Cloud & Infrastructure News: Amazon S3 Files, AWS Transform, and Claude Mythos, 2026-04-26

Amazon S3 Files: Buckets as File Systems

AWS has announced the general availability of Amazon S3 Files, a major shift in how developers interact with object storage. This new shared file system makes S3 buckets accessible as standard file systems, allowing compute resources to access data using standard file system semantics.

The primary benefit is the elimination of the need to duplicate data between object storage (S3) and file storage (EFS/FSx) to achieve low-latency performance. This significantly simplifies data pipelines and reduces the architectural complexity of applications that require both the scale of S3 and the performance of a POSIX-compliant file system.

AWS Transform and Agentic Migration

To combat growing tech debt, AWS has launched AWS Transform, now available as an integration for VS Code and Kiro. This is an "agentic migration and modernization factory" that helps developers handle large-scale infrastructure changes and version upgrades (e.g., Java or Python updates) directly within their IDE.

By automating the tedious parts of modernization, AWS Transform allows teams to reduce tech debt without the risk of manual, error-prone refactoring across thousands of files. This reflects a broader trend of moving "migration" tasks from manual human effort to AI-driven agentic loops.

Claude Mythos in Amazon Bedrock

Anthropic's most sophisticated model class, Claude Mythos, is now available in preview via Amazon Bedrock (Project Glasswing). Unlike general-purpose models, Mythos is a specialized class focused on cybersecurity and high-stakes reasoning.

Mythos is designed to identify complex vulnerabilities and perform deep architectural reasoning across massive codebases, making it an essential tool for security researchers and enterprise architects. This release coincides with the AWS Agent Registry, a new centralized catalog for managing AI agents and MCP servers via Bedrock AgentCore.