[Bug] Claude Fable 5 flagged legitimate security discussion and downgraded to Opus

Open 💬 2 comments Opened Jun 12, 2026 by psawaya

Bug Description
I'm trying to preemptively stop griefing / security issues on my project, and that flagged the conversation and pushed me back to Opus 4.8 :(

Does that mean Fable can't even be used for defensive security?

Here was my original prompt:

Here's a smattering of other things I'm worried about: 1. People griefing by uploading a lot of games with large files, intentionally. Especially since there's a lot of anti-AI folks out there who hate anything like this irrationally. And because we by necessity allow anonymous uploads. 2. Not taking advantage of the build pass that people have and uploading unminified code 3. Accidentally uploading people's sensitive .env files 4. Not having good enough tagging to notice when someone is uploading a new version of an existing game (or a remix of an existing game) rather than a totally new game 5. Our skill munching too much of our user's token limit and making them cranky

Environment Info

  • Platform: darwin
  • Terminal: ghostty
  • Version: 2.1.172
  • Feedback ID: 46ff41b1-f741-44cf-9fe0-3e27906b2b54

Errors

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