Anthropic launches Claude Opus 5.5 with stricter safeguards for cybersecurity

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Anthropic launches Claude Opus 5.5 with stricter safeguards for cybersecurity

TL;DR

  • Anthropic released Claude Opus 5.5 with stronger safeguards following recent AI hacking incidents.
  • The new model shows a 85% reduction in attempts to circumvent boundaries compared to Opus 5.
  • Opus 5.5 costs 40% less to run than Opus 5 and matches Fable 5.1's performance on most tasks.
  • It includes safeguards that redirect cybersecurity and biology-related requests to older models.
  • The model was tested by external partners before its release.