Rohan Paul(@rohanpaul_ai):Claude Opus 5.5 simply writes better. Em dashes fall from 15.2 to 0.8 per 1,000 words, a 95% drop, while semicolons fall 73%. But Opus 5.5 did not become terse. It actually became 6% longer, from 453 to 481 words per answer, while average sentence length fell 17%, from 12.14 to 10.03 words.

Rohan Paul

@rohanpaul_ai

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Rohan Paul@rohanpaul_ai

2026.09.26 02:21

Claude Opus 5.5 simply writes better. Em dashes fall from 15.2 to 0.8 per 1,000 words, a 95% drop, while semicolons fall 73%. But Opus 5.5 did not become terse. It actually became 6% longer, from 453 to 481 words per answer, while average sentence length fell 17%, from 12.14 to 10.03 words.