Fugu
Summary
Fugu is a proprietary language model from Sakana, released on 15 Jun 2026. It accepts text and images and generates text, with a 1M-token context window and up to 1M output tokens per response.
Multi-agent model for routing expert agents across complex analytical tasks
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Sakana |
|---|---|
| Release date | 15 Jun 2026 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 1M (1,000,000 tokens) [models.dev] |
| Max output | 1M tokens [models.dev] |
| Input | Text and images [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
Fugu API pricing by provider
USD per million tokens. Sorted by input price.
We do not currently track a paid API listing for this model.
Frequently asked questions
What is the context window of Fugu?
Fugu has a context window of 1,000,000 tokens (1M) and can generate up to 1,000,000 tokens in a single response, according to models.dev.
Is Fugu open source?
No. Fugu is a proprietary model; Sakana has not released its weights.
When was Fugu released?
Sakana released Fugu on 15 Jun 2026, according to models.dev.
Change history
No changes detected since we started tracking this model. We re-check every source daily.