Sakana AI

Fugu MaxSakana AI

Fugu Max is the cost-performance model in Sakana AI's Fugu family: the same learned multi-agent orchestration approach and 1M-token context window as Fugu Ultra, trading some peak reasoning depth for a much lower price per token.

Fugu UltraSakana AI

Fugu Ultra is the higher-performance model in Sakana AI's Fugu family. Rather than a standard monolithic language model, it is a learned multi-agent orchestration system: a model trained to route tasks across a swappable pool of underlying models and to recursively call instances of itself. It is optimized for complex, multi-step reasoning, coding, and agentic workflows, with orchestration tokens billed as standard input/output tokens.

Fugu Ultra v2Sakana AI

Fugu Ultra v2 is the successor to Fugu Ultra and the higher-performance model in Sakana AI's Fugu family: a learned multi-agent orchestration system that routes tasks across a swappable pool of underlying models and recursively calls instances of itself. Reasoning is always on, and it adds document (file) input alongside text and images.

Sakana NamazuSakana AI

Sakana Namazu is a Japanese-specialized reasoning model from Sakana AI, based on Kimi K2.6 with additional training for Japanese language and business contexts. It is suited for Japanese instruction following and business workflows, supports a 262K context window, and accepts text, image, and file inputs.