# Muse Spark 1.2 vs Step 3

> Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 40.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/muse-spark-1-2-vs-step-3
- Last updated: 2026-10-11
- Shared benchmarks: 14

## Summary

- They share 14 benchmarks with published results for both. Muse Spark 1.2 scores higher in 9 categories and Step 3 in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 51.3 to 28.4.
- Step 3 has downloadable open weights; the other is API-only.

## Snapshot

| | Muse Spark 1.2 | Step 3 |
|---|---|---|
| Provider | Meta | StepFun |
| Noometry Index | 50.3 | 40.5 |
| Rank | 48 | 149 |
| Context | 1.05M | — |
| Input $/M | $1.25 | — |
| Output $/M | $4.25 | — |
| Weights | Proprietary | Open |

## Coding

- Muse Spark 1.2: 49.2 (#51)
- Step 3: 40.1 (#147)

| Benchmark | Muse Spark 1.2 | Step 3 |
|---|---|---|
| LMArena Coding | 1495 | 1367 |
| DeepSWE | 54.9% | — |
| LMArena WebDev | 1533 | — |
| FrontierSWE | 12% | — |
| SciCode | 56.4% | — |
| WeirdML | 60.3% | — |

## Agentic & Tool Use

- Muse Spark 1.2: 29.4 (#87)
- Step 3: —

| Benchmark | Muse Spark 1.2 | Step 3 |
|---|---|---|
| APEX-Agents | 36.4% | — |
| GDP.pdf | 16% | — |

## Reasoning

- Muse Spark 1.2: 51.3 (#34)
- Step 3: 28.4 (#105)

| Benchmark | Muse Spark 1.2 | Step 3 |
|---|---|---|
| LMArena Hard Prompts | 1486 | 1355 |
| SimpleBench | 74.5% | — |
| Kagi LLM Benchmark | — | 62.3% |
| NYT Connections (extended) | 79.2% | — |
| CritPt | 17.7% | — |
| DTBench | 94.7% | — |
| LMCA | 48.4% | — |
| Epoch Capabilities Index | 154.87 | — |

## Math

- Muse Spark 1.2: 46.4 (#70)
- Step 3: 37.6 (#148)

| Benchmark | Muse Spark 1.2 | Step 3 |
|---|---|---|
| LMArena Math | 1471 | 1366 |
| ProofBench | 43% | — |

## Knowledge

- Muse Spark 1.2: 54.1 (#53)
- Step 3: 36.8 (#164)

| Benchmark | Muse Spark 1.2 | Step 3 |
|---|---|---|
| LMArena Expert | 1480 | 1333 |
| SimpleQA Verified | 60.3% | — |

## Multimodal

- Muse Spark 1.2: 43.4 (#25)
- Step 3: 35.5 (#86)

| Benchmark | Muse Spark 1.2 | Step 3 |
|---|---|---|
| LMArena Vision | 1305 | 1177 |

## Multilingual

- Muse Spark 1.2: 57.1 (#11)
- Step 3: 46.3 (#159)

| Benchmark | Muse Spark 1.2 | Step 3 |
|---|---|---|
| LMArena Non-English | 1478 | 1327 |
| LMArena Chinese | 1511 | 1397 |
| LMArena Russian | 1487 | 1331 |
| LMArena Spanish | 1498 | 1371 |
| LMArena French | 1513 | — |
| LMArena German | — | 1371 |
| LMArena Korean | — | 1269 |

## Instruction Following

- Muse Spark 1.2: 76.7 (#36)
- Step 3: 70.4 (#164)

| Benchmark | Muse Spark 1.2 | Step 3 |
|---|---|---|
| LMArena Instruction Following | 1461 | 1332 |

## Long Context

- Muse Spark 1.2: 45.2 (#48)
- Step 3: 40.3 (#157)

| Benchmark | Muse Spark 1.2 | Step 3 |
|---|---|---|
| LMArena Longer Query | 1475 | 1326 |

## Writing & Preference

- Muse Spark 1.2: 72.3 (#14)
- Step 3: 54.3 (#151)

| Benchmark | Muse Spark 1.2 | Step 3 |
|---|---|---|
| LMArena Text | 1482 | 1350 |
| LMArena Creative Writing | 1449 | 1321 |
| LMArena Multi-Turn | 1494 | 1341 |
| EQ-Bench Creative Writing | 1840 | — |

## FAQ

### Is Muse Spark 1.2 better than Step 3?

Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 40.5 on the Noometry Index.

### Is Muse Spark 1.2 or Step 3 better for coding?

Muse Spark 1.2 scores higher on coding benchmarks: 49.2 versus 40.1 in the Noometry coding category.

### How many benchmarks do Muse Spark 1.2 and Step 3 share?

14 benchmarks have published results for both models. Muse Spark 1.2 has 31 scored results on Noometry and Step 3 has 17.