Fable 5 refusals are 200 OK — your error handler misses them

Short summary

Fable 5 and Mythos 5 were suspended June 13 due to U.S. export controls and are unavailable globally with no restoration date. When Fable 5 refuses requests, it returns HTTP 200 with stop_reason: "refusal", not an error status—naive error handlers miss these silently. Developers must check stop_reason directly and switch to Opus 4.8, Sonnet, or Haiku until restoration.

• •Fable 5 and Mythos 5 suspended indefinitely (June 13, 2026) due to U.S. export-control directive
• •Refusals return HTTP 200, not 4xx/5xx—standard error handlers fail to catch them
• •Update error handling to check stop_reason field; use Opus 4.8/Sonnet/Haiku as alternatives

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