Fugu Ultra v2
Summary
Fugu Ultra v2 is a language model from Sakana, released on 11 Sept 2026. It accepts text, images and files and generates text, with a 1M-token context window and up to 128K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $5 per million input tokens and $30 per million output tokens (OpenRouter), across 1 provider we track.
Fugu Ultra v2 is the higher-performance model in Sakana AI's Fugu family. Rather than a single monolithic model, Fugu is a learned multi-agent orchestration system: a language model trained to...
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Sakana |
|---|---|
| Release date | 11 Sept 2026 [OpenRouter] |
| Status | Generally available |
| Context window | 1M (1,000,000 tokens) [OpenRouter] |
| Max output | 128K tokens [OpenRouter] |
| Knowledge cutoff | 28 Aug 2026 [OpenRouter] |
| Input | Text, images and files [OpenRouter] |
| Output | Text [OpenRouter] |
| Reasoning mode | Yes [OpenRouter] |
| Tool calling | Yes [OpenRouter] |
| Structured output | Yes [OpenRouter] |
Fugu Ultra v2 API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenRouter sakana/fugu-ultra-v2 | $5 | $30 | $0.50 | 1M | OpenRouter, 4 Oct 2026 |
Frequently asked questions
What is the context window of Fugu Ultra v2?
Fugu Ultra v2 has a context window of 1,000,000 tokens (1M) and can generate up to 128,000 tokens in a single response, according to OpenRouter.
How much does the Fugu Ultra v2 API cost?
Fugu Ultra v2 is listed from $5 per million input tokens and $30 per million output tokens (OpenRouter). Prices last verified 4 Oct 2026.
When was Fugu Ultra v2 released?
Sakana released Fugu Ultra v2 on 11 Sept 2026, according to OpenRouter.
Change history
No changes detected since we started tracking this model. We re-check every source daily.