Fugu vs Fugu Ultra
Too close to call on our weighted score (Fugu 66, Fugu Ultra 66). The right pick depends on what you value most.
Sakana AI
Fugu
66/100- ECI—
- Price—
- Context1M
Sakana AI
Fugu Ultra
66/100- ECI—
- Price$5.00 / $30.00
- Context1M
Add a model
Make it a three-way comparison.
Too close to call
It is close. Our weighted score puts them within a point (Fugu 66/100, Fugu Ultra 66/100), so choose by what matters most for your work: Fugu Ultra on price. The score weighs inputs & features 60%, context window 40%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceFugu UltraFugu Ultra $11.25 per 1M tokens (3:1 blend) · Fugu unpriced
- Longest contextAbout the sameFugu 1,000,000 · Fugu Ultra 1,000,000 tokens
- Widest inputsSame inputsFugu: Text, Images · Fugu Ultra: Text, Images
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Fugu | Fugu Ultra |
|---|---|---|---|
| Inputs & features | 60% | 70 | 70 |
| Context window | 40% | 60 | 60 |
| Overall | 100% | 66/100 | 66/100 |
Left out because at least one model lacks the data: capability and price. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | FuguSakana AI | Fugu UltraSakana AI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | — | $5.00 |
| Output | — | $30.00 |
| Cached input | — | $0.50 |
| Blended (3:1) | — | $11.25 |
| Long-context rate | — | Over 272K: $10.00 / $45.00 |
| Price source | — | Official Sakana AI API |
| Limits | ||
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Max output | — | — |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yeshigh · xhigh | Yeshigh · xhigh |
| Tool calling | Yes | Yes |
| Structured output | Yes | Yes |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | fugu | fugu-ultra |
| API providers | 1 | 11 (best) |
| Released | Jun 15, 2026 | Jun 15, 2026 |
| Knowledge cutoff | — | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Fugu—
- Fugu Ultra$110.00
Which should you choose?
Which is better: Fugu or Fugu Ultra?
It is close. Our weighted score puts them within a point (Fugu 66/100, Fugu Ultra 66/100), so choose by what matters most for your work: Fugu Ultra on price. The score weighs inputs & features 60%, context window 40%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Fugu or Fugu Ultra?
Fugu Ultra is cheaper at $5.00 input / $30.00 output per million tokens (official Sakana AI API price). . At a typical mix of three input tokens to one output token, that is $11.25 per million tokens for Fugu Ultra versus . Fugu has no published per-token price.
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Fugu has not been scored yet and Fugu Ultra has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Fugu and Fugu Ultra yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
Fugu and Fugu Ultra share the same 1,000,000-token context window.
Which can read images, PDFs, audio or video?
Fugu accepts text and images; Fugu Ultra accepts text and images. They handle the same number of input types.
Are any of these open source?
No. Fugu and Fugu Ultra are proprietary and only available through APIs and apps.
Which is newer?
Fugu is the newest, released Jun 15, 2026. Fugu Ultra came out Jun 15, 2026.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
