[Anthropic Fable 5.1 Suspected to Have Entered AWS Backend: Model ID Changed from 400 to 404] Beating AI Newsflash: Amazon Bedrock has started returning a 404 'Model not found' error for the suspected Fable 5.1 model ID (the name specified for the model in the API). Randomly entered model names still return a 400 error, but Fable 5.1 now results in a 404. According to AWS error code definitions, this indicates that Fable 5.1 has already entered the Bedrock backend, and preparations for its launch are underway. [Original link]