# Muse Spark 1.3 vs Step 3

> Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 40.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/muse-spark-1-3-vs-step-3
- Last updated: 2026-10-10
- Shared benchmarks: 16

## Summary

- They share 16 benchmarks with published results for both. Muse Spark 1.3 scores higher in 9 categories and Step 3 in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Muse Spark 1.3 leads 73.1 to 37.6.
- Step 3 has downloadable open weights; the other is API-only.

## Snapshot

| | Muse Spark 1.3 | Step 3 |
|---|---|---|
| Provider | Meta | StepFun |
| Noometry Index | 54.8 | 40.5 |
| Rank | 27 | 149 |
| Context | 1.05M | — |
| Input $/M | $1.25 | — |
| Output $/M | $4.25 | — |
| Weights | Proprietary | Open |

## Coding

- Muse Spark 1.3: 56.6 (#21)
- Step 3: 40.1 (#147)

| Benchmark | Muse Spark 1.3 | Step 3 |
|---|---|---|
| LMArena Coding | 1514 | 1367 |
| CursorBench | 41.6% | — |
| LMArena WebDev | 1657 | — |
| SciCode | 59.7% | — |

## Agentic & Tool Use

- Muse Spark 1.3: 38.6 (#30)
- Step 3: —

| Benchmark | Muse Spark 1.3 | Step 3 |
|---|---|---|
| APEX-Agents | 57.8% | — |
| GDP.pdf | 27.6% | — |

## Reasoning

- Muse Spark 1.3: 54.0 (#27)
- Step 3: 28.4 (#105)

| Benchmark | Muse Spark 1.3 | Step 3 |
|---|---|---|
| LMArena Hard Prompts | 1503 | 1355 |
| Kagi LLM Benchmark | — | 62.3% |
| NYT Connections (extended) | 85.1% | — |
| CritPt | 26% | — |
| Chess Puzzles | 38% | — |
| Mystery Game Puzzles | 25% | — |
| DTBench | 96.5% | — |
| LMCA | 53.9% | — |
| Bench to the Future 3 | 0.14 | — |
| Epoch Capabilities Index | 156.75 | — |

## Math

- Muse Spark 1.3: 73.1 (#21)
- Step 3: 37.6 (#148)

| Benchmark | Muse Spark 1.3 | Step 3 |
|---|---|---|
| LMArena Math | 1494 | 1366 |
| FrontierMath (Tiers 1-3) | 74.4% | — |
| FrontierMath Tier 4 | 46.3% | — |
| OTIS Mock AIME 2024-2025 | 99.2% | — |
| ProofBench | 58% | — |

## Knowledge

- Muse Spark 1.3: 42.6 (#95)
- Step 3: 36.8 (#164)

| Benchmark | Muse Spark 1.3 | Step 3 |
|---|---|---|
| LMArena Expert | 1516 | 1333 |

## Multimodal

- Muse Spark 1.3: 43.7 (#22)
- Step 3: 35.5 (#86)

| Benchmark | Muse Spark 1.3 | Step 3 |
|---|---|---|
| LMArena Vision | 1309 | 1177 |
| LMArena Document | 1471 | — |

## Multilingual

- Muse Spark 1.3: 57.4 (#8)
- Step 3: 46.3 (#159)

| Benchmark | Muse Spark 1.3 | Step 3 |
|---|---|---|
| LMArena Non-English | 1481 | 1327 |
| LMArena Chinese | 1529 | 1397 |
| LMArena German | 1515 | 1371 |
| LMArena Korean | 1501 | 1269 |
| LMArena Russian | 1490 | 1331 |
| LMArena Spanish | 1490 | 1371 |
| LMArena French | 1524 | — |
| LMArena Japanese | 1474 | — |

## Instruction Following

- Muse Spark 1.3: 77.5 (#22)
- Step 3: 70.4 (#164)

| Benchmark | Muse Spark 1.3 | Step 3 |
|---|---|---|
| LMArena Instruction Following | 1477 | 1332 |

## Long Context

- Muse Spark 1.3: 45.6 (#32)
- Step 3: 40.3 (#157)

| Benchmark | Muse Spark 1.3 | Step 3 |
|---|---|---|
| LMArena Longer Query | 1488 | 1326 |

## Writing & Preference

- Muse Spark 1.3: 73.6 (#9)
- Step 3: 54.3 (#151)

| Benchmark | Muse Spark 1.3 | Step 3 |
|---|---|---|
| LMArena Text | 1490 | 1350 |
| LMArena Creative Writing | 1455 | 1321 |
| LMArena Multi-Turn | 1482 | 1341 |
| EQ-Bench Creative Writing | 1906 | — |

## FAQ

### Is Muse Spark 1.3 better than Step 3?

Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 40.5 on the Noometry Index.

### Is Muse Spark 1.3 or Step 3 better for coding?

Muse Spark 1.3 scores higher on coding benchmarks: 56.6 versus 40.1 in the Noometry coding category.

### How many benchmarks do Muse Spark 1.3 and Step 3 share?

16 benchmarks have published results for both models. Muse Spark 1.3 has 37 scored results on Noometry and Step 3 has 17.