Claude Sonnet 5.5 hand-draws stunning art in custom sketchbook — and always picks animals

RileyRalmuto · x · 2026-09-29

Developer Riley Ralmuto let Sonnet 5.5 freely draw in a custom-built agent sketchbook; the result, drawn stroke-by-stroke with no external tools, stunned them — arguably more beautiful than Opus 5.5's distinct style. Across generations, Claude models left to their own devices gravitate toward animals, echoing their known fondness for animal welfare.

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