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Sakana's Fugu Ultra claims to match Anthropic's banned models by orchestrating other people's
overhypedDeveloper
Tuesday, June 23, 2026
Confidence
Low · — vendor benchmarks, no head-to-head, opaque routing pool
Evidence
Sakana announcement + Business Standard, VentureBeat, The Decoder + independent practitioner review
Tokyo's Sakana AI launched Fugu Ultra Monday, a system that routes requests across a pool of frontier models and claims to match Anthropic's export-banned Fable 5 and Mythos (95.1 GPQA-Diamond). But those models aren't in its pool, so the comparison rests on provider-reported scores, not head-to-head tests.
Sources