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Sakana AI

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?'
})
OverviewAboutProvidersLatencyUptimeStatusFAQ

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
Context
Latency
Throughput
Input
Output
Cache
Web Search
Per Query
Capabilities
ZDR
No Training
Release Date
Sakana AI
Legal:Terms
•
Privacy
1M
8.7s
$5.00/M
$30.00/M
Read:
$0.5/M
Write:
—
——
+1
06/21/2026