Sakana Chat Adds Fugu Model and Code Execution for Login-Free Vibe Coding
Sakana AI announced a major update to Sakana Chat, its free and login-free chat product, adding the new Fugu orchestration model, upgrading its Japanese LLM Namazu to a new generation, and introducing long-awaited code execution. Users simply describe what they want in natural language, and the AI writes and runs code in the browser to generate web apps within seconds. It marks a consumer-facing deployment of multi-model orchestration combined with code execution, sharply lowering the barrier to app development.
Confirmed
- Free and open: Sakana Chat is free, requires no login, and works on mobile.
- Fugu model: described by the company as an orchestration model that dynamically combines multiple AI models to handle tasks; performance is said to rival frontier models, with strength in complex, multi-step instructions. Previously API-only, it is now live in the web chat interface.
- Namazu upgrade: the existing Japanese LLM Sakana Namazu has been upgraded to a new generation.
- Code execution: the model can autonomously execute code in an isolated environment, centered on a Japanese "vibe coding" experience, with support for file generation, games, and data analysis.
- Official demo: co-founder hardmaru showcased four app types generatable in 60 seconds, including an interactive math game for children and a report with complete analysis; official examples also include a kanji practice booklet and a goldfish-scooping mini-game.
Why it matters
- Anyone can build web apps from natural-language prompts without coding skills or a login step, greatly lowering the development barrier.
- Fugu moving from API to a free web product is a notable consumer deployment of the model-orchestration approach, worth watching for its influence on app-generation products.
2026-08-13 ~ 2026-08-14 · 11 related posts
Primary sources
- Sakana AI Updates Chat with New Fugu Model and Code Execution — SakanaAILabs · 2026-08-13
- Sakana Chat Major Update: New Models Namazu and Fugu Power Japanese Vibe Coding — SakanaAILabs · 2026-08-13
- Sakana AI Launches 'Fugu' Multi-Model System, Updates Free Chat Service — hardmaru · 2026-08-13
- Sakana Chat Major Update: Generate Web Apps via Code Execution, No Login Required — graceisford · 2026-08-13
- [source] Sakana Chat Demonstrates Vibe-Coding: Games and Reports in 60 Seconds — hardmaru · 2026-08-13
- Sakana AI's Fugu Model Orchestrator Launches Web Chat for Mobile Vibe Coding — hardmaru · 2026-08-14
- Sakana Chat Major Upgrade: Generate Web Apps via Vibe Coding Without Login — hardmaru · 2026-08-14
- Sakana Chat Update: Adds Fugu Model, Supports Auto-Generating Docs and Games — hardmaru · 2026-08-14
3 near-duplicate retellings: SakanaAILabs · hardmaru · SakanaAILabs