Fugu Ultra
Fugu Ultra is Sakana AI's quality-maximizing multi-agent system released June 21, 2026. Behind a single model API, Fugu Ultra coordinates a pool of expert agents to solve hard, multi-step problems. Available through AI Gateway with unified billing, observability, and provider routing.
Vision (Image)Tool UseReasoning
index.ts
import { streamText } from 'ai'
const result = streamText({ model: 'sakana/fugu-ultra', prompt: 'Why is the sky blue?'})Providers
Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.
| Provider |
|---|
 Sakana AI | 1M | 6.4s | $5.00/M | $30.00/M | Read: $0.5/M Write: — | — | — | +1 | 06/21/2026 |