Claude-fable-5 fails with routing_unsupported (requires non-ZDR provider policy) even with own API key — direct API call succeeds

[Colin]

Hey all!

We did actually ship a fix for this. However, as many of you are likely aware, Fable is not generally available at the moment.

Claude Fable 5 - Out Now!

Hey everyone! As you’ve well noticed, Fable is currently not accessible in Cursor or otherwise. Completely understandable and acceptable to discuss the circumstances around this, and we also ask the conversation remain civil and in the spirit of our community guidelines. This is not directed at any comment made so far, just a reminder for future discussion.

Thank you again for the reports.