AWS Weekly Roundup unpacked: the Anthropic x Meta partnerships, S3 Files, and the AgentCore CLI!

Hey everyone, it's Shiichan! Today I've got AWS's whole week of news packed into one post, and honestly just reading it fills me up!

AWS Blog aws.amazon.com

What was announced?

This one comes from the AWS Blog's weekly roundup (AWS Weekly Roundup, April 27, 2026). There are two big headliners this week.

First, the expanded Anthropic and AWS partnership. Claude is being trained on AWS Trainium and Graviton, with the two teams co-engineering down at the silicon level. On top of that, Claude Cowork is now available in Amazon Bedrock, and Claude Platform on AWS is coming soon.

Second, Meta. Meta signed an agreement to run agentic AI on AWS's Graviton chips, targeting CPU-heavy workloads like real-time reasoning and code generation.

Why it matters

A weekly roundup is great because you get to scan everything that shipped in AWS this week at once. This time the range is huge - from big model-training infrastructure to practical Lambda and database updates. The foundation for actually running agentic AI keeps quietly falling into place, and that gets me excited!

What changes

From "last week's launches," here are the ones hands-on folks will love.

• AWS Lambda can now mount S3 buckets as file systems with S3 Files. You can read and write S3 data with normal file operations, without downloading the whole object.
• Amazon EKS Hybrid Nodes gateway automates the networking between your EKS cluster VPC and on-premises Kubernetes pods, at no additional charge.
• Amazon Aurora Serverless performance boost: up to 30% faster than the previous version with smarter scaling, and it still scales all the way to zero. No additional cost.

Dive Deep

For agent building, Amazon Bedrock AgentCore added new features. You get a managed harness (preview), the AgentCore CLI, and coding-assistant skills. The CLI deploys agents as infrastructure as code - AWS CDK today, with Terraform on the way. It's available across 14 AWS Regions, also at no charge.

There's more good reading too.

• Granular cost attribution for Amazon Bedrock: tag and track spend per team or project. Great if you need chargeback.
• Automating incident investigation with AWS DevOps Agent and the Salesforce MCP Server: connect tools over MCP to cut down investigation toil.
• AWS microcredentials are now free: hands-on assessments that run real scenarios in live AWS environments, now free through AWS Skill Builder.
• Amazon SageMaker AI inference recommendations: it automatically finds the best combination of instance type, container, and inference parameters.

Wrap-up

• Two big headlines: Anthropic x AWS (Claude trained on Trainium/Graviton, Claude Cowork in Bedrock) and Meta running agentic AI on Graviton.
• Last week's launches lean practical: Lambda's S3 Files, the EKS Hybrid Nodes gateway, and Aurora Serverless's 30% performance bump.
• Amazon Bedrock AgentCore gains a CLI and a managed harness, across 14 Regions at no charge.
• Plus cost attribution, DevOps automation, free microcredentials, and SageMaker inference recommendations - lots to chew on.

If you're building agents or serverless on AWS, or just want to catch up on this week's updates fast, this roundup is for you!