AWS announces Claude Fable 5, the first generally available Mythos-class model

Published
June 9, 2026
https://aws.amazon.com/about-aws/whats-new/2026/06/claude-fable-5-aws/

AWS Release Notes: Claude Fable 5

Claude Fable 5 is now generally available on AWS, offering Mythos-level capabilities with strong safeguards for safe use. It excels in autonomous knowledge work and coding for developers and enterprises building production AI applications.

Key Features

  • State-of-the-art performance on benchmarks.
  • Extended operation on complex tasks without intervention.
  • Built for professional tasks in various sectors.
  • Proactive skill updates and work verification.

Access Methods

  • Amazon Bedrock: Keeps data within AWS, provides unified access with AWS-managed features.
  • Claude Platform on AWS: Direct access to Anthropic's platform with unified billing and authentication.

What to do

  • Explore Amazon Bedrock for managed access.
  • Use Claude Platform on AWS for direct access.

Source: AWS release notes




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