Sakana AI has released Fugu Ultra v1.1, an update to its model router that distributes queries across a pool of publicly available top-tier models. The company claims performance gains of up to 7.9 points over v1.0, with the biggest improvements appearing on ProgramBench and TerminalBench 2.1. Fugu v1.1 reportedly beats Fable 5, even though Fable 5 is not part of the router’s selection pool. All of these numbers come from Sakana itself, and no independent verification exists yet.
Pricing remains at $5 per million input tokens and $30 per million output tokens. Sakana states it takes about two weeks of training and evaluation before a new top-tier model gets added to the pool. The architecture is described in the technical report. The update also adds a Claude Code-compatible endpoint for calling Fugu directly from the terminal. Since launch, Fugu has been available on platforms like OpenRouter and Vercel. The first Fugu version received a lukewarm reception. Critics pointed to high token usage, slow speed, and poor results. Sakana still does not serve the EU or EEA, citing GDPR and EU-specific regulations.
* Performance gains are self-reported by Sakana
* Fable 5 was excluded from the comparison pool
* Service remains unavailable for European customers
