Sakana Fugu Max and Fugu Ultra v2
Sakana AI · · Product launch
Sakana AI launched Fugu Max and Fugu Ultra v2, an orchestration layer served through an OpenAI-compatible API that routes each task to the leanest model able to handle it, drawing on a pool of open-weights and specialised models including NVIDIA's Nemotron family. Sakana states the two are not separate products but two axes of one strategy: Max pushes cost efficiency, Ultra v2 pushes maximum capability.
Why it matters
Recorded as a milestone rather than a model because it orchestrates models rather than being one. Sakana calls Max and Ultra v2 models available through its API, but the post describes them routing work across a pool of other models — so a model record would carry a null parameter count, a null context window and a null licence, which is the shape that put ChatGPT and Bard here rather than in the release dataset.
This is LLM World's historical reading, not a claim by Sakana AI. The facts above and the sources below are what it rests on.
Sources
Record status: verified · confidence 80/100
Sakana AI's own release post, which prints "September 11, 2026" beside the headline.