ANTHROPIC: Fable 5.2 and MYTHOS 5.2 outperform OPUS 5.5 across nearly all evaluated capabilities. Testers say they communicate more clearly than prior Fable and MYTHOS models. Output speed is ~30% faster than Fable 5.1 and MYTHOS 5.1.

2026-11-10

ANTHROPIC: Fable 5.2 and MYTHOS 5.2 outperform OPUS 5.5 across nearly all evaluated capabilities. Testers say they communicate more clearly than prior Fable and MYTHOS models. Output speed is ~30% faster than Fable 5.1 and MYTHOS 5.1.