According to CoinMeta, Anthropic Fable 5.1 seems to have entered the AWS backend, and the model ID has changed from returning a 400 status code to a 404 status code. Amazon Bedrock now returns a 404 status code for models ID of Fable 5.1 (including model, not, and found), while randomly filled in model names still result in a 400 status code. This indicates that Fable 5.1 has also entered the Bedrock backend, and the preparation for its launch is underway.