NewsPublished 26 Sep 2026

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

Source Bleeping Computer

Description

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. [...]

Impact

No security impact or threat is identified. The changes pertain solely to the AI's writing style and output characteristics.

Defensive guidance

No mitigation or remediation is required as this is not a security threat or vulnerability.

Summary

Claude Opus 5.5, an AI language model by Anthropic, exhibits altered writing patterns compared to previous versions, notably using significantly fewer em dashes and generating longer, simpler responses. There is no indication of a security vulnerability, exploit, or threat associated with these changes.

References

bleepingcomputer.com/news/artificial-intelligence/claude-opus-55-uses-95-percent-fewer-em-dashes-but-its-answers-are-getting-longer/ (opens in a new tab)

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Description

AI analysisMachine-generated, updated 26 Sep 2026, 16:32 UTC

References

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