Fugu Ultra API Pricing
Sakana Fugu Ultra is the performance-optimized tier of Sakana Fugu, a multi-agent system delivered as one OpenAI-compatible model API. It lists at $5/M input, $30/M output and $0.50/M cached input, with higher rates once context exceeds 272K. Sakana now versions the model: fugu-ultra is an alias that serves v1.1, and the dated id this page was built around, fugu-ultra-20260615, is the vendor's own alias for v1.0. One price card covers both — the released version moved, the rate did not.
Run the numbers.
Live calculator pre-loaded with the standard Fugu Ultra token rates. For prompts whose context exceeds 272K, use the FAQ long-context rates or the scenario marked long-context.
Real-world presets.
Repo-wide code review
Competition experiment loop
Patent landscape investigation
Scoped security assessment
Paste text. See tokens. See cost.
This is a chars-per-token approximation, not a real tokenizer. Actual tokens vary by language, code density, and tool-call overhead — counts are typically ±10–20% off for English prose, more for code or non-Latin scripts. For exact billing, use the vendor's official tokenizer.
| Model | Input /M | Output /M | Effective blended | Context | Best for |
|---|---|---|---|---|---|
| Fugu Ultra Current | $5.00 cache $0.50 | $30.00 | $3.61 agentic 92/8 | 272K | Hard multi-agent orchestration |
| GPT-5.6 Sol | $4.00 cache $0.40 | $20.00 | $2.73 same headline rates | 1.05M | OpenAI preview frontier tier |
| Claude Fable 5 | $10.00 cache $1.00 | $50.00 | $6.82 same blend | 1M | Generally available Mythos-class agents |
| Claude Mythos 5 | $10.00 cache $1.00 | $50.00 | $6.82 restricted | 1M | Restricted high-trust agent work |
| Claude Opus 4.8 | $5.00 cache $0.50 | $25.00 | $3.41 same blend | 1M | Anthropic Opus alternative |
| Gemini 3.5 Flash | $1.50 cache $0.15 | $9.00 | $1.08 same blend | 1M | Lower-cost multimodal context |
| Kimi K2.7 Code | $0.95 cache $0.19 | $4.00 | $0.621 same blend | 262K | Code-focused lower-cost routing |
| GLM-5.2 | $1.40 cache $0.26 | $4.40 | $0.78 same blend | 1M | Low-cost long-context agent work |
Compare adjacent tiers
Frequently asked.
Fugu Ultra has a fixed public token row, but Sakana Fugu itself is a multi-agent model API, so the page separates published prices from orchestration behavior and regional limits.
Q · 01 How much does Fugu Ultra cost? +
fugu-ultra-20260615 at $5/M input tokens, $30/M output tokens, and $0.50/M cached input tokens on the official Fugu page, verified 2026-06-28.Q · 02 What happens above 272K context? +
272K: $10/M input, $45/M output, and $1.00/M cached input. AI//COST keeps those as long-context rates instead of blending them into the headline price.Q · 03 Is Fugu Ultra just a wrapper around other models? +
Q · 04 Is Sakana Fugu available in the EU or EEA? +
Q · 05 How is regular Fugu priced? +
Q · 06 Which version does fugu-ultra serve now? +
fugu-ultra-v1.0 as "V1.0 of Fugu Ultra, also known as fugu-ultra-20260615" — the dated id in this page's URL. Both versions bill from the one card above, so nothing here changes with the version; pin fugu-ultra-v1.0 if you need the older behaviour. One caveat on the benchmark scores Sakana publishes: the vendor notes they are measured on v1.0 models.