Model comparison
Muse Spark 1.3 vs Solar Pro 3
Muse Spark 1.3 has enough public results to be ranked (#27); Solar Pro 3 does not yet, so treat this comparison as directional.
Last verified . 2 shared benchmarks.
Meta
UpstageSummary
- They share 2 benchmarks with published results for both. Muse Spark 1.3 scores higher in 2 categories and Solar Pro 3 in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.3 leads 54.0 to 22.4.
- The biggest single-benchmark swing is SciCode: 59.7% for Muse Spark 1.3 and 24.7% for Solar Pro 3.
- Solar Pro 3 is cheaper at $0.25 / $0.25 per million input/output tokens, against $1.25 / $4.25 for Muse Spark 1.3.
- Muse Spark 1.3 accepts more context: 1.05M tokens versus 131K.
Side by side
| Muse Spark 1.3 | Solar Pro 3 | |
|---|---|---|
| Provider | Meta | Upstage |
| Noometry Index | 54.8 | 33.9 |
| Released | 2026-09-02 | 2026-01 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 131K |
| Max output | 131K | 8K |
| Input $ / M tokens | $1.25 | $0.25 |
| Output $ / M tokens | $4.25 | $0.25 |
| Results tracked | 37 | 2 |
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Category by category
Coding Muse Spark 1.3 leads
Muse Spark 1.3: 56.6 (#21), Solar Pro 3: 34.8
| Benchmark | Muse Spark 1.3 | Solar Pro 3 |
|---|---|---|
| SciCode | 59.7% | 24.7% |
| CursorBench | 41.6% | — |
| LMArena WebDev | 1657 | — |
| LMArena Coding | 1514 | — |
Agentic & Tool Use Not comparable
Muse Spark 1.3: 38.6 (#30), Solar Pro 3: —
| Benchmark | Muse Spark 1.3 | Solar Pro 3 |
|---|---|---|
| APEX-Agents | 57.8% | — |
| GDP.pdf | 27.6% | — |
Reasoning Muse Spark 1.3 leads
Muse Spark 1.3: 54.0 (#27), Solar Pro 3: 22.4
| Benchmark | Muse Spark 1.3 | Solar Pro 3 |
|---|---|---|
| CritPt | 26% | 0% |
| NYT Connections (extended) | 85.1% | — |
| Chess Puzzles | 38% | — |
| LMArena Hard Prompts | 1503 | — |
| Mystery Game Puzzles | 25% | — |
| DTBench | 96.5% | — |
| LMCA | 53.9% | — |
| Bench to the Future 3 | 0.14 | — |
| Epoch Capabilities Index | 156.75 | — |
Math Not comparable
Muse Spark 1.3: 73.1 (#21), Solar Pro 3: —
| Benchmark | Muse Spark 1.3 | Solar Pro 3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74.4% | — |
| FrontierMath Tier 4 | 46.3% | — |
| OTIS Mock AIME 2024-2025 | 99.2% | — |
| ProofBench | 58% | — |
| LMArena Math | 1494 | — |
Knowledge Not comparable
Muse Spark 1.3: 42.6 (#95), Solar Pro 3: —
| Benchmark | Muse Spark 1.3 | Solar Pro 3 |
|---|---|---|
| LMArena Expert | 1516 | — |
Multimodal Not comparable
Muse Spark 1.3: 43.7 (#22), Solar Pro 3: —
| Benchmark | Muse Spark 1.3 | Solar Pro 3 |
|---|---|---|
| LMArena Vision | 1309 | — |
| LMArena Document | 1471 | — |
Multilingual Not comparable
Muse Spark 1.3: 57.4 (#8), Solar Pro 3: —
| Benchmark | Muse Spark 1.3 | Solar Pro 3 |
|---|---|---|
| LMArena Non-English | 1481 | — |
| LMArena Chinese | 1529 | — |
| LMArena French | 1524 | — |
| LMArena German | 1515 | — |
| LMArena Japanese | 1474 | — |
| LMArena Korean | 1501 | — |
| LMArena Russian | 1490 | — |
| LMArena Spanish | 1490 | — |
Instruction Following Not comparable
Muse Spark 1.3: 77.5 (#22), Solar Pro 3: —
| Benchmark | Muse Spark 1.3 | Solar Pro 3 |
|---|---|---|
| LMArena Instruction Following | 1477 | — |
Long Context Not comparable
Muse Spark 1.3: 45.6 (#32), Solar Pro 3: —
| Benchmark | Muse Spark 1.3 | Solar Pro 3 |
|---|---|---|
| LMArena Longer Query | 1488 | — |
Writing & Preference Not comparable
Muse Spark 1.3: 73.6 (#9), Solar Pro 3: —
| Benchmark | Muse Spark 1.3 | Solar Pro 3 |
|---|---|---|
| LMArena Text | 1490 | — |
| LMArena Creative Writing | 1455 | — |
| EQ-Bench Creative Writing | 1906 | — |
| LMArena Multi-Turn | 1482 | — |
Frequently asked questions
Is Muse Spark 1.3 better than Solar Pro 3?
Muse Spark 1.3 has enough public results to be ranked (#27); Solar Pro 3 does not yet, so treat this comparison as directional.
Which is cheaper, Muse Spark 1.3 or Solar Pro 3?
Solar Pro 3 is cheaper. It lists at $0.25 per million input tokens and $0.25 per million output tokens; Muse Spark 1.3 lists at $1.25 and $4.25.
Is Muse Spark 1.3 or Solar Pro 3 better for coding?
Muse Spark 1.3 scores higher on coding benchmarks: 56.6 versus 34.8 in the Noometry coding category.
Which has the bigger context window?
Muse Spark 1.3 does, with 1.05M tokens against 131K.
How many benchmarks do Muse Spark 1.3 and Solar Pro 3 share?
2 benchmarks have published results for both models. Muse Spark 1.3 has 37 scored results on Noometry and Solar Pro 3 has 2.