# Muse Spark vs Step 5 Preview

> Side-by-side benchmark comparison for Muse Spark and Step 5 Preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/muse-spark-vs-step-5-preview
- Last updated: September 21, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Step 5 Preview if you want the stronger benchmark profile. Muse Spark only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Step 5 Preview leads overall 72 to 67.29.
- The clearest category separation is in reasoning, where the averages are 45.1 for Muse Spark and 78.5 for Step 5 Preview.
- The biggest single benchmark swing is CyberGym in Agentic, with scores of 43.5% and 84.7%.
- Step 5 Preview also has the larger context window at 1M.

## Model Snapshot

| Property | Muse Spark | Step 5 Preview |
|----------|----------|----------|
| Creator | Meta | StepFun |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 1M |
| Overall Score | 67.29 | null |
| Benchmarks Covered | 27 | 22 |
| Pricing (input/output) | N/A | $1.00 / $2.70 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Muse Spark public-lane score: 58.3 (Supported · #31/154)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Muse Spark | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59% | Coming soon | Coming soon |
| τ²-bench results | 91.5% | Coming soon | Coming soon |
| DeepSearchQA | 74.8% | Coming soon | Coming soon |
| CyberGym | 43.5% | 84.7% | Step 5 Preview |
| Claw-Eval | 63.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 85.0% | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 33.30% | Coming soon |
| AutomationBench | Coming soon | 44.0% | Coming soon |
| Toolathlon-Verified | Coming soon | 74.1% | Coming soon |
| MCP Atlas | Coming soon | 85.6% | Coming soon |
| JobBench | Coming soon | 59.0% | Coming soon |
| APEX-Agents | Coming soon | 37.8% | Coming soon |
| DRACO | Coming soon | 83.3% | Coming soon |
| BrowseComp | Coming soon | 88.7% | Coming soon |
| Agents' Last Exam | Coming soon | 29.5% | Coming soon |

### Coding

- Winner: Coming soon
- Muse Spark public-lane score: 59.3 (Supported · #25/156)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Muse Spark | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 77.4% | Coming soon | Coming soon |
| SWE-bench Pro | 52.4% | Coming soon | Coming soon |
| LiveCodeBench Pro | 80.0% | Coming soon | Coming soon |
| Vibe Code Bench | 19.67% | Coming soon | Coming soon |
| SWE-bench (Vals) | 74.4% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 67.7% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 85.0% | Coming soon |
| SciCode | Coming soon | 58.9% | Coming soon |
| ProgramBench | Coming soon | 80.5% | Coming soon |
| sweMarathon | Coming soon | 72.7% | Coming soon |
| MLS-Bench Lite | Coming soon | 40.5% | Coming soon |

### Reasoning

- Winner: Coming soon
- Muse Spark public-lane score: 45.1 (Unranked · 3 rankable rows)
- Step 5 Preview public-lane score: 78.5 (Unranked · 2 rankable rows)

| Benchmark | Muse Spark | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 42.5% | Coming soon | Coming soon |
| CritPt | Coming soon | 20.9% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Muse Spark public-lane score: 77.5 (#13/49)
- Step 5 Preview public-lane score: 61.2 (#28/49)

| Benchmark | Muse Spark | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 86.4% | Coming soon | Coming soon |
| MMMU-Pro | 80.4% | 76% | Muse Spark |
| ERQA | 64.7% | Coming soon | Coming soon |
| SimpleVQA | 71.3% | Coming soon | Coming soon |
| ScreenSpot Pro | 84.1% | Coming soon | Coming soon |
| ZeroBench | 33.0% | Coming soon | Coming soon |
| MedXpertQA (MM) | 78.4% | Coming soon | Coming soon |
| OfficeQA Pro | Coming soon | 60.3% | Coming soon |

### Knowledge

- Winner: Coming soon
- Muse Spark public-lane score: 65.3 (Supported · #23/186)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Muse Spark | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 89.5% | 93.5% | Step 5 Preview |
| HLE | 50.4% | 46.5% | Muse Spark |
| HLE w/o tools | 42.8% | Coming soon | Coming soon |
| HealthBench Hard | 42.8% | Coming soon | Coming soon |
| MedXpertQA (Text) | 52.6% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 89.6% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 87.3% | Coming soon | Coming soon |

### Instruction Following

- Winner: Coming soon
- Muse Spark public-lane score: 91.9 (#8/124)
- Step 5 Preview public-lane score: Coming soon

### Mathematics

- Winner: Coming soon
- Muse Spark public-lane score: 55.1 (Unranked · 2 rankable rows)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Muse Spark | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 39.000% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 14.600% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Muse Spark or Step 5 Preview?

Step 5 Preview is ahead overall on BenchLM right now.

### Where is the biggest gap between Muse Spark and Step 5 Preview?

The widest category gap is in reasoning, where the averages are 45.1 for Muse Spark and 78.5 for Step 5 Preview.

### How many benchmarks does Muse Spark cover on BenchLM?

Muse Spark currently has 27 sourced benchmark scores on BenchLM.

### How many benchmarks does Step 5 Preview cover on BenchLM?

Step 5 Preview currently has 22 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Muse Spark vs Muse Spark 1.2](/compare/muse-spark-vs-muse-spark-1-2)
- [Step 5 Preview vs Muse Spark 1.2](/compare/muse-spark-1-2-vs-step-5-preview)
- [Muse Spark vs Muse Spark 1.1](/compare/muse-spark-vs-muse-spark-1-1)
- [Step 5 Preview vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-step-5-preview)

## Explore More

- [Muse Spark profile](/models/muse-spark)
- [Step 5 Preview profile](/models/step-5-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)