Fugu Ultra

sakana/fugu-ultra

Fugu Ultra is the higher-performance model in Sakana AI's Fugu family.

InputImageText
OutputText
Input / Outputclub$5.3 / $31.8per 1M tokens · USD
Context window1Mtoken
Maximum output128Ktoken

Pricing

Current model usage rates. Choose your plan to see its published prices.

Pricing
UsagePricing
InputUS$5.3/ 1M token
InputInput length ≥ 272,001 tokensUS$10.6/ 1M token
Cache readUS$0.53/ 1M token
Cache readInput length ≥ 272,001 tokensUS$1.06/ 1M token
OutputUS$31.8/ 1M token
OutputInput length ≥ 272,001 tokensUS$47.7/ 1M token

Membership and model usage are billed separately. Compare plans

Capabilities

Input
ImageText
Output
Text
Context window
1,000,000 token
Maximum output
128,000 token
Reasoning
max · xhigh · high

Providers

Model supply available through Vecbase.

Via OpenRouter

Access is subject to your account’s permissions and model availability.

Frequently asked questions

What is Fugu Ultra, and who develops it?

Fugu Ultra is a model from sakana. Its model ID on Vecbase is sakana/fugu-ultra. Fugu Ultra is the higher-performance model in Sakana AI's Fugu family.

How much does Fugu Ultra cost on Vecbase?

For Fugu Ultra, the Club plan lists USD 5.3 per 1 million input tokens and USD 31.8 per 1 million output tokens, as of 10/22/2026, 6:56:08 PM UTC. See the pricing table for cache rates, input-length tiers and other usage types. Membership fees are separate.

How many tokens fit in Fugu Ultra’s context window?

Fugu Ultra has a context window of 1,000,000 tokens. Input and output must fit within the limits of the API you use.

What is the maximum output length for Fugu Ultra?

Fugu Ultra can generate up to 128,000 tokens per response. Your API or request settings may set a lower limit.

Can Fugu Ultra call tools in an agent workflow?

Yes. Fugu Ultra supports tool calling. Your application provides the tool definitions and runs the tools the model requests.

Does Fugu Ultra support structured outputs?

Yes. Fugu Ultra supports structured output. Set the required format in your API request and check the returned data before using it.

Which input and output formats does Fugu Ultra support?

Fugu Ultra accepts Image and Text and produces Text.

Which providers make Fugu Ultra available through Vecbase?

Vecbase offers Fugu Ultra through OpenRouter. Availability may vary by provider.

Which model ID should an agent use to request Fugu Ultra?

Use sakana/fugu-ultra as the model identifier for Fugu Ultra. See Vecbase’s API documentation for authentication, required inputs and supported request formats.

Which reasoning settings are listed for Fugu Ultra?

Fugu Ultra supports these reasoning levels: max, xhigh, and high. Available options depend on your API.

What does an agent need to access Fugu Ultra through Vecbase?

To use Fugu Ultra, you need an authenticated account with the required permissions, sufficient balance and the relevant capability enabled. See the documentation for setup.

Is a release date available for Fugu Ultra?

We do not yet have a confirmed release date for Fugu Ultra.

Which models can I compare with Fugu Ultra on Vecbase?

You can compare Fugu Ultra with Fugu Max (sakana/fugu-max), Fugu Ultra v2 (sakana/fugu-ultra-v2), and Sakana Namazu (sakana/sakana-namazu). Check their capabilities and prices to find the best fit for your task.