tools
Sakana Fugu
Sakana Fugu is an API that orchestrates multiple AI models to handle complex coding, research, reasoning, and security tasks.
Sakana Fugu coordinates specialized AI agents through one OpenAI-compatible API. It offers Fugu, Fugu Ultra, Fugu Max, and Fugu Cyber for different balances of latency, quality, cost, and cybersecurity focus.
It is used by developers, researchers, security teams, and enterprises for coding, code review, paper reproduction, research, vulnerability analysis, and agent workflows. Usage is paid through monthly subscriptions or token-based billing; Fugu Cyber requires access approval, and service is unavailable in the EU/EEA.
Features
- OpenAI-compatible API for Fugu, Fugu Ultra, Fugu Max, and Fugu Cyber
- Dynamically selects and coordinates specialized models for each task
- Supports coding, reasoning, research, and other multi-step workflows
- Lets users exclude selected providers or models from Fugu's pool
- Fugu Ultra coordinates a deeper agent pool for difficult reasoning tasks
- Fugu Max optimizes model selection for cost and performance
- Fugu Cyber focuses on security analysis, vulnerability research, and threat investigation
- Integrates with Codex CLI and Claude Code
Use cases
- Review code and identify bugs across large codebases
- Reproduce papers by implementing, training, and evaluating algorithms
- Investigate patents, literature, and other research materials
- Analyze vulnerabilities and conduct scoped security assessments
- Build chatbots and agent products through one model endpoint
- Run long-running coding, research, or reasoning workflows
Pros
Cons
Latest updates
- 【開催レポート】Sakana AIシンポジウム：Jürgen Schmidhuberが語るAIのこれまでとこれから、日本から挑む言語モデル・世界モデル・Physical AI
自社で事前学習する言語モデルシリーズ「Sakana Sawara（仮称）」を発表し、最初のモデル「Sawara Small（仮称）」を開発する。
- Sakana API Platform、エンタープライズ向けにアーリーアクセスプログラムを開始
Sakana API Platformのアーリーアクセスを開始し、Sakana Fuguを組織管理下でAPI利用できるようにした。
- オントロジーを基盤に、意思決定・実行を支援するAIエージェントプラットフォーム「Sakana Aquarium」
オントロジーを基盤に、組織の意思決定と実行を支援するAIエージェントプラットフォーム「Sakana Aquarium」を発表した。
- Sakana Chatが覚えていることを見てみよう：メモリを可視化する新機能「My Fish」
Sakana Chatに、メモリの内容や使用履歴、メモリ同士のつながりを確認できる「My Fish」を追加した。
- 医師向け検索ツール「Evidence Finder」にSakana Namazuを導入：日本仕様のAIを、医療の現場へ
医師向けエビデンス検索ツール「Evidence Finder」に、Sakana Namazuが導入された。
Capabilities
- Searches the web — “web_search and web_fetch are billed at $0.007 per call.” source
- Acts for you — “From one simple request, Sakana Fugu worked autonomously for nearly four hours — reading the paper, implementing, training, evaluating, and analyzing the gaps.” source
- Runs code — “the agent ran 123 experiments over ~14 hours on a single H100 GPU.” source
- Developer API — “Sakana Fugu is available through an OpenAI-compatible API.” source
Pricing
- Starting price
- $20/mo
- Prices checked
- 2026-10-25
Token Plan — Fugu Ultra
- $5 /1M tokens
- $10 when context > 272K
- $30 /1M tokens
- $45 when context > 272K
- $0.50 /1M tokens
- $1.00 when context > 272K
- Fixed pricing for fugu-ultra-v2.0
- Input
- Output
- Cached input
Token Plan — Fugu Max
- $2
- $6
- $0.25
- Fixed rates regardless of context length
- Input
- Output
- Cached input
Token Plan — Fugu Cyber
Price on request
- Contact our sales team for details on usage and pricing
Standard Plan
- $20 /month
- Lightweight daily usage
- Occasional API calls, small experiments, and personal workflows
- Baseline allowance
Pro Plan
- $100 /month
- Focused working sessions
- Regular coding, review, research, and analysis sessions
- 10× Standard Plan usage
Max Plan
- $200 /month
- Heavy long-running workloads
- For power users who keep Fugu active across deeper, longer-running tasks
- 20× Standard Plan usage