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

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. Claude Opus 5.5 is not only one of the best models for coding, but it also appears to be a bit better at writing, as Anthropic appears to be changing how AI writes. According to Arena, an AI benchmarking tool, Op