AWS Weekly Roundup: Claude Mythos Preview in Amazon Bedrock, AWS Agent Registry, and more (April 13, 2026)

AWS Weekly Roundup: Claude Mythos Preview in Amazon Bedrock, AWS Agent Registry, and more (April 13, 2026)

In my last Week in Review post, I mentioned how much time I’ve been spending on AI-Driven Development Lifecycle (AI-DLC) workshops with customers this year. A common theme in those sessions is the need for better cost visibility. Teams are moving fast with AI, but as they go from experimenting to full production, finance and leadership really need to know who is using which resources and at what cost. That’s why I was so excited to see the launch of Amazon Bedrock new support for cost allocation by IAM user and role this week. This lets you tag IAM principals with attributes like team or cost center and then activate those tags in your Billing and Cost Management console. The resulting cost data flows into AWS Cost Explorer and the detailed Cost and Usage Report, giving you a clear line of sight into model inference spending. Whether you’re scaling agents across teams, tracking foundation model use by department, or running tools like Claude Code on Amazon Bedrock, this new feature is a game changer for tracking and managing your AI investments. You can get all the details on setting this up in the IAM principal cost allocation documentation.

Now, let’s get into this week’s AWS news…

Headlines

Amazon Bedrock now offers Claude Mythos Preview Anthropic’s most sophisticated AI model to date is now available on Amazon Bedrock as a gated research preview through Project Glasswing. Claude Mythos introduces a new model class focused on cybersecurity, capable of identifying sophisticated security vulnerabilities in software, analyzing large codebases, and delivering state of the art performance across cybersecurity, coding, and complex reasoning tasks. Security teams can use it to discover and address vulnerabilities in critical software before threats emerge. Access is currently limited to allowlisted organizations, with Anthropic and AWS prioritizing internet critical companies and open source maintainers.

AWS Agent Registry for centralized agent discovery and governance now in preview AWS launched Agent Registry through Amazon Bedrock AgentCore, providing organizations with a private catalog for discovering and managing AI agents, tools, skills, MCP servers, and custom resources. The registry helps teams locate existing capabilities rather than duplicating them, with semantic and keyword search, approval workflows, and CloudTrail audit trails. It is accessible via the AgentCore Console, AWS CLI, SDK, and as an MCP server queryable from IDEs.

Last week’s launches Here are some launches and updates from this past week that caught my attention:

Announcing Amazon S3 Files, making S3 buckets accessible as file systems— Amazon S3 Files transforms S3 buckets into shared file systems that connect any AWS compute resource directly with your S3 data. Built on Amazon EFS technology, it delivers full file system semantics with low latency performance, caching actively used data and providing multiple terabytes per second of aggregate read throughput. Applications can access S3 data through both file system and S3 APIs simultaneously without code modifications or data migration.

Amazon OpenSearch Service supports Managed Prometheus and agent tracing—Amazon OpenSearch Service now provides a unified observability platform that consolidates metrics, logs, traces, and AI agent tracing into a single interface. The update includes native Prometheus integration with direct PromQL query support, RED metrics monitoring, and OpenTelemetry GenAI semantic convention support for LLM execution visibility. Operations teams can correlate slow traces to logs and overlay Prometheus metrics on dashboards without switching between tools.

Amazon WorkSpaces Advisor now available for AI powered troubleshooting— AWS launched Amazon WorkSpaces Advisor, an AI powered administrative tool that uses generative AI to help IT administrators troubleshoot Amazon WorkSpaces Personal deployments. It analyzes WorkSpace configurations, detects problems automatically, and provides actionable recommendations to restore service and optimize performance.

Amazon Braket adds support for Rigetti’s 108 qubit Cepheus QPU— Amazon Braket now offers access to Rigetti’s Cepheus-1-108Q device, the first 100+ qubit superconducting quantum processor on the platform. The modular design features twelve 9 qubit chiplets with CZ gates that offer enhanced resilience to phase errors. It supports multiple frameworks including Braket SDK, Qiskit, CUDA-Q, and Pennylane, with pulse level control for researchers.

For a full list of AWS announcements, be sure to keep an eye on the What’s New with AWS page.

Other AWS news Here are some additional posts and resources that you might find interesting:

Building automated AWS Regional availability checks with Amazon S3— Storage blog post on implementing automated systems for monitoring service availability across AWS regions using Amazon S3 as core infrastructure.

Understanding Amazon Bedrock model lifecycle— Machine learning blog post that walks through the stages foundation models go through in Bedrock from availability through deprecation, helping teams plan for model updates and manage version dependencies in production.

Building memory intensive apps with AWS Lambda managed instances— Compute blog post exploring how Lambda managed instances extend the platform beyond lightweight workloads to support memory intensive applications while maintaining serverless benefits.

Deploy OpenClaw on AWS: Choose the right options for your AI workload— Builder Center guide comparing four AWS deployment options for OpenClaw: Amazon Lightsail for individual developers, Amazon EC2 for startups needing deeper AWS integration, Amazon Bedrock AgentCore for serverless multiuser scenarios, and Amazon EKS for enterprises requiring VM level isolation and advanced orchestration.

We’re bringing back the Kiro startup credits program— Kiro is relaunching its startup credits initiative, offering eligible early stage companies complimentary access to Kiro Pro+ for up to one year. The three tier program (Starter, Growth, Scale) provides 2 to 30 users based on team size, with rolling applications accepted globally.

Upcoming AWS events Check your calendar and sign up for upcoming AWS events:

What’s Next with AWS (April 28, Virtual) Join this livestream at 9am PT for a candid discussion about how agentic AI is transforming how businesses operate. Featuring AWS CEO Matt Garman, SVP Colleen Aubrey, and OpenAI leaders discussing emerging agent capabilities, Amazon’s internal experiences, and new agentic solutions and platform capabilities.

Browse here for upcoming AWS led in person and virtual events, startup events, and developer focused events.

That’s all for this week. Check back next Monday for another Weekly Roundup!

~ micah