[Bug] Anthropic API Error: Messages flagged without explanation or apparent policy violation
Status Open
Reported on v2.1.280
Maintainer reply None cached
Workaround ✓ Mentioned in description ↑
Activity 0 comments · opened Sep 23, 2026
Bug Description
Session ruined because of messages being flagged without anything remotely like barred content, no reasons given to be able to work around.
Environment Info
- Platform: darwin
- Terminal: iTerm.app
- Version: 2.1.280
- Feedback ID: ad9cee1d-e904-4d18-8079-635b5b7aa770
Errors
API Error: Opus 5.5 (1M context)'s safeguards flagged this message (https://www.anthropic.com/legal/aup). This sometimes happens with safe, normal conversations. Claude Code can't respond to this message with Opus 5.5 (1M context).
Double press esc to edit your last message, or try a different model with /model.
Send feedback with /feedback or learn more: https://support.claude.com/en/articles/8106465
Details: `[reasoning_extraction]`
Request ID: req_011CfLpiq8WjFPBJq68uTTgr