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Anthropic’s Claude Sonnet 4.5 is now in Amazon Bedrock in AWS GovCloud (US)

Published
November 10, 2025
https://aws.amazon.com/about-aws/whats-new/2025/11/anthropics-claude-sonnet-4-5-amazon-bedrock-aws-govcloud-us

Amazon Bedrock

Customers can now use Claude Sonnet 4.5 in Amazon Bedrock in AWS GovCloud (US-West) and AWS GovCloud (US-East) via US-GOV Cross-Region Inference. This model excels at building complex agents, coding, and long-horizon tasks while maintaining optimal speed and cost-efficiency for high-volume use-cases.

New features include:

  • Enhanced instruction following
  • Better code improvement identification
  • Stronger refactoring judgment
  • More effective production-ready code generation

Additionally, a new memory tool lets Claude store and consult information outside the context window to boost accuracy and performance.

What to do

Source: AWS release notes




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