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Fugu Ultra
sakana·sakana/fugu-ultra·GA·Closed·fugu series·NEW
Quality-first multi-agent model for hard research, analysis, and competitions
At a glance
Official price$5.00 / $30.00 per 1M
Cache read $0.50 · Sakana AI
Lowest paid$4.50 / $27.00
Requesty Gateway · 1.2× spread
Context1,000,000
⚠ Providers report 1,000,000–1,048,576; the table below is authoritative
Output limit1,000,000
Capabilities
✓ Reasoning✓ Tool use✓ Structured outputTemperature✓ Attachments
⚠ Providers report capability flags inconsistently
Modalities
TextImage
Knowledge cutoff—
Released / updated2026-06-15 / 2026-06-15
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 11 providers11 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| Requesty | Gateway | $4.50 tiered >272K: $9.00 | $27.00 | $0.45 | — | 1,048,576 ⚠ | 131,072 | |
| OpenRouter | Gateway | $5.00 tiered >272K: $10.00 | $30.00 | $0.50 | — | 1,000,000 | 128,000 | |
| LLMTR | Gateway | $5.00 | $30.00 | — | — | 1,000,000 | 1,000,000 | |
| Merge Gateway | Gateway | $5.00 | $30.00 | $0.50 | — | 1,000,000 | 250,000 | |
| Sakana AIOfficial fugu-ultra-20260615 | First-party | $5.00 tiered >272K: $10.00 | $30.00 | $0.50 | — | 1,000,000 | 1,000,000 | |
| Sakana AIOfficial | First-party | $5.00 tiered >272K: $10.00 | $30.00 | $0.50 | — | 1,000,000 | 1,000,000 | |
| Vercel AI Gateway | Cloud | $5.00 | $30.00 | $0.50 | — | 1,000,000 | 1,000,000 | |
| DevPass (LLM Gateway) | Gateway | $5.00 | $30.00 | $0.50 | — | 1,000,000 | 1,000,000 | |
| Kilo Gateway | Gateway | $5.00 | $30.00 | $0.50 | — | 1,000,000 | 128,000 | |
| Pioneer | Gateway | $5.00 | $30.00 | $0.50 | $5.00 | 1,000,000 | 131,072 | |
| NanoGPT | Gateway | $5.25 | $31.50 | $0.525 | — | 1,000,000 | 16,384 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1Requesty$1,764.00
2OpenRouter$1,960.00
3Merge Gateway$1,960.00
4Sakana AI · Official$1,960.00
5Sakana AI · Official$1,960.00
6Vercel AI Gateway$1,960.00
Switch to Requesty to save $196.00/mo (10%). The gap is small, so staying on the official channel is fine.
Note: this is a gateway; verify availability and rate limits yourself.
Benchmark12 items
| Name | Conditions | Score | Metric | Source |
|---|---|---|---|---|
| SWE Bench Pro | — | 73.7 | — | Source ↗ |
| Terminal Bench 2.1 | — | 82.1 | — | Source ↗ |
| LiveCodeBench | — | 93.2 | — | Source ↗ |
| LiveCodeBench Pro | — | 90.8 | — | Source ↗ |
| Humanity’s Last Exam | — | 50 | — | Source ↗ |
| CharXiv Reasoning | — | 86.6 | — | Source ↗ |
| GPQA Diamond | — | 95.5 | — | Source ↗ |
| SciCode | — | 58.7 | — | Source ↗ |
| τ3 Banking | — | 20.6 | — | Source ↗ |
| Long Context Reasoning | — | 73.3 | — | Source ↗ |
| MRCRv2 | — | 93.6 | — | Source ↗ |
| CTI-REALM | — | 69.4 | — | Source ↗ |
The same benchmark scores very differently across harness / dataset, so the qualifying conditions must be shown together.
Reasoning control
effort = higheffort = xhigheffort = maxeffort = loweffort = medium
2 / 11 providers expose no reasoning control (reasoning_options: []).
Related models
Fugu Ultra v1.1same series$5.25 / $31.50Fugu Ultra (Sakana AI)same series$5.00 / $30.00Fugusame series—GLM-5.2cheaper alternative$1.40 / $4.40DeepSeek V4 Procheaper alternative$0.435 / $0.87DeepSeek V4 Flashcheaper alternative$0.14 / $0.28Kimi K3cheaper alternative$3.00 / $15.00
Price historyone sample accumulated per data sync
Input listOutput listMin blended