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Fugu Ultra

Sakana · released 2 months ago

Fugu Ultra is a Sakana model with a 1M token context window — about 1,400 pages of text. It reads Text and Images and replies in Text. It can show its reasoning before it answers.

$5.75

input / 1M tokens

$34.50

output / 1M tokens

1M

context — about 1,400 pages

$0.06

a client proposal

Pricing

Input
$5.75 per million tokens
Output
$34.50 per million tokens
Cached input
$0.575 per million tokens
Web search
1.1¢ per search
Long-context rate (over 272K)
$11.50 in · $51.75 out, per million tokens

Billed from your Alyph wallet. Prices can change when the provider changes theirs — last checked August 9, 2026.

The numbers

Provider
Sakana
Released
2 months ago (2026-06-24)
Context window
1M tokens — about 1,400 pages
Max output
128K tokens per reply
Input
Text and Images
Output
Text
Reasoning
Shows its thinking before answering

Cost vs Token Amount

Drag the slider to adjust the split between input and output workload.

80% Input20% Output
free$9.77$19.550 tokens250k500k750k1000k
Fugu Ultra

Adjust the ratio slider to change how output tokens influence the final price for equivalent workloads.

What a task costs

2K tokens in · 500 tokens out.

Fugu Ultra

Sakana

2.9¢

for this task

40% input · 60% output

Full pricing →

Your $5 welcome credit covers about 173 of these.

Compare Fugu Ultra

Closest in price on a typical task:

Fugu Ultra vs GPT Chat Latest →Fugu Ultra vs GPT-5.5 →Fugu Ultra vs GPT-5.6 Sol →Fugu Ultra vs GPT-5.6 Sol Pro →Any other combination →

Questions, answered

How much does Fugu Ultra cost on Alyph?

Fugu Ultra costs $5.75 per million input tokens and $34.50 per million output tokens on Alyph. A typical task — 5K tokens in, 800 out — works out to about $0.06. Billed from your Alyph wallet, with hard spending limits. Prices can change when the provider changes theirs; this page was last checked on August 9, 2026.

What is Fugu Ultra's context window?

1M tokens — about 1,400 pages. Replies can be up to 128K tokens long. Prompts longer than 272K tokens are billed at the long-context rate.

Can Fugu Ultra read images and files?

Fugu Ultra reads Text and Images. Drop a file onto the canvas and it becomes part of the context — the only limit is the context window.

Does Fugu Ultra show its reasoning?

Yes. Fugu Ultra can expose its thinking before the final answer, so you can watch how it got there.

Test Fugu Ultra against GPT Chat Latest

One prompt, both models at the same time, the better answer wins. Free to start, with $5 of credit.

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