# Fugu Ultra v2

> Fugu Ultra v2 is a language model from Sakana, released on 11 Sept 2026. It accepts text, images and files and generates text, with a 1M-token context window and up to 128K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $5 per million input tokens and $30 per million output tokens (OpenRouter), across 1 provider we track.

Source page: https://www.aimodel.directory/models/fugu-ultra-v2
Last verified: 4 Oct 2026

## Specifications

- **Developer:** Sakana
- **Release date:** 11 Sept 2026 (source: OpenRouter, https://openrouter.ai/sakana/fugu-ultra-v2)
- **Status:** Generally available
- **Context window:** 1M (1,000,000 tokens) (source: OpenRouter, https://openrouter.ai/sakana/fugu-ultra-v2)
- **Max output:** 128K tokens (source: OpenRouter, https://openrouter.ai/sakana/fugu-ultra-v2)
- **Knowledge cutoff:** 28 Aug 2026 (source: OpenRouter, https://openrouter.ai/sakana/fugu-ultra-v2)
- **Input:** Text, images and files (source: OpenRouter, https://openrouter.ai/sakana/fugu-ultra-v2)
- **Output:** Text (source: OpenRouter, https://openrouter.ai/sakana/fugu-ultra-v2)
- **Reasoning mode:** Yes (source: OpenRouter, https://openrouter.ai/sakana/fugu-ultra-v2)
- **Tool calling:** Yes (source: OpenRouter, https://openrouter.ai/sakana/fugu-ultra-v2)
- **Structured output:** Yes (source: OpenRouter, https://openrouter.ai/sakana/fugu-ultra-v2)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|
| OpenRouter | $5 | $30 | $0.50 | 1M |

## FAQ

### What is the context window of Fugu Ultra v2?

Fugu Ultra v2 has a context window of 1,000,000 tokens (1M) and can generate up to 128,000 tokens in a single response, according to OpenRouter.

### How much does the Fugu Ultra v2 API cost?

Fugu Ultra v2 is listed from $5 per million input tokens and $30 per million output tokens (OpenRouter). Prices last verified 4 Oct 2026.

### When was Fugu Ultra v2 released?

Sakana released Fugu Ultra v2 on 11 Sept 2026, according to OpenRouter.

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Data licensed CC BY 4.0. Cite as: AI Model Directory, "Fugu Ultra v2", https://www.aimodel.directory/models/fugu-ultra-v2