# Muse Spark 1.3 vs Step 3.7 Flash

> Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 37.3 on the Noometry Index. Step 3.7 Flash costs 4.8× less per token, which makes it the better buy when Muse Spark 1.3's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/muse-spark-1-3-vs-step-3-7-flash
- Last updated: 2026-10-10
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. Muse Spark 1.3 scores higher in 3 categories and Step 3.7 Flash in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.3 leads 54.0 to 21.6.
- The biggest single-benchmark swing is NYT Connections (extended): 85.1% for Muse Spark 1.3 and 39.7% for Step 3.7 Flash.
- Step 3.7 Flash is cheaper at $0.18 / $1.11 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 256K.
- Step 3.7 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | Muse Spark 1.3 | Step 3.7 Flash |
|---|---|---|
| Provider | Meta | StepFun |
| Noometry Index | 54.8 | 37.3 |
| Rank | 27 | 207 |
| Context | 1.05M | 256K |
| Input $/M | $1.25 | $0.18 |
| Output $/M | $4.25 | $1.11 |
| Weights | Proprietary | Open |

## Coding

- Muse Spark 1.3: 56.6 (#21)
- Step 3.7 Flash: 40.0 (#150)

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash |
|---|---|---|
| SciCode | 59.7% | 40% |
| CursorBench | 41.6% | — |
| LMArena WebDev | 1657 | — |
| LMArena Coding | 1514 | — |
| ALE-Bench | — | 694.12 |

## Agentic & Tool Use

- Muse Spark 1.3: 38.6 (#30)
- Step 3.7 Flash: —

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash |
|---|---|---|
| APEX-Agents | 57.8% | — |
| GDP.pdf | 27.6% | — |

## Reasoning

- Muse Spark 1.3: 54.0 (#27)
- Step 3.7 Flash: 21.6 (#219)

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash |
|---|---|---|
| NYT Connections (extended) | 85.1% | 39.7% |
| CritPt | 26% | 2.3% |
| 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

- Muse Spark 1.3: 73.1 (#21)
- Step 3.7 Flash: 42.9 (#82)

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74.4% | — |
| FrontierMath Tier 4 | 46.3% | — |
| MathArena Final-Answer Competitions | — | 68.5% |
| OTIS Mock AIME 2024-2025 | 99.2% | — |
| ProofBench | 58% | — |
| LMArena Math | 1494 | — |

## Knowledge

- Muse Spark 1.3: 42.6 (#95)
- Step 3.7 Flash: —

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash |
|---|---|---|
| LMArena Expert | 1516 | — |

## Multimodal

- Muse Spark 1.3: 43.7 (#22)
- Step 3.7 Flash: —

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash |
|---|---|---|
| LMArena Vision | 1309 | — |
| LMArena Document | 1471 | — |

## Multilingual

- Muse Spark 1.3: 57.4 (#8)
- Step 3.7 Flash: —

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash |
|---|---|---|
| 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

- Muse Spark 1.3: 77.5 (#22)
- Step 3.7 Flash: —

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash |
|---|---|---|
| LMArena Instruction Following | 1477 | — |

## Long Context

- Muse Spark 1.3: 45.6 (#32)
- Step 3.7 Flash: —

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1488 | — |

## Writing & Preference

- Muse Spark 1.3: 73.6 (#9)
- Step 3.7 Flash: —

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1490 | — |
| LMArena Creative Writing | 1455 | — |
| EQ-Bench Creative Writing | 1906 | — |
| LMArena Multi-Turn | 1482 | — |

## FAQ

### Is Muse Spark 1.3 better than Step 3.7 Flash?

Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 37.3 on the Noometry Index. Step 3.7 Flash costs 4.8× less per token, which makes it the better buy when Muse Spark 1.3's lead doesn't matter for your workload.

### Which is cheaper, Muse Spark 1.3 or Step 3.7 Flash?

Step 3.7 Flash is cheaper. It lists at $0.18 per million input tokens and $1.11 per million output tokens; Muse Spark 1.3 lists at $1.25 and $4.25.

### Is Muse Spark 1.3 or Step 3.7 Flash better for coding?

Muse Spark 1.3 scores higher on coding benchmarks: 56.6 versus 40.0 in the Noometry coding category.

### Which has the bigger context window?

Muse Spark 1.3 does, with 1.05M tokens against 256K.

### How many benchmarks do Muse Spark 1.3 and Step 3.7 Flash share?

3 benchmarks have published results for both models. Muse Spark 1.3 has 37 scored results on Noometry and Step 3.7 Flash has 5.