Inside Sakana Fugu Ultra: We Reverse Engineered Its Multi Agent Architecture

Fugu Ultra is not a single model. It is a multi-agent conductor that routes queries to a pool of frontier models, dispatching to 1 to 3 agents depending on complexity and combining their outputs into one response. We ran 20+ tests through the Requesty router and the Sakana API to map its architecture, token economics, and orchestration patterns.