Fugu Ultra v2
- Price
- Paid
- API
- Yes
- Weights
- No
WHAT IT DOES
Fugu Ultra v2 is the high-capability sibling to Fugu Max, released alongside it September 11, 2026. Where Fugu Max optimizes for cost, Fugu Ultra v2 asks 'what is the absolute highest capability achievable on complex, multi-step tasks,' pricing at $5 per million input tokens and $30 per million output tokens at standard context lengths. Sakana reports Fugu Ultra v2 scored 48.3 on the Chartography benchmark against 27.3 for Anthropic's Claude Opus 5 and 29.5 for Claude Fable 5, without including either closed model anywhere in its orchestration pool.
WHY WE PICKED IT
The Chartography gap over Opus 5 and Fable 5, this site's own leaderboard leaders, is large enough to be worth flagging even though it's a single Sakana-run benchmark. It's a real signal that learned orchestration over open models can compete with frontier closed models on specific task types, not a general claim that it beats them everywhere.
QUICK FACTS
STRENGTHS
- ✓Scored 48.3 on Chartography against 27.3 for Opus 5 and 29.5 for Fable 5, by Sakana's own numbers
- ✓Achieves that gap without either closed model in its orchestration pool
- ✓Single API call, orchestration across a model pool handled server-side
- ✓Clear two-tier product line: Fugu Max for cost, Ultra v2 for capability
LIMITATIONS
- ⚠Chartography comparison against Opus 5 and Fable 5 is Sakana's own benchmark, not independently replicated
- ⚠Not a single model, so which models handle a given request can change over time
- ⚠No open weights, proprietary and API-only
- ⚠At $5/$30 per million tokens, materially pricier than Fugu Max for tasks that don't need the extra capability
GETTING STARTED
Sign up for API access at sakana.ai; Fugu Ultra v2 is called like a normal chat-completions endpoint, at $5 per million input and $30 per million output tokens for standard context lengths.
OFFICIAL LINKS
SIMILAR TOOLS
PRICING
Requires a paid subscription.
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EXPLORE ALTERNATIVES
Compare Fugu Ultra v2 with 5+ similar llms AI tools.
FREQUENTLY ASKED QUESTIONS
Is Fugu Ultra v2 free?
No, Fugu Ultra v2 requires a paid subscription.
Does Fugu Ultra v2 have an API?
Yes, Fugu Ultra v2 offers an API for programmatic integration.
What is Fugu Ultra v2 best for?
Fugu Ultra v2 is best for Complex Multi-Step Tasks via Orchestration. Fugu Ultra v2 is the high-capability sibling to Fugu Max, released alongside it September 11, 2026. The Chartography gap over Opus 5 and Fable 5, this site's own leaderboard leaders, is large enough to be worth flagging even though it's a single Sakana-run benchmark. It's a real signal that learned orchestration over open models can compete with frontier closed models on specific task types, not a general claim that it beats them everywhere.
What platforms does Fugu Ultra v2 support?
Fugu Ultra v2 supports api.
Is Fugu Ultra v2 open source?
No, Fugu Ultra v2 is not open source.
How do I get started with Fugu Ultra v2?
Sign up for API access at sakana.ai; Fugu Ultra v2 is called like a normal chat-completions endpoint, at $5 per million input and $30 per million output tokens for standard context lengths.
How do I use Fugu Ultra v2?
Fugu Ultra v2 is a large language model for text generation, analysis, and conversation. Use the API for programmatic access. Enter prompts or questions to get responses. It excels at scored 48.3 on chartography against 27.3 for opus 5 and 29.5 for fable 5, by sakana's own numbers.
FEATURED ON CURATEDAI
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