Fugu Ultra v2
FrontierVisionToolsSakana · Released September 2026 · Knowledge cutoff August 2026
Fugu Ultra v2 is the higher-performance model in Sakana AI's Fugu family.
It comes from Sakana AI, a Tokyo lab researching nature-inspired model architectures, whose Fugu line orchestrates several models rather than serving one.
Facts and pricing
- Provider
- Sakana
- Context window
- 1M tokens
- Input price
- 60.0 credits / 1M tokens ($5.00 raw)
- Output price
- 360 credits / 1M tokens ($30.00 raw)
- Vision (image input)
- Yes
- Tool calling
- Yes
- Extended reasoning
- No
Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin. Raw prices shown per 1M tokens.
Try Fugu Ultra v2 now
What Fugu Ultra v2 is best for
- Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
- Very long documents and codebases: a 1M-token window fits entire books or repositories in one conversation
- Working with images: screenshots, charts, photos and scanned documents alongside text
- Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows
Example prompts
Prompts that suit a frontier model like Fugu Ultra v2:
- Review this business plan and give me the three hardest questions an investor would ask
- Rewrite this announcement so it lands with both engineers and executives
- I am choosing between two job offers, help me think through the tradeoffs
- Draft a technical design doc for a rate limiter, including failure modes
Sakana family
| Model | Context | Input cr/M | Output cr/M | Released |
|---|---|---|---|---|
| Fugu Ultra v2 | 1M | 60.0 | 360 | September 2026 |
| Fugu Max | 1M | 24.0 | 72.0 | September 2026 |
| Fugu Ultra | 1M | 60.0 | 360 | June 2026 |
Frequently asked questions
- What is Fugu Ultra v2?
- Fugu Ultra v2 is an AI model by Sakana. Fugu Ultra v2 is the higher-performance model in Sakana AI's Fugu family.
- How much does Fugu Ultra v2 cost on Zeplik?
- Input tokens cost 60.0 credits per million and output tokens 360 credits per million (1 credit = $0.10; the raw provider rates are $5.00 and $30.00 per million). New accounts start with free credits.
- How long can a conversation with Fugu Ultra v2 be?
- Fugu Ultra v2 has a 1M-token context window (1,000,000 tokens), which covers the conversation plus any documents you attach.
- Does Fugu Ultra v2 support images and tools?
- Fugu Ultra v2 accepts image input and supports tool calling.
Related models
Fugu Max is the cost-performance model in Sakana AI's Fugu family.
Fugu Ultra is the higher-performance model in Sakana AI's Fugu family.
Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use.
Nano Banana 2.1 (Gemini Nano Banana 2.1) is Google's image generation and editing model on the Flash tier, succeeding Nano Banana 2 and Nano Banana Pro.
Mistral Large 4 is a frontier multimodal (text and image input) model from Mistral AI built for reasoning, coding, and agentic workloads.
Ling 3.1 Flash is a hybrid reasoning mixture-of-experts model from inclusionAI, with 25B active parameters out of 560B total.
More you can do with Fugu Ultra v2
- 467 AI skillsReady-to-run expert methods for writing, data, code and more, each running on Fugu Ultra v2 or any model you pick.
- 997 integrationsConnect Gmail, Slack, GitHub, Notion and hundreds more so the assistant can work in your apps.
- Simple pricingPlus, Pro and Max plans with a monthly credit allowance that works across every model.