Sakana Chat

Sakana Chat

Sakana Chat is an AI chat application from Sakana AI that lets users converse with the Fugu model orchestrator and the Namazu Japanese-language LLM.

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Last Updated Oct 21, 2026
Sakana Chat screenshot

About

Sakana Chat is the AI chat product from Sakana AI, a Tokyo-based company that builds foundation models using nature-inspired methods. It serves as the place where users can try Sakana AI's models conversationally, including Sakana Fugu, which orchestrates multiple large language models, and Sakana Namazu, the company's Japanese-specialized LLM.

Within Sakana AI's product lineup, Sakana Chat functions as the access point for two of its core models. Fugu routes each step of a task to a suitable model, aiming for a favorable balance of cost and performance, and continues working even if one underlying model becomes unavailable. Namazu is positioned as a strong option for Japanese text, with web search and code execution built in. Sakana AI also offers Sakana Marlin, an autonomous research agent, and Sakana Translate, a separate translation and proofreading tool built on Namazu, and the company works with major Japanese financial institutions and government bodies.

Key Features

Chat with Sakana Fugu: Users can interact with Fugu, a model that orchestrates multiple frontier LLMs to handle varied, complex tasks, including agentic workflows.
Chat with Sakana Namazu: The app provides access to Namazu, Sakana AI's Japanese-focused LLM, which includes web search and code execution capabilities.
Model orchestration: Fugu is designed to push the cost-versus-performance frontier by selecting suitable models for each step of a task.
Resilience: Fugu is built to keep running even when one of the underlying closed models becomes unavailable.
Japanese language strength: Namazu is described by the vendor as a top LLM for Japanese at a reasonable price, making the app relevant for Japanese-language work.
Agentic chatbot support: Fugu's design targets the varied task types that agentic chatbots encounter, which Sakana AI describes as its strength.

Pricing & Fees

  • Pricing: Not publicly listed on the pages we reviewed; check the official site for current plans.
  • Access: Sakana Chat is offered through Sakana AI's official site as the way to try Fugu and Namazu directly.
  • Company background: Sakana AI is based in Tokyo and publishes research at venues including ICLR, NeurIPS, ICML, and Nature.
  • Related products: Sakana Translate, a separate tool for translating and proofreading Japanese, English, and Chinese, is built on the same Namazu model.

Who It's For

Sakana Chat is aimed at users who want to converse with Sakana AI's models rather than deploy them through an API. That includes professionals working in Japanese and English, analysts evaluating Japanese-language LLM performance, and developers or researchers curious about multi-model orchestration. It is also a practical starting point for enterprise teams in finance or the public sector that already work with Sakana AI's applied solutions and want to test the underlying models in a chat setting.

FAQ

What is Sakana Chat?Sakana Chat is an AI chat application from Sakana AI that lets users converse with the company's Fugu model orchestrator and its Japanese-specialized Namazu LLM.

Is Sakana Chat free?Pricing is not publicly listed on the pages we reviewed, so users should check the official Sakana AI site for current plans and availability.

What models power Sakana Chat?The app features Sakana Fugu, which orchestrates multiple frontier LLMs, and Sakana Namazu, a Japanese-focused model with built-in web search and code execution.

Can Sakana Chat translate between Japanese and English?The chat app itself is a general conversational interface; dedicated translation and proofreading across Japanese, English, and Chinese is handled by Sakana AI's separate product, Sakana Translate.

Who makes Sakana Chat?Sakana Chat is developed by Sakana AI, a Tokyo-based company whose research on evolution and self-improving systems has appeared at ICLR, NeurIPS, and in Nature.