Bedrock – Fable 5: Unable to reach the model provider

Support Bug Reports
,
6

Hi Eric,

Thanks for the detailed report, and sorry for the trouble! Fable 5 launched very recently and isn’t available through AWS Bedrock yet — it currently runs via Cursor’s standard Anthropic connection, so global.anthropic.claude-fable-5 isn’t recognized as a valid Bedrock model. That’s what triggers the generic “Unable to reach the model provider” error. Your AWS data retention setup isn’t the cause.

Here’s my recommended steps to get quickly unblocked:

  • Use Fable 5 from Cursor’s normal model picker (with Bedrock toggled off for those requests).
  • Keep using Bedrock for the supported models — Opus, Sonnet, and Haiku — which is why Opus 4.8 works for you.