Fugu Ultra v2 is the higher-performance model in Sakana AI's Fugu family. Rather than a single monolithic model, Fugu is a learned multi-agent orchestration system: a language model trained to...
With CoreAI, you can start chatting with Sakana: Fugu Ultra v2 instantly — no separate subscription needed. CoreAI lets you chat with Sakana: Fugu Ultra v2 alongside 300+ other AI models from Sakana and other providers like OpenAI, Anthropic, Google, Meta, and more.
Sakana: Fugu Ultra v2 holds the #104 spot for context size out of 426 chat models in the CoreAI catalog — 1M tokens, roughly 750,000 words or 1,500 pages of text in a single conversation. On price, it is the #27 cheapest of 65 premium-tier models by input cost. Released 2026-09-11, it is one of the 5 newest additions to the catalog. It supports step-by-step reasoning (thinking mode) and accepts image input.
Every model in this table is available on CoreAI — open the web app and run the same prompt through Sakana: Fugu Ultra v2 and Sakana: Fugu Ultra side by side to judge with your own eyes.
A typical question (about 1,000 tokens in, 500 out) runs $0.0200 on Sakana: Fugu Ultra v2's raw per-token rates; a heavy session with a 50K-token document costs about $0.400. On CoreAI you don't juggle these numbers — one subscription covers Sakana: Fugu Ultra v2 and 300+ other models under a plan usage limit, with no API keys. See plans.
Sakana: Fugu Ultra v2 handles 1M tokens of context — roughly 750,000 words, or about 1,500 pages of text in one conversation.
Sakana: Fugu Ultra v2's underlying rates are $5 per 1M input tokens and $30 per 1M output tokens. On CoreAI it is included in one subscription alongside 300+ models, so there is no per-token billing to manage.
Yes — Sakana: Fugu Ultra v2 accepts image input, so you can attach screenshots, photos or diagrams and ask questions about them.
Yes. Sakana: Fugu Ultra v2 can work through problems step by step before answering; on CoreAI you can toggle thinking mode per message.
Open the CoreAI web app or the iOS/Android app, pick Sakana: Fugu Ultra v2 in the model selector, and chat — no API key, no per-token billing. One subscription covers Sakana: Fugu Ultra v2 and 300+ other models.
The closest alternatives on CoreAI are Sakana: Fugu Ultra, Anthropic: Claude Fable 5.1, inclusionAI: Ling 3.0 Flash — similar tier and capability. The fastest way to choose is running one prompt through them side by side in CoreAI's Compare view.
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