# Claude Sonnet 5 vs Muse Spark 1.3

> Claude Sonnet 5 and Muse Spark 1.3 score almost the same on the Noometry Index (54.5 vs 54.4), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-vs-muse-spark-1-3
- Last updated: 2026-10-10
- Shared benchmarks: 33

## Summary

- They share 33 benchmarks with published results for both. Claude Sonnet 5 scores higher in 2 categories and Muse Spark 1.3 in 8 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Sonnet 5 leads 55.7 to 42.0.
- The biggest single-benchmark swing is FrontierMath Tier 4: 29.3% for Claude Sonnet 5 and 46.3% for Muse Spark 1.3.
- Muse Spark 1.3 is cheaper at $1.25 / $4.25 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.
- Muse Spark 1.3 accepts more context: 1.05M tokens versus 1M.

## Snapshot

| | Claude Sonnet 5 | Muse Spark 1.3 |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 54.5 | 54.4 |
| Rank | 26 | 27 |
| Context | 1M | 1.05M |
| Input $/M | $2 | $1.25 |
| Output $/M | $10 | $4.25 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Sonnet 5: 55.5 (#20)
- Muse Spark 1.3: 56.1 (#18)

| Benchmark | Claude Sonnet 5 | Muse Spark 1.3 |
|---|---|---|
| CursorBench | 34.1% | 41.6% |
| LMArena WebDev | 1540 | 1655 |
| SciCode | 53.6% | 59.7% |
| LMArena Coding | 1483 | 1516 |
| DeepSWE | 53.8% | — |
| FrontierCode | 42.7% | — |
| GSO | 37.3% | — |
| WeirdML | 68.8% | — |
| ALE-Bench | 1,463 | — |

## Agentic & Tool Use

- Claude Sonnet 5: 42.7 (#16)
- Muse Spark 1.3: 38.6 (#28)

| Benchmark | Claude Sonnet 5 | Muse Spark 1.3 |
|---|---|---|
| APEX-Agents | 54.5% | 57.8% |
| GBAEval | 65.3% | — |
| GDP.pdf | — | 27.6% |
| LMArena Search | 1194 | — |
| Vending-Bench 2 | 6,378 | — |

## Reasoning

- Claude Sonnet 5: 48.2 (#37)
- Muse Spark 1.3: 52.9 (#27)

| Benchmark | Claude Sonnet 5 | Muse Spark 1.3 |
|---|---|---|
| NYT Connections (extended) | 75.1% | 85.1% |
| CritPt | 16.9% | 24.9% |
| Chess Puzzles | 35% | 38% |
| LMArena Hard Prompts | 1461 | 1503 |
| Mystery Game Puzzles | 35% | 25% |
| DTBench | 92.5% | 96.5% |
| LMCA | 50% | 53.9% |
| Bench to the Future 3 | 0.14 | 0.14 |
| Epoch Capabilities Index | 156.34 | 156.89 |
| SimpleBench | 60.6% | — |
| Surface Evolver Bench | 60% | — |
| ForecastBench | 61.1 | — |

## Math

- Claude Sonnet 5: 66.1 (#21)
- Muse Spark 1.3: 72.4 (#16)

| Benchmark | Claude Sonnet 5 | Muse Spark 1.3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 65.6% | 74.4% |
| FrontierMath Tier 4 | 29.3% | 46.3% |
| OTIS Mock AIME 2024-2025 | 94.7% | 99.2% |
| LMArena Math | 1467 | 1497 |
| ProofBench | 77% | — |

## Knowledge

- Claude Sonnet 5: 55.7 (#42)
- Muse Spark 1.3: 42.0 (#92)

| Benchmark | Claude Sonnet 5 | Muse Spark 1.3 |
|---|---|---|
| LMArena Expert | 1491 | 1516 |
| GPQA Diamond | 90.5% | — |
| SimpleQA Verified | 33.7% | — |

## Multimodal

- Claude Sonnet 5: 42.4 (#26)
- Muse Spark 1.3: 43.0 (#21)

| Benchmark | Claude Sonnet 5 | Muse Spark 1.3 |
|---|---|---|
| LMArena Vision | 1275 | 1310 |
| LMArena Document | 1466 | 1471 |
| Blueprint-Bench 2 | 24.9% | — |

## Multilingual

- Claude Sonnet 5: 54.0 (#55)
- Muse Spark 1.3: 57.8 (#6)

| Benchmark | Claude Sonnet 5 | Muse Spark 1.3 |
|---|---|---|
| LMArena Non-English | 1431 | 1485 |
| LMArena Chinese | 1475 | 1527 |
| LMArena French | 1457 | 1534 |
| LMArena Korean | 1411 | 1513 |
| LMArena Russian | 1452 | 1491 |
| LMArena Spanish | 1436 | 1485 |
| LMArena German | 1448 | — |
| LMArena Japanese | 1422 | — |

## Instruction Following

- Claude Sonnet 5: 76.6 (#39)
- Muse Spark 1.3: 77.8 (#14)

| Benchmark | Claude Sonnet 5 | Muse Spark 1.3 |
|---|---|---|
| LMArena Instruction Following | 1453 | 1481 |

## Long Context

- Claude Sonnet 5: 44.8 (#53)
- Muse Spark 1.3: 45.7 (#29)

| Benchmark | Claude Sonnet 5 | Muse Spark 1.3 |
|---|---|---|
| LMArena Longer Query | 1464 | 1491 |

## Writing & Preference

- Claude Sonnet 5: 69.4 (#24)
- Muse Spark 1.3: 73.7 (#10)

| Benchmark | Claude Sonnet 5 | Muse Spark 1.3 |
|---|---|---|
| LMArena Text | 1443 | 1490 |
| LMArena Creative Writing | 1416 | 1450 |
| EQ-Bench Creative Writing | 1794 | 1906 |
| LMArena Multi-Turn | 1454 | 1486 |
| EQ-Bench 4 | 1236 | — |

## FAQ

### Is Claude Sonnet 5 better than Muse Spark 1.3?

Claude Sonnet 5 and Muse Spark 1.3 score almost the same on the Noometry Index (54.5 vs 54.4), so choose on price, context window or the category you care about most.

### Which is cheaper, Claude Sonnet 5 or Muse Spark 1.3?

Muse Spark 1.3 is cheaper. It lists at $1.25 per million input tokens and $4.25 per million output tokens; Claude Sonnet 5 lists at $2 and $10.

### Is Claude Sonnet 5 or Muse Spark 1.3 better for coding?

They score almost the same on coding (55.5 vs 56.1); test both on your own repository before choosing.

### Which has the bigger context window?

Muse Spark 1.3 does, with 1.05M tokens against 1M.

### How many benchmarks do Claude Sonnet 5 and Muse Spark 1.3 share?

33 benchmarks have published results for both models. Claude Sonnet 5 has 51 scored results on Noometry and Muse Spark 1.3 has 34.