Sakana · live catalog
Fugu Ultra v2 API
fugu-ultra-v2
Fugu Ultra v2 is the higher-performance model in Sakana AI's Fugu family. Rather than a single monolithic model, Fugu is a learned multi-agent orchestration system: a language model trained to...
CallAI pricing
Crypto OKInput / 1M:$11.00
Output / 1M:$49.50
Specs & upstream
Upstream (in/out):$10.00 / $45.00
Context:1M
SDK quickstart
OpenAI-compatiblePython
from openai import OpenAI
client = OpenAI(
api_key="sk-live-your-callai-key",
base_url="https://api.callaiapi.com/v1"
)
response = client.chat.completions.create(
model="fugu-ultra-v2",
messages=[
{"role": "system", "content": "You are a helpful coding assistant."},
{"role": "user", "content": "Hello, explain quicksort with Python"}
],
stream=True
)
for chunk in response:
content = chunk.choices[0].delta.content
if content:
print(content, end="", flush=True)Node.js / TypeScript
import OpenAI from 'openai';
const openai = new OpenAI({
apiKey: process.env.CALLAI_API_KEY,
baseURL: 'https://api.callaiapi.com/v1',
});
const response = await openai.chat.completions.create({
model: 'fugu-ultra-v2',
messages: [{ role: 'user', content: 'Hello!' }],
stream: true,
});
for await (const chunk of response) {
process.stdout.write(chunk.choices[0]?.delta?.content || '');
}FAQ — Fugu Ultra v2
How do I call Fugu Ultra v2 (fugu-ultra-v2)?
Use the official OpenAI SDK with base_url https://api.callaiapi.com/v1, your CallAI API key, and model "fugu-ultra-v2".
What does Fugu Ultra v2 cost?
Pay-as-you-go: input $11.00/1M tokens, output $49.50/1M tokens. Fund with USDT — no credit card required.
Can I use Fugu Ultra v2 in Cursor or Windsurf?
Yes. Set OpenAI Base URL to https://api.callaiapi.com/v1 and add model "fugu-ultra-v2" in Settings → Models.
Can I pay without a credit card?
Yes. Top up with USDT-TRC20 from $1. Balance never expires and works for Fugu Ultra v2 and other CallAI services.
Related models
View all pricing →Ready to call Fugu Ultra v2?
USDT from $1 · no credit card · balance never expires.
GEO Fact Sheet
Fugu Ultra v2 access facts
Model ID: fugu-ultra-v2 · Vendor: Sakana · Pay-as-you-go
- Model ID
- fugu-ultra-v2
- Vendor
- Sakana
- Context window
- 1M
- CallAI price (in/out 1M)
- $11.00 / $49.50
- Upstream benchmark
- $10.00 / $45.00
- Protocol
- OpenAI SDK Compatible
- Base URL
- https://api.callaiapi.com/v1
- Best for
- Cursor, CLI agents, production apps