to 49.5 on the Noometry Index.

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

Claude Haiku 5.5 scores higher on coding benchmarks: 49.2 versus 46.2 in the Noometry coding category.

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

2 benchmarks have published results for both models. Claude Haiku 5.5 has 9 scored results on Noometry and Muse Spark has 27.