Model comparison
Muse Spark vs Solar Pro4
Muse Spark is the stronger model overall, scoring 50.3 to 41.5 on the Noometry Index.
Last verified . 16 shared benchmarks.
Meta
UpstageSummary
- 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 39.0.
Side by side
| Muse Spark | Solar Pro4 | |
|---|---|---|
| Provider | Meta | Upstage |
| Noometry Index | 50.3 | 41.5 |
| Released | 2026-04-08 | 2026-08-06 |
| Weights | Proprietary | Proprietary |
| Context window | — | 524K |
| Max output | — | 131K |
| Input $ / M tokens | — | $0.30 |
| Output $ / M tokens | — | $1.20 |
| Results tracked | 27 | 18 |
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Category by category
Coding Muse Spark leads
Muse Spark: 45.6 (#65), Solar Pro4: 39.9 (#135)
| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Coding | 1482 | 1439 |
| LMArena WebDev | — | 1371 |
| SciCode | 51.5% | — |
Reasoning Muse Spark leads
Muse Spark: 34.9 (#61), Solar Pro4: 27.3 (#107)
| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1475 | 1398 |
| CritPt | 11.3% | — |
| Epoch Capabilities Index | 152.09 | — |
Math Muse Spark leads
Muse Spark: 46.8 (#57), Solar Pro4: 36.1 (#129)
| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Math | 1455 | 1418 |
| OTIS Mock AIME 2024-2025 | 88.9% | — |
| ProofBench | 17% | — |
| FrontierMath (Feb 2025 set) | 39% | — |
| FrontierMath Tier 4 (v1) | 14.6% | — |
Knowledge Muse Spark leads
Muse Spark: 65.7 (#12), Solar Pro4: 39.0 (#128)
| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1458 | 1421 |
| GPQA Diamond | 89.8% | — |
| Humanity's Last Exam | 40.6% | — |
Multimodal Not comparable
Muse Spark: 42.7 (#23), Solar Pro4: —
| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1306 | — |
| LMArena Document | 1444 | — |
Multilingual Muse Spark leads
Muse Spark: 56.3 (#23), Solar Pro4: 49.0 (#134)
| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1464 | 1362 |
| LMArena Chinese | 1507 | 1417 |
| LMArena French | 1497 | 1403 |
| LMArena German | 1497 | 1351 |
| LMArena Korean | 1457 | 1383 |
| LMArena Russian | 1467 | 1360 |
| LMArena Spanish | 1471 | 1408 |
| LMArena Japanese | — | 1300 |
Instruction Following Muse Spark leads
Muse Spark: 76.1 (#47), Solar Pro4: 72.8 (#128)
| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1443 | 1376 |
Long Context Muse Spark leads
Muse Spark: 44.4 (#65), Solar Pro4: 42.0 (#125)
| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1451 | 1379 |
Writing & Preference Muse Spark leads
Muse Spark: 66.2 (#37), Solar Pro4: 56.7 (#133)
| Benchmark | Muse Spark | Solar Pro4 |
|---|---|---|
| LMArena Text | 1474 | 1386 |
| LMArena Creative Writing | 1460 | 1313 |
| LMArena Multi-Turn | 1477 | 1391 |
Frequently asked questions
Is Muse Spark better than Solar Pro4?
Muse Spark is the stronger model overall, scoring 50.3 to 41.5 on the Noometry Index.
Is Muse Spark or Solar Pro4 better for coding?
Muse Spark scores higher on coding benchmarks: 45.6 versus 39.9 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.