# Muse Spark vs Sakana Fugu-Ultra

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

- Canonical page: https://benchlm.ai/compare/muse-spark-vs-sakana-fugu-ultra
- Last updated: September 28, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick Sakana Fugu-Ultra 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

- Sakana Fugu-Ultra leads overall 74 to 60.78.
- The clearest category separation is in reasoning, where the averages are 53.4 for Muse Spark and 79.1 for Sakana Fugu-Ultra.
- The biggest single benchmark swing is SWE-bench Pro in Coding, with scores of 52.4% and 73.7%.
- Sakana Fugu-Ultra also has the larger context window at 1M.

## Model Snapshot

| Property | Muse Spark | Sakana Fugu-Ultra |
|----------|----------|----------|
| Creator | Meta | Sakana AI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 1M |
| Overall Score | 60.78 | null |
| Benchmarks Covered | 27 | 11 |
| Pricing (input/output) | N/A | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Muse Spark public-lane score: 49.6 (Estimated · #39/117)
- Sakana Fugu-Ultra public-lane score: Coming soon

| Benchmark | Muse Spark | Sakana Fugu-Ultra | 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% | Coming soon | Coming soon |
| Claw-Eval | 63.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 82.1% | Coming soon |

### Coding

- Winner: Not comparable
- Muse Spark public-lane score: 53.1 (Supported · #34/142)
- Sakana Fugu-Ultra public-lane score: Coming soon

| Benchmark | Muse Spark | Sakana Fugu-Ultra | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 77.4% | Coming soon | Coming soon |
| SWE-bench Pro | 52.4% | 73.7% | Sakana Fugu-Ultra |
| LiveCodeBench Pro | 80.0% | 90.8% | Sakana Fugu-Ultra |
| Vibe Code Bench | 19.67% | Coming soon | Coming soon |
| SWE-bench (Vals) | 74.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 82.1% | Coming soon |
| LiveCodeBench v6 | Coming soon | 93.2% | Coming soon |
| SciCode | Coming soon | 58.7% | Coming soon |

### Reasoning

- Winner: Not comparable
- Muse Spark public-lane score: 53.4 (Unranked · 3 rankable rows)
- Sakana Fugu-Ultra public-lane score: 79.1 (Unranked · 1 rankable row)

| Benchmark | Muse Spark | Sakana Fugu-Ultra | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 42.5% | Coming soon | Coming soon |
| MRCRv2 | Coming soon | 93.6% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Muse Spark public-lane score: 78.5 (#14/50)
- Sakana Fugu-Ultra public-lane score: 73.6 (Unranked · 1 rankable row)

| Benchmark | Muse Spark | Sakana Fugu-Ultra | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 86.4% | 86.6% | Sakana Fugu-Ultra |
| MMMU-Pro | 80.4% | Coming soon | Coming soon |
| 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 |

### Knowledge

- Winner: Not comparable
- Muse Spark public-lane score: 60.8 (Supported · #37/168)
- Sakana Fugu-Ultra public-lane score: Coming soon

| Benchmark | Muse Spark | Sakana Fugu-Ultra | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 89.5% | 95.5% | Sakana Fugu-Ultra |
| HLE | 50.4% | Coming soon | Coming soon |
| HLE w/o tools | 42.8% | 50% | Sakana Fugu-Ultra |
| 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 |
| GPQA | Coming soon | 95.5% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Muse Spark public-lane score: 91.9 (#8/124)
- Sakana Fugu-Ultra public-lane score: Coming soon

### Mathematics

- Winner: Not comparable
- Muse Spark public-lane score: 55.1 (Unranked · 2 rankable rows)
- Sakana Fugu-Ultra public-lane score: Coming soon

| Benchmark | Muse Spark | Sakana Fugu-Ultra | 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 Sakana Fugu-Ultra?

Sakana Fugu-Ultra is ahead overall on BenchLM right now.

### Where is the biggest gap between Muse Spark and Sakana Fugu-Ultra?

The widest category gap is in reasoning, where the averages are 53.4 for Muse Spark and 79.1 for Sakana Fugu-Ultra.

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

Muse Spark currently has 27 sourced benchmark scores on BenchLM.

### How many benchmarks does Sakana Fugu-Ultra cover on BenchLM?

Sakana Fugu-Ultra currently has 11 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Muse Spark vs Muse Spark 1.1](/compare/muse-spark-vs-muse-spark-1-1)
- [Sakana Fugu-Ultra vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-sakana-fugu-ultra)
- [Muse Spark vs Muse Spark 1.2](/compare/muse-spark-vs-muse-spark-1-2)
- [Sakana Fugu-Ultra vs Muse Spark 1.2](/compare/muse-spark-1-2-vs-sakana-fugu-ultra)

## Explore More

- [Muse Spark profile](/models/muse-spark)
- [Sakana Fugu-Ultra profile](/models/sakana-fugu-ultra)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)