Opus 5.5 improves natural expression and follows writing rules

Claude @claudeaiOriginally posted 2026.09.23

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Opus 5.5 communicates more naturally, addressing some of the most common feedback we heard on Opus 5. It puts the most important information up front and follows the writing rules you give it, which makes long sessions easier to follow. https://t.co/kRylzT9nUn