Fugu Ultra

Sakana AI has released Fugu Ultra v1.1, an update to its multi-model router, claiming performance gains up to 7.9 points over v1.0 and results that beat Anthropic's Fable 5 despite Fable 5 not being part of the router's model pool. All benchmark figures come from Sakana itself and remain unverified.

Sakana AI has released Fugu Ultra, a multi-agent orchestration system that routes tasks across pools of underlying models rather than operating as a single monolithic model. The system supports a 1M token context window and is priced at $5 per million input tokens and $30 per million output tokens.