Amazon Bedrock now offers Claude Mythos Preview (Gated Research Preview)

Published
April 7, 2026
https://aws.amazon.com/about-aws/whats-new/2026/04/amazon-bedrock-claude-mythos/

Amazon Bedrock Introduces Claude Mythos Preview

Amazon Bedrock now offers the advanced AI model, Claude Mythos Preview, in a gated research preview as part of Project Glasswing. This model, developed by Anthropic, excels in cybersecurity, software coding, and complex reasoning tasks, identifying sophisticated security vulnerabilities and providing actionable insights with minimal manual guidance.

This release marks a significant advancement in AI capabilities for cybersecurity, enabling security teams to proactively address vulnerabilities in critical software. Anthropic and AWS are prioritizing internet-critical companies and open-source maintainers to ensure the benefits reach a broad audience.

What to do

  • Prepare for potential cybersecurity improvements in your software.
  • Stay informed about the capabilities and limitations of the new model.
  • Contact your AWS account team if you are on the initial allow-list for access.

Source: AWS release notes




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