# Sakana Fugu Ultra now available on AI Gateway

**Published:** June 22, 2026 | **Authors:** Rohan Taneja, Jerilyn Zheng

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Sakana Fugu Ultra from Sakana AI is now available on [AI Gateway](https://vercel.com/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](https://ai-sdk.dev/):

```typescript
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](https://vercel.com/changelog/custom-reporting-ai-gateway), [Zero Data Retention support](https://vercel.com/blog/zdr-on-ai-gateway), [budgets for API keys](https://vercel.com/docs/ai-gateway/authentication-and-byok/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](https://vercel.com/docs/ai-gateway/authentication-and-byok/byok) (BYOK) requests.

Try Sakana Fugu Ultra in the [model playground](https://vercel.com/ai-gateway/models/fugu-ultra).

**AI Gateway: Track top AI models by usage**
The AI Gateway model leaderboard tracks the most popular models over time, ranking them by the total volume of tokens processed across all Gateway traffic.
[View the leaderboard](https://vercel.com/ai-gateway/leaderboards)

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📚 **More updates:** [View all changelog entries](/changelog/sitemap.md) | [Blog](/blog/sitemap.md)