Fugu Ultra

Sakana · Released June 2026

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...

Facts and pricing

Provider

Sakana

Context window

1M tokens

Input price

55.0 credits / 1M tokens ($5.00 raw)

Output price

330 credits / 1M tokens ($30.00 raw)

Vision (image input)

Yes

Tool calling

Yes

Extended reasoning

No

Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.10x margin. Raw prices shown per 1M tokens.

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What Fugu Ultra is best for

• Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
• Very long documents and codebases: a 1M-token window fits entire books or repositories in one conversation
• Working with images: screenshots, charts, photos and scanned documents alongside text
• Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

Frequently asked questions

What is Fugu Ultra?

Fugu Ultra is an AI model by Sakana. 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...

How much does Fugu Ultra cost on Zeplik?

Input tokens cost 55.0 credits per million and output tokens 330 credits per million (1 credit = $0.10; the raw provider rates are $5.00 and $30.00 per million). New accounts start with free credits.

How long can a conversation with Fugu Ultra be?

Fugu Ultra has a 1M-token context window (1,000,000 tokens), which covers the conversation plus any documents you attach.

Does Fugu Ultra support images and tools?

Fugu Ultra accepts image input and supports tool calling.

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