Fugu vs Fugu Ultra v2
Too close to call on our weighted score (Fugu 66, Fugu Ultra v2 66). The right pick depends on what you value most.
Sakana AIFugu
66/100- ECI—
- Price—
- Context1M
- Sakana AI
Fugu Ultra v2
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 v2 66/100), so choose by what matters most for your work: Fugu Ultra v2 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 Ultra v2Fugu Ultra v2 $11.25 per 1M tokens (3:1 blend) · Fugu unpriced
- Longest contextAbout the sameFugu 1,000,000 · Fugu Ultra v2 1,000,000 tokens
- Widest inputsFugu Ultra v2Fugu: Text, Images · Fugu Ultra v2: Text, Images, PDFs
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Fugu | Fugu Ultra v2 |
|---|---|---|---|
| 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 Ultra v2Sakana AI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | — | $5.00 |
| Output | — | $30.00 |
| Cached input | — | — |
| Blended (3:1) | — | $11.25 |
| Long-context rate | — | Same rate |
| Price source | — | Median of 6 providers |
| Limits | ||
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Max output | — | 128,000 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | Yes |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yeshigh · xhigh | Yes |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | fugu | — |
| API providers | 1 | 6 (best) |
| Released | Jun 15, 2026 | Sep 11, 2026 |
| Knowledge cutoff | — | Aug 28, 2026 |
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 v2$110.00
Which should you choose?
Which is better: Fugu or Fugu Ultra v2?
It is close. Our weighted score puts them within a point (Fugu 66/100, Fugu Ultra v2 66/100), so choose by what matters most for your work: Fugu Ultra v2 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 v2?
Fugu Ultra v2 is cheaper at $5.00 input / $30.00 output per million tokens (median across 6 API providers). . At a typical mix of three input tokens to one output token, that is $11.25 per million tokens for Fugu Ultra v2 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 v2 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Fugu and Fugu Ultra v2 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 v2 share the same 1,000,000-token context window. Maximum output per response: Fugu Ultra v2 up to 128,000 tokens.
Which can read images, PDFs, audio or video?
Fugu accepts text and images; Fugu Ultra v2 accepts text, images and PDFs. Fugu Ultra v2 handles the widest range of inputs.
Are any of these open source?
No. Fugu and Fugu Ultra v2 are proprietary and only available through APIs and apps.
Which is newer?
Fugu Ultra v2 is the newest, released Sep 11, 2026. Fugu came out Jun 15, 2026. Knowledge cutoff: Fugu Ultra v2 Aug 28, 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 Nov 2, 2026.
