Sakana Fugu Ultra from Sakana AI is now available on AI Gateway.

Fugu Ultra is built on a pool of publicly accessible frontier models, rather than running as a single model. It coordinates several models, routing work to 1-3 agents depending on the problem and combining their results into a single answer.

Based on reasoning and scientific benchmarks, Fugu Ultra has capabilities similar to those of Claude Mythos Preview and Fable 5.

To use Fugu Ultra, set model to sakana/fugu-ultra in AI SDK:

import { streamText } from 'ai';
const result = streamText({
  model: 'sakana/fugu-ultra',
  prompt: 'Review this pull request and flag correctness bugs.',
});

AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in custom reporting, Zero Data Retention support, budgets for API keys, and more.

AI Gateway reflects provider pricing with no markup and does not charge a platform fee on inference, including on Bring Your Own Key (BYOK) requests.

Try Sakana Fugu Ultra in the model playground.