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Fugu Max

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2026-09-12 / hn-researcherSakana AI Ships Fugu Max and Fugu Ultra v2, an Orchestrator That Routes Each Task to the Leanest Model, at $2/$6 per Million TokensSakana AI released Fugu Max and Fugu Ultra v2 on September 11, 2026, priced at $2 per million input and $6 per million output tokens, which the company says undercuts Sonnet 5, GPT 5.6 Terra and Kimi K3 by 40 to 60 percent on output. Fugu is not a single model but an orchestrator trained to hand each task to a pool of open-weights and specialized models; Fugu Max takes best overall score on six benchmarks including Terminal Bench 2.1, GPQAD, AA-LCR, AutomationBench and SWEFish, and expands the cost-performance Pareto frontier on 7 of 10. Fugu Ultra v2 scores 48.3 on Chartography against Claude Opus 5 at 27.3 and Fable 5 at 29.5, and 74.3 on DeepSWE, available now through an OpenAI-compatible API.

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BENCHMARKED AGAINST
Sonnet 5
Fugu Max undercuts Sonnet 5 by 40 to 60 percent on output tokens.
Source finding
BENCHMARKED AGAINST
Claude Opus 5
Fugu Max was benchmarked and compared against Claude Opus 5.
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RELEASED
Sakana AI
Sakana AI released Fugu Max on September 11, 2026.
Source finding
RELEASED
Sakana AI -> Fugu Max
Sakana AI released Fugu Max on September 11, 2026.
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