# Ornith-1.5-397B vs Sakana Fugu-Ultra

> Side-by-side benchmark comparison for Ornith-1.5-397B and Sakana Fugu-Ultra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/ornith-1-5-397b-vs-sakana-fugu-ultra
- Last updated: October 2, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Sakana Fugu-Ultra leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Sakana Fugu-Ultra has the higher overall point estimate 75 to 62.72. Conditional score ranges do not establish rank confidence.
- The biggest single benchmark swing is SWE-bench Pro in Coding, with scores of 65.1% and 73.7%.
- Sakana Fugu-Ultra is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Sakana Fugu-Ultra also has the larger context window at 1M.

## Model Snapshot

| Property | Ornith-1.5-397B | Sakana Fugu-Ultra |
|----------|----------|----------|
| Creator | Ornith AI | Sakana AI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 1M |
| Overall Score | 62.72 | null |
| Benchmarks Covered | 18 | 11 |
| Pricing (input/output) | $0.00 / $0.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Ornith-1.5-397B public-lane score: 56.8 (Estimated · #29/119)
- Sakana Fugu-Ultra public-lane score: Coming soon

| Benchmark | Ornith-1.5-397B | Sakana Fugu-Ultra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 86.1% | 82.1% | Ornith-1.5-397B |
| HLE w/ tools | 56.1% | Coming soon | Coming soon |
| MCP Atlas | 80% | Coming soon | Coming soon |
| Toolathlon-Verified | 71.2% | Coming soon | Coming soon |
| WideResearch | 80.8% | Coming soon | Coming soon |
| BrowseComp | 86.6% | Coming soon | Coming soon |
| Claw-Eval | 81.4% | Coming soon | Coming soon |

### Coding

- Winner: Not comparable
- Ornith-1.5-397B public-lane score: 54.7 (Estimated · #34/144)
- Sakana Fugu-Ultra public-lane score: Coming soon

| Benchmark | Ornith-1.5-397B | Sakana Fugu-Ultra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 86.1% | 82.1% | Ornith-1.5-397B |
| SWE-bench Verified | 86% | Coming soon | Coming soon |
| SWE-bench Pro | 65.1% | 73.7% | Sakana Fugu-Ultra |
| SWE Multilingual | 79.6% | Coming soon | Coming soon |
| DeepSWE | 56.0% | Coming soon | Coming soon |
| frontierBench | 13.5% | Coming soon | Coming soon |
| NL2Repo | 59.5% | Coming soon | Coming soon |
| LiveCodeBench v6 | Coming soon | 93.2% | Coming soon |
| LiveCodeBench Pro | Coming soon | 90.8% | Coming soon |
| SciCode | Coming soon | 58.7% | Coming soon |

### Reasoning

- Winner: Not comparable
- Ornith-1.5-397B public-lane score: Coming soon
- Sakana Fugu-Ultra public-lane score: 79 (Unranked · 1 rankable row)

| Benchmark | Ornith-1.5-397B | Sakana Fugu-Ultra | Winner |
|-----------|-----------|-----------|--------|
| MRCRv2 | Coming soon | 93.6% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Ornith-1.5-397B public-lane score: Coming soon
- Sakana Fugu-Ultra public-lane score: 73.6 (Unranked · 1 rankable row)

| Benchmark | Ornith-1.5-397B | Sakana Fugu-Ultra | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | Coming soon | 86.6% | Coming soon |

### Knowledge

- Winner: Not comparable
- Ornith-1.5-397B public-lane score: 63.3 (Estimated · #36/171)
- Sakana Fugu-Ultra public-lane score: Coming soon

| Benchmark | Ornith-1.5-397B | Sakana Fugu-Ultra | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.8% | 95.5% | Sakana Fugu-Ultra |
| GPQA-D | 92.8% | 95.5% | Sakana Fugu-Ultra |
| HLE | 44.6% | Coming soon | Coming soon |
| HLE w/o tools | 44.6% | 50% | Sakana Fugu-Ultra |

## FAQ

### Which is better overall, Ornith-1.5-397B or Sakana Fugu-Ultra?

Sakana Fugu-Ultra has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### How many benchmarks does Ornith-1.5-397B cover on BenchLM?

Ornith-1.5-397B currently has 18 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

- [Ornith-1.5-397B vs Ornith-1.5-35B-A3B](/compare/ornith-1-5-35b-a3b-vs-ornith-1-5-397b)
- [Sakana Fugu-Ultra vs Ornith-1.5-35B-A3B](/compare/ornith-1-5-35b-a3b-vs-sakana-fugu-ultra)
- [Ornith-1.5-397B vs Ornith-1.5-9B](/compare/ornith-1-5-397b-vs-ornith-1-5-9b)
- [Sakana Fugu-Ultra vs Ornith-1.5-9B](/compare/ornith-1-5-9b-vs-sakana-fugu-ultra)

## Explore More

- [Ornith-1.5-397B profile](/models/ornith-1-5-397b)
- [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)