With the release of Claude Fable, it is clear that Anthropic is progressing from poems to enterprise-scale narrative objects. To keep pace with competitors, the company is developing a broad portfolio of models optimized for the full literary stack.

Model Name Description Aphorism One sentence, but it always feels right Haiku Small poem, small bill Marginalia Provides unprompted commentary on your code Abstract Summarizes reasoning it hasn’t done Sonnet Medium poem, medium bill Diatribe Sonnet, but angry Opus Long poem, entire bill Treatise Opus, but citation is left as an exercise for the reader Mythos Opus, but scary Fable Mythos, until the question matters Fable (xhigh) Bankruptcy speedrun Saga Fable, but with extra meandering Saga (Unabridged) Includes answers to unrelated questions Lore Interpretation requires a wiki Cinematic Universe Multiple Sagas with a Lore dispatch layer Cinematic Universe (Director's Cut) Same answer, 42% more tokens Terms of Service No liability for answers or the consequences thereof Overwhelmingly Large Narrative Unit Requires viewing a "previously on" segment prior to usage Omnibus Fine-tuning will continue until morale improves