# Muse Ember vs Muse Spark Open

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

- Canonical page: https://benchlm.ai/compare/muse-ember-vs-muse-spark-open
- Last updated: November 9, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Muse Ember and Muse Spark Open.

## Summary

- Muse Ember and Muse Spark Open do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Muse Ember | Muse Spark Open |
|----------|----------|----------|
| Creator | Meta | Meta |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 56.24 | 51.08 |
| Benchmarks Covered | 4 | 9 |
| Pricing (input/output) | $0.10 / $0.50 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Muse Ember public-lane score: Coming soon
- Muse Spark Open public-lane score: 51.9 (Estimated · #51/132)

| Benchmark | Muse Ember | Muse Spark Open | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 40.90% | Coming soon | Coming soon |
| OSWorld 2.1 | 69.5% | Coming soon | Coming soon |
| Agents' Last Exam (Linux) | 61.6% | Coming soon | Coming soon |
| JobBench | Coming soon | 61.8% | Coming soon |
| MCP Atlas | Coming soon | 89.2% | Coming soon |
| HLE w/ tools | Coming soon | 61.0% | Coming soon |
| Toolathlon-Verified | Coming soon | 72.8% | Coming soon |
| MazeBench | Coming soon | 0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Muse Ember public-lane score: Coming soon
- Muse Spark Open public-lane score: 51.4 (Supported · #45/158)

| Benchmark | Muse Ember | Muse Spark Open | Winner |
|-----------|-----------|-----------|--------|
| FrontierCode 2.0 | Coming soon | 6.2% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Muse Ember public-lane score: Coming soon
- Muse Spark Open public-lane score: 47.9 (Estimated · #57/157)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Muse Ember public-lane score: Coming soon
- Muse Spark Open public-lane score: Coming soon

| Benchmark | Muse Ember | Muse Spark Open | Winner |
|-----------|-----------|-----------|--------|
| PerceptionBench (tools) | 80.6% | 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
- Muse Ember public-lane score: Coming soon
- Muse Spark Open public-lane score: 56.5 (Estimated · #56/179)

## FAQ

### Can I compare Muse Ember and Muse Spark Open on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Muse Ember vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-muse-ember)
- [Muse Spark Open vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-muse-spark-open)
- [Muse Ember vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-muse-ember)
- [Muse Spark Open vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-muse-spark-open)

## Explore More

- [Muse Ember profile](/models/muse-ember)
- [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)