# Hy4 vs Muse Spark Open

> Side-by-side benchmark comparison for Hy4 and Muse Spark Open across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/hy4-vs-muse-spark-open
- Last updated: November 4, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Hy4 and Muse Spark Open share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Muse Spark Open has the lower published output-token price.

## Model Snapshot

| Property | Hy4 | Muse Spark Open |
|----------|----------|----------|
| Creator | Tencent | Meta |
| Type | Pending | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | null | 50.48 |
| Benchmarks Covered | 15 | 8 |
| Pricing (input/output) | $0.834 / $2.501 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Hy4 public-lane score: Coming soon
- Muse Spark Open public-lane score: 51.3 (Estimated · #51/135)

| Benchmark | Hy4 | Muse Spark Open | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 44.40% | Coming soon | Coming soon |
| Terminal-Bench-Science 0.1 | 19.8% | Coming soon | Coming soon |
| HLE w/ tools | 59.1% | 61.0% | Muse Spark Open |
| Agents' Last Exam | 41.0% | Coming soon | Coming soon |
| APEX-Agents | 75.2% | Coming soon | Coming soon |
| AutomationBench | 56.2% | Coming soon | Coming soon |
| OSWorld 2.1 | 78.9% | Coming soon | Coming soon |
| JobBench | Coming soon | 61.8% | Coming soon |
| MCP Atlas | Coming soon | 89.2% | Coming soon |
| Toolathlon-Verified | Coming soon | 72.8% | Coming soon |
| MazeBench | Coming soon | 0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Hy4 public-lane score: Coming soon
- Muse Spark Open public-lane score: 51 (Supported · #43/156)

| Benchmark | Hy4 | Muse Spark Open | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 74.9% | Coming soon | Coming soon |
| sweMarathon | 43.8% | Coming soon | Coming soon |
| ProgramBench | 30.0% | Coming soon | Coming soon |
| FrontierCode 2.0 | 31.0% | Coming soon | Coming soon |
| PostTrainBench v1.2 | 35.2% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Hy4 public-lane score: Coming soon
- Muse Spark Open public-lane score: 78.8 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Hy4 public-lane score: Coming soon
- Muse Spark Open public-lane score: 83.9 (Unranked · 4 rankable rows)

| Benchmark | Hy4 | Muse Spark Open | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 78.6% | Coming soon | Coming soon |
| ZeroBench w/ Python | 55.4% | Coming soon | Coming soon |
| ZeroBench | Coming soon | 50.0% | Coming soon |
| BabyVision | Coming soon | 80.2% | Coming soon |
| SimpleVQA | Coming soon | 73.6% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Hy4 public-lane score: Coming soon
- Muse Spark Open public-lane score: 59.2 (Supported · #49/179)

| Benchmark | Hy4 | Muse Spark Open | Winner |
|-----------|-----------|-----------|--------|
| HLE | 59.1% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Hy4 and Muse Spark Open?

Not yet. The models share only 1 sourced benchmark row, 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

- [Hy4 vs Hy4 preview](/compare/hy4-vs-hy4-preview)
- [Muse Spark Open vs Hy4 preview](/compare/hy4-preview-vs-muse-spark-open)
- [Hy4 vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-hy4)
- [Muse Spark Open vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-muse-spark-open)

## Explore More

- [Hy4 profile](/models/hy4)
- [Muse Spark Open profile](/models/muse-spark-open)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)