Claude Fable 5.1, Anthropic's new frontier model is now available on AWS

Published
September 1, 2026
https://aws.amazon.com/about-aws/whats-new/2026/09/claude-fable-5-1-aws/

AWS Release Notes

Claude Fable 5.1 is now available on AWS, offering enhanced capabilities for coding, scientific research, and enterprise workflows. This version improves reasoning tasks, reduces confident wrong answers, and is designed for long-running, high-stakes projects. It is available through Amazon Bedrock and the Claude Platform on AWS.

New Features

  • Enhanced intelligence for coding, scientific research, and enterprise workflows.
  • Improved reasoning on complex tasks with fewer confident wrong answers.
  • Designed for long-running, high-stakes projects, handling entire software projects over extended sessions.
  • Built-in safeguards for enterprise use, including additional data retention, safety review, and access policies.

What to do

Source: AWS release notes




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