[Bug] Anthropic API Error: Opus 5.5 safeguards flagging non-cybersecurity work

Status Open
Reported on v2.1.280
Maintainer reply None cached
Activity 3 comments · opened Sep 22, 2026

Bug Description
"hey whatsup" shows API Error: Opus 5.5's safeguards flagged this session (https://www.anthropic.com/legal/aup). You may be seeing this for the first time on an Opus model: Opus 5.5
is more capable and has stronger safeguards as a result, which can sometimes flag non-cybersecurity work. We're improving these safeguards to reduce the amount
of incorrectly flagged messages. Claude Code can't respond to your last message with Opus 5.5. in Opus 5.5

Environment Info

  • Platform: darwin
  • Terminal: iTerm.app
  • Version: 2.1.280
  • Feedback ID: c9999457-eacd-4511-bd75-fb96c762cf8c

Errors

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