Fugu Ultra v2 pricing and routing profile
Fugu Ultra v2 from Sakana lists at $5.00 per million input tokens and $30.00 per million output tokens, with a 1,000,000-token context window. Prices from OpenRouter's catalogue on 2026-09-28.
Tool callingStructured outputReasoning control
Cost per 1,000 requests
| Request shape | List cost |
|---|---|
| Classification or routing (600 tokens in, 10 out) | $3.30 |
| Chat reply (2,000 in, 400 out) | $22.00 |
| Retrieval-augmented answer (8,000 in, 500 out) | $55.00 |
Before prompt caching. Try your own shape in the cost calculator.
Can Gimbix route to it first?
Not as a first-answer model through OpenRouter: no host returns token log probabilities for Fugu Ultra v2. It can still be the model Gimbix falls back to when a cheaper model is unsure.
Cheaper models that can answer first
Models priced below Fugu Ultra v2 that expose a confidence signal. Whether they answer your traffic as well is what a Gimbix pilot measures.
| Model | Input / output per 1M | Cheaper on a chat reply |
|---|---|---|
| Qwen3.8 Max Prime | $4.00 / $12.00 | 42% |
| Ember-1 | $3.00 / $15.00 | 45% |
| Kimi K3 | $3.00 / $15.00 | 45% |
| GLM 5.3 Prime | $2.80 / $8.80 | 59% |
| GPT Audio | $2.50 / $10.00 | 59% |
| GPT-4o (2024-11-20) | $2.50 / $10.00 | 59% |
Questions
How much does Fugu Ultra v2 cost?
Fugu Ultra v2 lists at $5.00 per million input tokens and $30.00 per million output tokens on OpenRouter as of 2026-09-28. A typical chat reply of 2,000 input and 400 output tokens costs about $22.00 per 1,000 requests.
What is the context window of Fugu Ultra v2?
1,000,000 tokens.
Can a cheaper model replace Fugu Ultra v2?
Sometimes. Gimbix proves it on your own traffic before routing: the cheaper model must match Fugu Ultra v2 on one half of your requests and make at most three answers worse on the other.