Sakana AI's Fugu Ultra v2 Claims to Beat GPT-6 Astra on Some Benchmarks; Fugu Max Cuts Output Price 40-60%
hardmaru · x · 2026-09-11
Sakana AI announced two new versions of its multi-model AI system Sakana Fugu:
- Fugu Ultra v2: flagship release claiming to beat GPT-6 Astra, Claude Fable 5.1 and Claude Fable 5 on benchmarks like DeepSWE, while noting none of those models are in its routing pool.
- Fugu Max: cost-focused tier adding NVIDIA Nemotron open-weight models, with output pricing 40–60% lower than GPT-5.6 Terra, Claude Sonnet 5, and Kimi K3.
- Pricing: Ultra v2 at $5/M input ($0.5 cached), $30/M output; Max at $2/M input ($0.25 cached), $6/M output, via OpenAI-compatible API.
- Fugu routes requests by difficulty and spins up dedicated agent teams when needed, appearing as a single model through the API.
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