# Muse Spark 1.3 vs Step 3.7 Flash

> Side-by-side benchmark comparison for Muse Spark 1.3 and Step 3.7 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/muse-spark-1-3-vs-step-3-7-flash
- Last updated: October 17, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Muse Spark 1.3 and Step 3.7 Flash share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Step 3.7 Flash has the lower published output-token price.
- Muse Spark 1.3 has the larger published context window at 1M.

## Model Snapshot

| Property | Muse Spark 1.3 | Step 3.7 Flash |
|----------|----------|----------|
| Creator | Meta | StepFun |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 256K |
| Independent public score (not head-to-head) | null | 43.65 |
| Benchmarks Covered | 20 | 11 |
| Pricing (input/output) | $1.25 / $4.25 | $0.20 / $1.15 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: 36.8 (Estimated · #76/128)

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.8% | 59.5% | Muse Spark 1.3 |
| JobBench | 64.9% | Coming soon | Coming soon |
| OSWorld 2.0 | 66.9% | Coming soon | Coming soon |
| DeepSearchQA | 89.4% | 92.8% | Step 3.7 Flash |
| AutomationBench | 49.4% | Coming soon | Coming soon |
| ApprenticeBench | 19% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 72.3% | Coming soon | Coming soon |
| CWE-bench v1 | 55.0% | Coming soon | Coming soon |
| MazeBench | 0% | Coming soon | Coming soon |
| BrowseComp | Coming soon | 75.8% | Coming soon |
| Toolathlon | Coming soon | 49.5% | Coming soon |
| Claw-Eval | Coming soon | 67.1% | Coming soon |
| HLE w/ tools | Coming soon | 47.2% | Coming soon |
| Gert Labs | Coming soon | 51.57% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: 30.2 (Estimated · #96/150)

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.8% | 59.5% | Muse Spark 1.3 |
| DeepSWE | 75.4% | Coming soon | Coming soon |
| SWE-Atlas Codebase QnA | 59.4% | Coming soon | Coming soon |
| CursorBench 4.0 | 41.6% | Coming soon | Coming soon |
| Bug Hunt Bench | 32.2 fixes | Coming soon | Coming soon |
| FrontierSWE v2 | 25.8% | Coming soon | Coming soon |
| SWE-bench Pro | Coming soon | 56.3% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: 82.9 (#6/28)
- Step 3.7 Flash public-lane score: 76.5 (Unranked · 2 rankable rows)

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| MRCR v2 256K-512K | 98.5% | Coming soon | Coming soon |
| MRCR v2 512K-1M | 98.1% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: 75.4 (Unranked · 3 rankable rows)

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| SimpleVQA | Coming soon | 79.2% | Coming soon |
| V* | Coming soon | 95.3% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: 45 (Estimated · #97/184)

### Instruction Following

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: 82.1 (#56/148)

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 15.9% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: 78.5 (Unranked · 2 rankable rows)
- Step 3.7 Flash public-lane score: Coming soon

| Benchmark | Muse Spark 1.3 | Step 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 74.035% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 46.341% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Muse Spark 1.3 and Step 3.7 Flash?

Not yet. The models share only 3 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Muse Spark 1.3 vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-muse-spark-1-3)
- [Step 3.7 Flash vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-step-3-7-flash)
- [Muse Spark 1.3 vs Muse Spark 1.2](/compare/muse-spark-1-2-vs-muse-spark-1-3)
- [Step 3.7 Flash vs Muse Spark 1.2](/compare/muse-spark-1-2-vs-step-3-7-flash)

## Explore More

- [Muse Spark 1.3 profile](/models/muse-spark-1-3)
- [Step 3.7 Flash profile](/models/step-3-7-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)