Sakana AI: Fugu Max
Fugu Max is a reasoning model from Sakana AI released on Sep 11, 2026. It reads text and images and writes text, with a 1M token context window and up to 131K tokens per reply.
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It costs $2 per million input tokens and $6 per million output tokens. Cached input bills at $0.25, 88% less than fresh input.
It supports tool calling, structured JSON output and prompt caching.
8 providers serve it, including Vercel AI Gateway, DevPass (LLM Gateway) and EmpirioLabs AI.
- Modalities
- In / out price
- $2 / $6 per 1M
- Context
- 1M
- Max output
- 131K
- Released
- Sep 11, 2026
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Fugu Max pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $2 / 1M tokens | |
|---|---|---|
| Output | $6 / 1M tokens | |
| Cached input (read) | $0.25 / 1M tokens | 88% off input |
Fugu Max providers
8 providers serve it, including Vercel AI Gateway, DevPass (LLM Gateway) and EmpirioLabs AI. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Vercel AI Gateway | $2 | $6 | $0.25 | 1M | 1M |
| DevPass (LLM Gateway) | $2 | $6 | $0.25 | 1M | 1M |
| EmpirioLabs AI | $2 | $6 | $0.25 | 1M | 131K |
| Kilo Gateway | $2 | $6 | $0.25 | 1M | 128K |
| LLM Gateway | $2 | $6 | $0.25 | 1M | 1M |
| Merge Gateway | $2 | $6 | $0.25 | 1M | 128K |
| NanoGPT | $2 | $6 | $0.25 | 1M | 128K |
| AI/ML API | $2.75 | $8.25 | $0.3439 | 1M | 128K |
What Fugu Max costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Fugu Max through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Reasoning
reasoning
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Fugu Max questions
How much does the Fugu Max API cost?
$2 per million input tokens and $6 per million output tokens, with cached input at $0.25. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Fugu Max?
1,000,000 tokens of input, and it can write up to 131,072 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Fugu Max?
8 providers serve it, including Vercel AI Gateway, DevPass (LLM Gateway) and EmpirioLabs AI. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Fugu Max support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is Fugu Max open source?
No. Sakana AI serves it through an API only, so you cannot download the weights or host it yourself.
When was Fugu Max released?
Sep 11, 2026.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Fugu Max?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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