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Cybersecurity DEVELOPING

Claude Opus 5.5 uses 95% fewer em dashes, but its answers are getting longer

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Illustrative photo.Photo by Nic Wood on Pexels

What happened

Anthropic's Claude Opus 5.5 appears to be changing how it writes, with new analysis showing fewer obvious AI writing patterns, shorter sentences, and simpler wording compared with Opus 5.

Sources & evidence