Antimatter
Sakana

Fugu Ultra v2

sakana/fugu-ultra-v2

Fugu Ultra v2 is the higher-performance model in Sakana AI's Fugu family.

$5.50 in · $33.00 out per 1M tokens1M contextSep 11, 2026

about 1.9¢ a message

A typical message: about 500 tokens you send and 500 it writes.

Chat with Fugu Ultra v2
Call it from codeLock this price

Spec sheet

Published facts from the catalog, billed prices and what we measured here. Anything not measured says so.

Price, billed here

Input, per 1M tokens
$5.50provider $5.00
Output, per 1M tokens
$33.00provider $30.00
Cached input, per 1M
$0.55provider $0.50
Margin
+10%

Context and formats

Context window
1,000,000 tokens
Longest answer
128,000 tokens
Reads
text, images, and files
Makes
text
First listed
2026-09-11

Measured here, last 7 days

First token, median
not measured
Answered without error
not measured

Tools and JSON

Tool calling
declaredthe provider's claim, not yet measured here
JSON output
declaredthe provider's claim, not yet measured here

Price and latency history as JSON: GET /api/planet/history?id=sakana/fugu-ultra-v2.

About

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...

In Sakana's words.

Try it here

The answer appears here.

Measured here

Call it

Use one OpenAI compatible endpoint, this model's id and an am_live_ key from the dashboard. You can also try it in chat first with no key.

curl https://useantimatter.com/v1/chat/completions \
  -H "Authorization: Bearer $ANTIMATTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "sakana/fugu-ultra-v2", "messages": [{"role": "user", "content": "Hello"}]}'

Everything else is in the docs.

Embed this

A badge showing this model's live price per million tokens, as billed here, for a README or a site. It links back to this page.

Fugu Ultra v2 price on Antimatter
<a href="https://useantimatter.com/planet/sakana/fugu-ultra-v2"><img src="https://useantimatter.com/api/badge/price?id=sakana%2Ffugu-ultra-v2" alt="Fugu Ultra v2 price on Antimatter" height="28"></a>

More from Sakana

Similar models from other labs

Closest in price and memory, from other labs.

Go back to the map, or take this model into a chat.