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.