# Fugu Ultra (slim)

> Fugu Ultra, a family of models by Sakana, listed from OpenRouter. Indexed, not reviewed: facts and our own checks, no score or ranking. Fugu Ultra is the higher-performance model in Sakana AI's Fugu family. Rather than a single monolithic model, Fugu is a learned multi-agent…

- Full: https://www.anchorterminal.com/tools/fugu-ultra.md (~500 tokens) · this version ~430 tokens · JSON https://www.anchorterminal.com/tools/fugu-ultra.json · canonical https://www.anchorterminal.com/tools/fugu-ultra
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-04

# Fugu Ultra

> Indexed, not reviewed: facts from OpenRouter and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: model family, by Sakana
- Category: Model APIs & inference (https://www.anchorterminal.com/categories/inference.md)
- Listed because: OpenRouter lists it, with prices from the providers that serve it.
- What OpenRouter says: Fugu Ultra 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 route...

## Models (1)

| Model | OpenRouter id | Released | Context | Input $/1M | Output $/1M | Supports |
| --- | --- | --- | --- | --- | --- | --- |
| Fugu Ultra | `sakana/fugu-ultra` | 2026-06 | 1M | $5 | $30 | tools, structured output, reasoning, caching, image |

Prices and limits as OpenRouter lists them; a provider's own price can differ.

- JSON: https://www.anchorterminal.com/api/v1/tools/fugu-ultra.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming