Sakana: Fugu Ultra v2

Fugu Ultra v2 is the higher-performance model in Sakana AI's Fugu family.

Context
1M
Max output
128K
Input price
$5/1M tokens
Output price
$30/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode

Details

Model IDsakana/fugu-ultra-v2
Provider OpenRouter
Creator sakana
Family—
License—
Status—
Type—
Input modalitiestext, image
Output modalitiestext
Open weight—
Parameters—
Architecture—
Context window1M tokens
Max input—
Max output128K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Pricing

Input
$5
Output
$30
Cache write
—
Cache read
$0.5
Batch in
—
Batch out
—

API

GET/v1/models/openrouter/sakana/fugu-ultra-v2

Sakana: Fugu Ultra v2

sakana/fugu-ultra-v2

Fugu Ultra v2 is the higher-performance model in Sakana AI's Fugu family.

Changes · 2 entries
sakana/fugu-ultra-v2createca7a400Nov 2, 2026, 03:02 AM
sakana/fugu-ultra-v2create17bcfbfSep 11, 2026, 06:36 AM