# Muse Spark vs Solar Pro4

> Muse Spark is the stronger model overall, scoring 50.6 to 42.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/muse-spark-vs-solar-pro4
- Last updated: 2026-10-12
- Shared benchmarks: 16

## Summary

- They share 16 benchmarks with published results for both. Muse Spark scores higher in 8 categories and Solar Pro4 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Muse Spark leads 65.7 to 39.8.

## Snapshot

| | Muse Spark | Solar Pro4 |
|---|---|---|
| Provider | Meta | Upstage |
| Noometry Index | 50.6 | 42.1 |
| Rank | 46 | 121 |
| Context | — | 524K |
| Input $/M | — | $0.30 |
| Output $/M | — | $1.20 |
| Weights | Proprietary | Proprietary |

## Coding

- Muse Spark: 46.2 (#69)
- Solar Pro4: 40.1 (#149)

| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Coding | 1481 | 1437 |
| LMArena WebDev | — | 1371 |
| SciCode | 51.5% | — |

## Reasoning

- Muse Spark: 35.9 (#67)
- Solar Pro4: 28.5 (#104)

| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1474 | 1399 |
| CritPt | 11.3% | — |
| Epoch Capabilities Index | 152.04 | — |

## Math

- Muse Spark: 47.8 (#66)
- Solar Pro4: 38.8 (#128)

| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Math | 1455 | 1416 |
| OTIS Mock AIME 2024-2025 | 88.9% | — |
| ProofBench | 17% | — |
| FrontierMath (Feb 2025 set) | 39% | — |
| FrontierMath Tier 4 (v1) | 14.6% | — |

## Knowledge

- Muse Spark: 65.7 (#13)
- Solar Pro4: 39.8 (#129)

| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1457 | 1427 |
| GPQA Diamond | 89.8% | — |
| Humanity's Last Exam | 40.6% | — |

## Multimodal

- Muse Spark: 43.4 (#24)
- Solar Pro4: —

| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1306 | — |
| LMArena Document | 1444 | — |

## Multilingual

- Muse Spark: 56.1 (#24)
- Solar Pro4: 48.7 (#139)

| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1464 | 1361 |
| LMArena Chinese | 1509 | 1415 |
| LMArena French | 1497 | 1397 |
| LMArena German | 1497 | 1364 |
| LMArena Korean | 1459 | 1382 |
| LMArena Russian | 1466 | 1360 |
| LMArena Spanish | 1472 | 1401 |
| LMArena Japanese | — | 1309 |

## Instruction Following

- Muse Spark: 75.9 (#51)
- Solar Pro4: 72.7 (#132)

| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1442 | 1377 |

## Long Context

- Muse Spark: 44.4 (#69)
- Solar Pro4: 42.1 (#130)

| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1451 | 1381 |

## Writing & Preference

- Muse Spark: 66.0 (#39)
- Solar Pro4: 56.5 (#138)

| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Text | 1474 | 1386 |
| LMArena Creative Writing | 1459 | 1316 |
| LMArena Multi-Turn | 1477 | 1385 |

## FAQ

### Is Muse Spark better than Solar Pro4?

Muse Spark is the stronger model overall, scoring 50.6 to 42.1 on the Noometry Index.

### Is Muse Spark or Solar Pro4 better for coding?

Muse Spark scores higher on coding benchmarks: 46.2 versus 40.1 in the Noometry coding category.

### How many benchmarks do Muse Spark and Solar Pro4 share?

16 benchmarks have published results for both models. Muse Spark has 27 scored results on Noometry and Solar Pro4 has 18.