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Claude Opus 5.5 uses 95% fewer em dashes, but its answers are getting longer
September 26, 2026 · BleepingComputer · Severity: MEDIUM
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.
Key Takeaways
- According to BleepingComputer, this cybersecurity development warrants attention from teams monitoring the evolving threat landscape.
- Security teams should review their exposure to this development and implement appropriate defensive controls.
- Regular monitoring of cybersecurity intelligence feeds and timely application of security updates remain critical defensive practices.