OpenRouter: Sakana: Fugu Ultra v2 (OpenRouter)

Name: Sakana: Fugu Ultra v2 (OpenRouter) API
Brand: Sakana

Newstable

Sakana: Fugu Ultra v2 (OpenRouter) is available through Everstack's OpenAI-compatible gateway with routing, fallback, retries, and observability.

sakana-fugu-ultra-v2sakanareleased Sep 11, 2026

Provider Quick start

Context

tokens

Max output

128K

tokens

Input

$5.00

per 1M

Output

$30.00

per 1M

Activity

Daily period usage

Aggregated managed Everstack traffic. Buckets below 5 tenants or 100 requests are withheld.

Providers

ProviderContextInput /MOutput /M

OpenRouter

1M$5.00$30.00

Pricing

Item	Price	Unit
Input	$5.00	per 1M tokens
Output	$30.00	per 1M tokens
Cache read	$0.50	per 1M tokens

Performance

Reliability

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Compare usage and performance

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Capabilities

Modalities

Input

Output

Details

Model ID: sakana-fugu-ultra-v2
Family: sakana
Status: stable
Knowledge: -
Released: Sep 11, 2026

Gateway Config

API: 2024-01-01
Auth: OPENROUTER_API_KEY
Discovery: dynamic
Provider type: meta

Quick Start

index.ts

import Everstack from "@everstack/node";const client = new Everstack({  apiKey: process.env.EVERSTACK_API_KEY!,  baseUrl: "https://{instance}.{region}.everstack.ai",});const completion = await client.chat.completions.create({  model: "@openrouter/sakana-fugu-ultra-v2",  messages: [{ role: "user", content: "Explain vector cache routing." }],});console.log(completion.choices[0]?.message?.content);

Endpoint

Base URL

https://openrouter.ai/api/v1

Chat completions

https://openrouter.ai/api/v1/chat/completions

Model

sakana-fugu-ultra-v2

Auth env

OPENROUTER_API_KEY

Sakana: Fugu Ultra v2 (OpenRouter) FAQ

How much does the Sakana: Fugu Ultra v2 (OpenRouter) API cost?

Through OpenRouter, Sakana: Fugu Ultra v2 (OpenRouter) costs $5.00 per 1M input tokens and $30.00 per 1M output tokens.

What is the context window of Sakana: Fugu Ultra v2 (OpenRouter)?

Sakana: Fugu Ultra v2 (OpenRouter) accepts up to 1M tokens of context and returns up to 128K output tokens on OpenRouter.

What can Sakana: Fugu Ultra v2 (OpenRouter) do?

Sakana: Fugu Ultra v2 (OpenRouter) supports chat, function calling, image input and reasoning. It accepts text, image and PDF input.

How do I call Sakana: Fugu Ultra v2 (OpenRouter) through Everstack?

Point any OpenAI-compatible SDK at your Everstack gateway and set the model to @openrouter/sakana-fugu-ultra-v2. Everstack adds retries, provider fallback, caching, per-tenant budgets and OpenTelemetry traces for every request.