# Claude Fable 5.1 vs Muse Spark

> Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 50.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-fable-5-1-vs-muse-spark
- Last updated: 2026-10-10
- Shared benchmarks: 24

## Summary

- They share 24 benchmarks with published results for both. Claude Fable 5.1 scores higher in 9 categories and Muse Spark in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Fable 5.1 leads 89.6 to 47.8.
- The biggest single-benchmark swing is ProofBench: 100% for Claude Fable 5.1 and 17% for Muse Spark.

## Snapshot

| | Claude Fable 5.1 | Muse Spark |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 69.0 | 50.6 |
| Rank | 2 | 46 |
| Context | 1M | — |
| Input $/M | $10 | — |
| Output $/M | $50 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Fable 5.1: 74.7 (#1)
- Muse Spark: 46.2 (#69)

| Benchmark | Claude Fable 5.1 | Muse Spark |
|---|---|---|
| SciCode | 63.1% | 51.5% |
| LMArena Coding | 1528 | 1481 |
| FrontierCode | 50.9% | — |
| CursorBench | 51.8% | — |
| LMArena WebDev | 1744 | — |
| FrontierSWE | 56.3% | — |
| GSO | 88.2% | — |
| WeirdML | 92.9% | — |
| MirrorCode | 73.3% | — |
| ALE-Bench | 2,143 | — |

## Agentic & Tool Use

- Claude Fable 5.1: 50.7 (#5)
- Muse Spark: —

| Benchmark | Claude Fable 5.1 | Muse Spark |
|---|---|---|
| APEX-Agents | 68.6% | — |
| Remote Labor Index | 17.9% | — |
| GDP.pdf | 29.6% | — |
| Vending-Bench 2 | 5,422 | — |

## Reasoning

- Claude Fable 5.1: 76.7 (#7)
- Muse Spark: 35.9 (#67)

| Benchmark | Claude Fable 5.1 | Muse Spark |
|---|---|---|
| CritPt | 31.1% | 11.3% |
| LMArena Hard Prompts | 1526 | 1474 |
| Epoch Capabilities Index | 164.7 | 152.04 |
| ARC-AGI-2 | 90% | — |
| NYT Connections (extended) | 90% | — |
| ARC-AGI-1 | 97.5% | — |
| Chess Puzzles | 47% | — |
| EBR-Bench | 57.1% | — |
| Mystery Game Puzzles | 58% | — |
| DTBench | 97.6% | — |
| LMCA | 65.5% | — |

## Math

- Claude Fable 5.1: 89.6 (#4)
- Muse Spark: 47.8 (#66)

| Benchmark | Claude Fable 5.1 | Muse Spark |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 88.9% |
| ProofBench | 100% | 17% |
| LMArena Math | 1525 | 1455 |
| FrontierMath (Tiers 1-3) | 90.2% | — |
| FrontierMath Tier 4 | 87.8% | — |
| FrontierMath (Feb 2025 set) | — | 39% |
| FrontierMath Erdős | 0% | — |
| FrontierMath Tier 4 (v1) | — | 14.6% |

## Knowledge

- Claude Fable 5.1: 69.6 (#6)
- Muse Spark: 65.7 (#13)

| Benchmark | Claude Fable 5.1 | Muse Spark |
|---|---|---|
| Humanity's Last Exam | 46.5% | 40.6% |
| LMArena Expert | 1535 | 1457 |
| GPQA Diamond | — | 89.8% |
| SimpleQA Verified | 70.8% | — |

## Multimodal

- Claude Fable 5.1: 53.9 (#4)
- Muse Spark: 43.4 (#24)

| Benchmark | Claude Fable 5.1 | Muse Spark |
|---|---|---|
| LMArena Vision | 1318 | 1306 |
| LMArena Document | 1513 | 1444 |
| Blueprint-Bench 2 | 41.9% | — |
| Furniture Assembly | 70% | — |

## Multilingual

- Claude Fable 5.1: 59.1 (#3)
- Muse Spark: 56.1 (#24)

| Benchmark | Claude Fable 5.1 | Muse Spark |
|---|---|---|
| LMArena Non-English | 1507 | 1464 |
| LMArena Chinese | 1586 | 1509 |
| LMArena French | 1525 | 1497 |
| LMArena German | 1500 | 1497 |
| LMArena Korean | 1534 | 1459 |
| LMArena Russian | 1521 | 1466 |
| LMArena Spanish | 1516 | 1472 |
| LMArena Japanese | 1543 | — |

## Instruction Following

- Claude Fable 5.1: 79.2 (#6)
- Muse Spark: 75.9 (#51)

| Benchmark | Claude Fable 5.1 | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1517 | 1442 |

## Long Context

- Claude Fable 5.1: 46.7 (#20)
- Muse Spark: 44.4 (#69)

| Benchmark | Claude Fable 5.1 | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1522 | 1451 |

## Writing & Preference

- Claude Fable 5.1: 79.2 (#2)
- Muse Spark: 66.0 (#39)

| Benchmark | Claude Fable 5.1 | Muse Spark |
|---|---|---|
| LMArena Text | 1510 | 1474 |
| LMArena Creative Writing | 1507 | 1459 |
| LMArena Multi-Turn | 1492 | 1477 |
| EQ-Bench Creative Writing | 2162 | — |

## FAQ

### Is Claude Fable 5.1 better than Muse Spark?

Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 50.6 on the Noometry Index.

### Is Claude Fable 5.1 or Muse Spark better for coding?

Claude Fable 5.1 scores higher on coding benchmarks: 74.7 versus 46.2 in the Noometry coding category.

### How many benchmarks do Claude Fable 5.1 and Muse Spark share?

24 benchmarks have published results for both models. Claude Fable 5.1 has 52 scored results on Noometry and Muse Spark has 27.