# Sakana Fugu-Ultra vs Ultramarine 1 Flash

> Side-by-side benchmark comparison for Sakana Fugu-Ultra and Ultramarine 1 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/sakana-fugu-ultra-vs-ultramarine-1-flash
- Last updated: October 15, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Sakana Fugu-Ultra and Ultramarine 1 Flash share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Sakana Fugu-Ultra has the lower published output-token price.
- Sakana Fugu-Ultra has the larger published context window at 1M.

## Model Snapshot

| Property | Sakana Fugu-Ultra | Ultramarine 1 Flash |
|----------|----------|----------|
| Creator | Sakana AI | Paper Instruments |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | Not disclosed |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 11 | 5 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $0.15 / $0.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Sakana Fugu-Ultra public-lane score: Coming soon
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Sakana Fugu-Ultra | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 82.1% | 83.2% | Ultramarine 1 Flash |
| JobBench | Coming soon | 62.9% | Coming soon |
| AutomationBench | Coming soon | 50.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Sakana Fugu-Ultra public-lane score: Coming soon
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Sakana Fugu-Ultra | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 73.7% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 82.1% | 83.2% | Ultramarine 1 Flash |
| LiveCodeBench v6 | 93.2% | Coming soon | Coming soon |
| LiveCodeBench Pro | 90.8% | Coming soon | Coming soon |
| SciCode | 58.7% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 61.5% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Sakana Fugu-Ultra public-lane score: 84.4 (Unranked · 1 rankable row)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Sakana Fugu-Ultra | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| MRCRv2 | 93.6% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Sakana Fugu-Ultra public-lane score: 77.1 (Unranked · 1 rankable row)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Sakana Fugu-Ultra | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 86.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Sakana Fugu-Ultra public-lane score: Coming soon
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Sakana Fugu-Ultra | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 95.5% | Coming soon | Coming soon |
| GPQA-D | 95.5% | Coming soon | Coming soon |
| HLE w/o tools | 50% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Sakana Fugu-Ultra and Ultramarine 1 Flash?

Not yet. The models share only 2 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

- [Sakana Fugu-Ultra vs Sakana Fugu](/compare/sakana-fugu-vs-sakana-fugu-ultra)
- [Ultramarine 1 Flash vs Sakana Fugu](/compare/sakana-fugu-vs-ultramarine-1-flash)
- [Sakana Fugu-Ultra vs Fugu Cyber](/compare/sakana-fugu-cyber-vs-sakana-fugu-ultra)
- [Ultramarine 1 Flash vs Fugu Cyber](/compare/sakana-fugu-cyber-vs-ultramarine-1-flash)

## Explore More

- [Sakana Fugu-Ultra profile](/models/sakana-fugu-ultra)
- [Ultramarine 1 Flash profile](/models/ultramarine-1-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)