Fugu Ultra 2 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 multi-agent orchestration model from Sakana AI's Fugu family, using a trained language model to route tasks across coordinated agents.
Specifications
Canonical IDsakana-fugu-2-ultra
TypeLanguage
StatusActive
CreatorSakana
Providers
Context Window1.0M tokens
Max Output128K tokens
Input ModalitiesImagePDFText
Output ModalitiesText
Reasoning Effortsdefault
Release Date · 1 month ago
Knowledge Cutoff · 2 months ago

Capabilities

Input3/5
Text✓
Image✓
Audio·
Video·
PDF✓
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities6/13
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-v2
$5.00$30.00$0.5$0.010
Vercel AI Gateway logo
Vercel AI Gateway
sakana/fugu-ultra-v2
$5.00$30.00$0.5N/A

Cost Calculator

US Dollar ($)
Preset:

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Fugu Ultra 21.0M$5.00$30.00Current
Fugu Ultra1.0M$5.00$30.00Available

Other Models

ModelTierReleasedContextInput / 1MOutput / 1M
Fugu MaxMax1.0M$2.00$6.00

Model IDs

openrouter/sakana/fugu-ultra-v2
sakana-fugu-2-ultra
sakana/fugu-ultra-v2