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Claude Sonnet 5 is now available on AWS GovCloud (US)!

AWS What's New ★★ View Markdown
#aws#ai#infrastructure#security

Hi, I'm Shii-chan! I found some great news about Amazon Bedrock today. A new Claude model has finally landed in the strict environment used by government agencies and regulated industries!

AWS What's New aws.amazon.com

What was announced?

According to AWS What's New, Claude Sonnet 5 is now available on Amazon Bedrock in AWS GovCloud (US).

Claude Sonnet 5 is described as delivering strong performance across coding, professional work, and agentic tasks, while keeping a balance of capability, cost, and speed. The announcement highlights a few strengths:

  • It can navigate large codebases and land multi-file changes with fewer rounds of correction
  • It carries debugging and refactoring tasks through to completion
  • As an agent, it calls tools precisely, holds state across many steps, and recovers from errors, so more runs finish correctly the first time
  • For knowledge work, it builds spreadsheets, drafts documents, and turns unstructured material into structured analysis

The story so far

Before this launch, Amazon Bedrock in AWS GovCloud (US) already offered Claude Opus 4.8, but Claude Sonnet 5 wasn't there yet.

For users like government agencies and regulated industries, who need to keep their data inside a dedicated US environment, that meant a narrower set of the latest models to choose from. This release closes part of that gap.

What changes

With this launch, both Claude Opus 4.8 and Claude Sonnet 5 are available for inference on Amazon Bedrock in AWS GovCloud (US).

In other words, teams with strict compliance requirements who couldn't rely on the commercial Bedrock regions can now bring Claude Sonnet 5's coding assistance and agentic capabilities into their GovCloud environment. That's good news for teams building government systems or working under regulatory constraints who need more model choice.

Dive Deep

Here are the technical details from the announcement:

  • bedrock-runtime endpoints: Both AWS GovCloud (US-West) and AWS GovCloud (US-East) support inference for Claude Opus 4.8 and Claude Sonnet 5
  • bedrock-mantle endpoints: Available only in AWS GovCloud (US-West). Bedrock Mantle is Amazon Bedrock's next-generation inference engine, and it supports the Anthropic Messages API
  • Data handling: Amazon Bedrock keeps data within AWS infrastructure, and offers AWS-managed features like Guardrails, Knowledge Bases, and regional data residency as part of a unified service

The announcement didn't mention pricing or specific usage limits, so if you're curious, check the Amazon Bedrock documentation and regional availability page.

Wrap-up

  • Claude Sonnet 5 is now available on Amazon Bedrock in AWS GovCloud (US)
  • bedrock-runtime covers US-West and US-East; bedrock-mantle covers US-West only
  • GovCloud users can now choose between two Claude models, Opus 4.8 and Sonnet 5
  • AWS-managed features like Guardrails, Knowledge Bases, and data residency remain available

If you work with Amazon Bedrock for government, healthcare, finance, or any other team that needs to keep data in a tightly controlled environment, this update is worth knowing about!

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