Anthropic rumored to unveil clean 5.5 lineup (Fable, Opus, Sonnet, Haiku) before IPO

signulll · x · 2026-10-20

Account @signulll claims Anthropic is about to tidy its model lineup right before an IPO: Fable 5.5, Opus 5.5 (called the "absolute goat"), Sonnet 5.5 and Haiku 5.5, drawing a comparison to Jobs-era Apple product clarity. The claim comes from a third-party account, is unverified by Anthropic, and should be treated with caution.

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