SECURITYQUIET
20 days ago
Claude Opus 5.5 uses 95% fewer em dashes, but its answers are getting longer
SIGNALSMONITORSECURITY
What's happening
SignalsMonitor is following this as a security story. BleepingComputer is the outlet attached so far. The first report grouped here was at 26 Sept 2026, 16:26 UTC. The headline in use is “Claude Opus 5.5 uses 95% fewer em dashes, but its answers are getting longer”. This note is SignalsMonitor's own briefing, not the publisher's article.
What we know
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.
BleepingComputerRead at BleepingComputer
Story timeline
Reports grouped into this story, earliest first. Exact repeats from the same outlet are collapsed.
- First reported by BleepingComputer
Claude Opus 5.5 uses 95% fewer em dashes, but its answers are getting longer
Reported by 1 outlet
- BleepingComputer