AI BriefingAWS Weekly News: Claude Mythos Preview on Amazon Bedrock, AWS Agent Registry, and More (April 13, 2026)
Key point
Claude Mythos Preview was added to Amazon Bedrock, and AWS Agent Registry was released in preview.
Details
Amazon Bedrock now includes Anthropic's Claude Mythos Preview as a gated research preview. The model focuses on cybersecurity, large codebase analysis, and complex reasoning and coding tasks, and is currently accessible only to approved organizations.
At the same time, AWS Agent Registry was released in preview through Amazon Bedrock AgentCore. It allows organizations to discover and manage AI agents, tools, skills, MCP servers, and custom resources in one place, offering semantic/keyword search, approval workflows, and CloudTrail audit trails.
Beyond these two announcements, several other AWS updates arrived this week.
- Amazon S3 Files: Lets you treat S3 buckets like a file system, enabling direct connection to AWS compute
- Amazon OpenSearch Service: Added support for Managed Prometheus and agent tracing
- Amazon WorkSpaces Advisor: An AI-powered troubleshooting tool
- Amazon Braket: Added support for Rigetti's 108-qubit Cepheus QPU
In addition, AWS highlighted enhanced cost visibility through Bedrock cost allocation support based on IAM user and role. By attaching attributes like team or cost center to IAM principals, it enables cost tracking that flows into Billing, Cost Explorer, and Cost and Usage Report.
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