Fugu Ultra is Sakana's language model with a 1.0M context window and up to 128K output tokens, available from 2 providers, starting at $5.00 / 1M input and $30.00 / 1M output. A high-performance agentic reasoning system that orchestrates a deep pool of expert agents to maximize answer quality on complex, high-stakes problems.
Specifications
Canonical IDsakana-fugu-ultra
TypeLanguage
StatusActive
CreatorSakana
Providers
Context Window1.0M tokens
Max Output128K tokens
Input ModalitiesImageText
Output ModalitiesText
Reasoning Effortsdefault
Release Date · today

Capabilities

Input2/5
Text
Image
Audio·
Video·
PDF·
Output1/5
Text
Image·
Audio·
Video·
Embedding·
Capabilities5/13
Reasoning
Adaptive Reasoning·
Function Calling
Parallel Function Calling·
Structured Outputs
Native JSON Schema
Web Search
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·

Pricing by Provider

US Dollar ($)
Per 1M tokens
ProviderStandard
Input
$ / 1M
Output
$ / 1M
Cache Read
$ / 1M
Web Search
$ / request
OpenRouter logo
OpenRouter
sakana/fugu-ultra
$5.00$30.00$0.5$0.010
Vercel AI Gateway logo
Vercel AI Gateway
sakana/fugu-ultra
$5.00$30.00$0.5N/A

Cost Calculator

US Dollar ($)
Preset:

Model IDs

sakana-fugu-ultra
sakana/fugu-ultra