Fugu Ultra v2 — RProuter

Input price: per 1M tokens
Output price: per 1M tokens
Context: 272K128K max output
Cost / request: 8K in · 500 out

01Routes and pricingLoading

02Capabilities

Input: text
Output: text
Context: 272K
Max output: 128K

ReasoningTool callingStructured outputWeb search

03Quick start

Call it with your RProuter key

Any OpenAI-compatible SDK works. Point it at the RProuter base URL from your API keys page and use this model ID.

Quick start guide Create an API key

Catalog source: openrouter.ai · checked 2026-09-16

const response = await client.chat.completions.create({
  model: "sakana/fugu-ultra-v2",
  messages: [{ role: "user", content: "A story begins…" }],
  max_tokens: 500,
  stream: true,
});

for await (const chunk of response) {
  process.stdout.write(chunk.choices[0]?.delta?.content ?? "");
}