# GPT-5.6 Terra vs Fugu Cyber

> Side-by-side benchmark comparison for GPT-5.6 Terra and Fugu Cyber across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-6-terra-vs-sakana-fugu-cyber
- Last updated: September 4, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.6 Terra and Fugu Cyber 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.
- GPT-5.6 Terra has the lower published output-token price.
- GPT-5.6 Terra has the larger published context window at 1.05M.

## Model Snapshot

| Property | GPT-5.6 Terra | Fugu Cyber |
|----------|----------|----------|
| Creator | OpenAI | Sakana AI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Independent public score (not head-to-head) | 71.44 | null |
| Benchmarks Covered | 31 | 2 |
| Pricing (input/output) | $2.50 / $15.00 | $6.00 / $36.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.6 Terra public-lane score: 60.8 (Supported · #22/151)
- Fugu Cyber public-lane score: Coming soon

| Benchmark | GPT-5.6 Terra | Fugu Cyber | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 20.8% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 87.4% | Coming soon | Coming soon |
| BrowseComp | 87.5% | Coming soon | Coming soon |
| OSWorld 2.0 | 50.2% | Coming soon | Coming soon |
| CyberGym | 81.8% | 86.9% | Fugu Cyber |
| ExploitGym | 23.2% | Coming soon | Coming soon |
| Toolathlon | 53.1% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 77.5% | Coming soon | Coming soon |
| CTI-REALM | Coming soon | 72.1% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.6 Terra public-lane score: 67.2 (Supported · #9/183)
- Fugu Cyber public-lane score: Coming soon

| Benchmark | GPT-5.6 Terra | Fugu Cyber | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 63.4% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 87.4% | Coming soon | Coming soon |
| deepSwe | 69.6% | Coming soon | Coming soon |
| FrontierCode 1.1 Extended | 55.8% | Coming soon | Coming soon |
| cursorBench32 | 64.9% | Coming soon | Coming soon |
| VulcanBench v3 | 87.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 85.9% | Coming soon | Coming soon |
| SWE-bench (Vals) | 95.4% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.6 Terra public-lane score: 76.2 (#15/48)
- Fugu Cyber public-lane score: Coming soon

| Benchmark | GPT-5.6 Terra | Fugu Cyber | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 80.7% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 82% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.6 Terra public-lane score: 63.4 (#16/22)
- Fugu Cyber public-lane score: Coming soon

| Benchmark | GPT-5.6 Terra | Fugu Cyber | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 83.9% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.8% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.6 Terra public-lane score: 69.6 (Supported · #15/181)
- Fugu Cyber public-lane score: Coming soon

| Benchmark | GPT-5.6 Terra | Fugu Cyber | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.9% | Coming soon | Coming soon |
| GPQA-D | 92.9% | Coming soon | Coming soon |
| HLE-Verified | 51.1% | Coming soon | Coming soon |
| LABBench2 | 81.2% | Coming soon | Coming soon |
| HealthBench Professional | 57.7% | Coming soon | Coming soon |
| HealthBench Hard | 32.7% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 90.9% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 86.7% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.6 Terra public-lane score: 86.8 (#35/120)
- Fugu Cyber public-lane score: Coming soon

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.6 Terra public-lane score: 97 (Unranked · 3 rankable rows)
- Fugu Cyber public-lane score: Coming soon

| Benchmark | GPT-5.6 Terra | Fugu Cyber | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 84.9% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 84.900% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 68.300% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-5.6 Terra and Fugu Cyber?

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

- [GPT-5.6 Terra vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-gpt-5-6-terra)
- [Fugu Cyber vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-sakana-fugu-cyber)
- [GPT-5.6 Terra vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-gpt-5-6-terra)
- [Fugu Cyber vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-sakana-fugu-cyber)

## Explore More

- [GPT-5.6 Terra profile](/models/gpt-5-6-terra)
- [Fugu Cyber profile](/models/sakana-fugu-cyber)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)