Sakana: Fugu Ultra✓ Catalog verified
Fugu Ultra 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 route...
Overview
Fugu Ultra 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 route...
Access: available through the official Sakana API. Context window: 1M.
Specifications
| API identifier | sakana/fugu-ultra |
| Provider | Sakana |
| Model type | Multimodal LLM |
| Context window | 1M catalog |
| Input modalities | text · image |
| Output modalities | text |
| Released | Jun 24, 2026 |
| Moderated | No |
| Architecture modality | text+image->text |
API defaults
{
"top_k": null,
"top_p": null,
"temperature": null,
"presence_penalty": null,
"frequency_penalty": null,
"repetition_penalty": null
}Pricing
Live pricing components for sakana/fugu-ultra as published in the catalog.
| Pricing component | Raw unit price | Normalized | Unit |
|---|---|---|---|
| Prompt tokens | $0.000005 | $5.00 / 1M | Per input token |
| Completion tokens | $0.00003 | $30.00 / 1M | Per output token |
| Request fee | N/A | N/A | Per request |
| Image fee | N/A | N/A | Per image unit |
| Web search fee | $0.01 | $0.010000 | Per search request |
Cost calculator
Estimate monthly spend from your own token volumes.
Estimated Total Cost
$8.5Calculated from current list pricing in the ModelsAtlas catalog.Capabilities
| Capability | Status | What it means |
|---|---|---|
| Visual Understanding | ✓ Supported | Image and document analysis support |
| Audio Processing | Not advertised | Speech and voice aligned flows |
| Tool Calling | ✓ Supported | Supports tools / function calling |
| Self-Hosting | Not advertised | Deploy outside managed APIs |
Capability signals
Directional signals derived from model metadata and capability tags — not official benchmark submissions.
Quick start
Call Sakana: Fugu Ultra through an OpenAI-compatible client.
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="YOUR_API_KEY"
)
response = client.chat.completions.create(
model="sakana/fugu-ultra",
messages=[{"role": "user", "content": "Explain quantum physics."}]
)
print(response.choices[0].message.content)Alternatives
Closest models by context window from a different provider.
| Model | Provider | Context | Input /1M | Actions |
|---|---|---|---|---|
| Anthropic Claude Sonnet Latest | ~anthropic | 1M | $2.00 | View → |
| Anthropic: Claude Fable Latest | ~anthropic | 1M | $10.00 | View → |
Sources & attribution
Pricing and metadata are maintained in the ModelsAtlas catalog.
Frequently asked questions
How much does Sakana: Fugu Ultra cost?
$5.00 per 1M input tokens and $30.00 per 1M output tokens on the official Sakana API.
What is the context window of Sakana: Fugu Ultra?
Sakana: Fugu Ultra supports up to 1M tokens of context.
Does Sakana: Fugu Ultra support tool / function calling?
Yes, Sakana: Fugu Ultra supports tool / function calling — you can register tools and the model will emit structured tool calls.
How do I access Sakana: Fugu Ultra?
Use the official Sakana API with the model id `sakana/fugu-ultra`. See the Quick start section above for code examples.