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Sakana AI · Released Jun 15, 2026

Fugu

Multi-agent model for routing expert agents across complex analytical tasks.

  • Proprietary
  • Reasoning
  • Tool calling
  • Vision
Capability
—No ECI score yet
Input
—No listed price
Output
—No listed price
Context
1Mtokens
Pricing

What it costs

No per-token price is published for this model yet.

No per-token price is listed for this model on models.dev.

Capability

Independent benchmarks

Epoch AI has not published a Capabilities Index score for Fugu yet.

Specifications

The details

Lab
Sakana AI
Released
Jun 15, 2026
Context window
1,000,000 tokens
Inputs
Text, Images
Output
Text
Reasoning
Adjustable effort high · xhigh
Tool calling
Yes
Structured output
Yes
Weights
Proprietary
API model ID
fuguon Sakana AI
Availability
1 API providerlisted on models.dev

Sakana AI model documentation

Lab-reported

What Sakana AI claims

Published by the lab at launch. Settings vary, so compare these only with care.

BenchmarkScoreSettingSource
SWE Bench Pro59—Source
Terminal Bench 2.180.2—Source
LiveCodeBench92.9—Source
LiveCodeBench Pro87.8—Source
Humanity’s Last Exam47.2—Source
CharXiv Reasoning85.1—Source
GPQA Diamond95.5—Source
SciCode60.1—Source
τ3 Banking21.7—Source
Long Context Reasoning74.7—Source
MRCRv286.6—Source
CTI-REALM67.5—Source
Same lab

More from Sakana AI

Questions

About Fugu

How much does Fugu cost?

Fugu has no published per-token API price on models.dev yet.

What is the context window of Fugu?

Fugu accepts up to 1,000,000 tokens per request.

How good is Fugu?

Epoch AI has not published a Capabilities Index score for Fugu yet.

Is Fugu open source?

No. Fugu is proprietary; you use it through Sakana AI’s API or partner platforms.

What inputs does Fugu support?

Fugu accepts text and images and replies in text. It is a reasoning model with high and xhigh effort settings, supports tool calling and can return structured JSON output.

When was Fugu released?

Sakana AI released Fugu on Jun 15, 2026.

What are the best alternatives to Fugu?

The closest current models from other labs on capability, price and release date are Kimi K2.7 Code Highspeed (Moonshot AI, $1.90 / $8.00), Claude Mythos 5 (Anthropic, $10.00 / $50.00), North Mini Code (Cohere, Free / Free) and DiffusionGemma 26B A4B IT (Google).