AI Model Atlas / Sakana
Fugu Ultra v2
One million input tokens cost $5.00 and one million output tokens $30.00. Context window: 1M tokens, about 1,667 A4 pages.
What it costs in practice
Pricing per million tokens doesn't mean anything to anyone, so I convert it to three tasks that people actually give to models. The usage assumptions are listed for each row so you can verify them.
| Task | Input | Output | Cost |
|---|---|---|---|
| 1500-word articlebrief plus finished text in English | 1,500 tokens | 2,200 tokens | $0.07 |
| 100 chat queries700 tokens per question and 400 per answer | 70,000 tokens | 40,000 tokens | $1.55 |
| Hour of work with an agentagent reads repository and writes fixes | 250,000 tokens | 30,000 tokens | $2.15 |
Technical details
| Provider | Sakana |
| Modalities | text + image + files → text |
| Context window | 1M tokens (~1,667 A4 pages) |
| Maximum response | 128k tokens |
| Step-by-step reasoning | yes |
| Tool calling | yes |
| Forced JSON format | no |
| Knowledge cutoff | 2026-08-28 |
| Cache read | $0.50 per million |
| Content moderation | no extra filter |
How it compares to the rest
The database contains 469 models. In terms of input pricing Fugu Ultra v2 is more expensive than 92 percent of paid models. A longer context window is available in 146 models.
Input price history
2026-09-11 · $5.002026-11-11 · $5.00
The chart shows the price of a million input tokens on consecutive measurement days. History starts on the day I launched the atlas and grows with each day. I don't backfill data.
Alternatives at a similar price
Models from other providers whose cost for the same article comes out closest.
| Model | Input / M | Output / M | 1500-word article | Context |
|---|---|---|---|---|
| GPT Chat LatestOpenAI | $5.00 | $30.00 | $0.07 | 400k |
| GPT-5.5OpenAI | $5.00 | $30.00 | $0.07 | 1.1M |
| GPT-6 Astra (batch)OpenAI | $5.00 | $25.00 | $0.06 | 1.1M |
| GPT-6 Astra Pro (batch)OpenAI | $5.00 | $25.00 | $0.06 | 1.1M |
Compare Fugu Ultra v2 with another model or go back to the full database 469 models.