Fugu Ultra v1.1

fugu Reasoning Tool Calling Attachments Structured Output

Sakana AI's upgraded Fugu Ultra release with stronger coding, agentic task execution, and advanced reasoning through dynamic orchestration of frontier models.

Providers 2

Released Jun 15, 2026

Input Modalities text, image

Output Modalities text

Tarsk Use coding

Available Providers (2)

Provider	Model ID	Input Cost	Output Cost	Context	Max Output	Docs
EmpirioLabs AI	`fugu-ultra-v1-1`	$5/MTok	$30/MTok	1M	131.1K
NanoGPT	`sakana/fugu-ultra-v1.1`	$5.25/MTok	$31.50/MTok	1M	16.4K

Capabilities

Reasoning

Tool Calling

Attachments

Open Weights

Structured Output