Fugu Ultra
Fugu Ultra is the higher-performance model in Sakana AI's Fugu family.
Model by Sakana
Install
Pick your client. Read the repository before you give any tool access to your data.
{
"model": "sakana/fugu-ultra",
"baseURL": "https://openrouter.ai/api/v1"
}OpenAI-compatible API: point any OpenAI SDK at the base URL and use this model id.
Settings it needs
OPENROUTER_API_KEYrequiredsecret
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About
Use cases: model-inference, agent-orchestration
Reviews
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Price and limits
| Variant | Input $/M tokens | Output $/M tokens | Cached input $/M |
|---|---|---|---|
| Standard | $5 | $30 | $0.5 |
Price as of Oct 26, 2026 from OpenRouter. Prices change often; check before you rely on one.
- Provider
- Sakana
- Model id
sakana/fugu-ultra- Context window
- 1,000,000 tokens (1M)
- Max output
- 128,000 tokens
- Input
- text, image
- Output
- text
- Tool calling
- Yes
- Structured outputs
- Yes
- Reasoning
- Yes
- Weights
- Closed
- Released
- Jun 24, 2026
Details
- Auth
- API key
- License
- Proprietary
- First seen
- Oct 24, 2026
- Last checked
- Oct 26, 2026
- Source
- OpenRouter
More from Sakana
- 0.582score
Fugu Ultra v2
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Fugu Ultra v2 is the higher-performance model in Sakana AI's Fugu family.
ModelAFreshness: A$5 / $301M ctx - 0.582score
Fugu Max
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Fugu Max is the cost-performance model in Sakana AI's Fugu family.
ModelAFreshness: A$2 / $61M ctx - 0.582score
Sakana Namazu
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Sakana Namazu is a Japanese-specialized reasoning model from Sakana AI, based on Kimi K2.6 with additional training for Japanese language and business contexts.
ModelAFreshness: A$0.95 / $4262K ctx
Cite this page
Fugu Ultra: price, context window, tool use. Agent Mart. https://agentmart.dev/models/sakana-fugu-ultra (last updated 2026-10-26)