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Claude Sonnet 5.5 now available on AWS GovCloud (US)

Published
September 28, 2026
https://aws.amazon.com/about-aws/whats-new/2026/09/claude-sonnet-5-5-aws-govcloud-us/

AWS GovCloud (US) Release Notes

AWS GovCloud (US) now offers Claude Sonnet 5.5, a smarter and more efficient Sonnet that delivers significant improvements in coding and knowledge work at a lower cost per task and faster speed.

New Features

  • Enhanced coding capabilities for completing well-scoped tasks.
  • Improved efficiency for larger coding strategies, such as building and fixing features in the same session.
  • Produces ready-to-share knowledge work, including 1-pagers, diagrams, summary slides, document edits, and spreadsheet cleanup.

What to do

  • Upgrade to Sonnet 5.5 for better coding and knowledge work efficiency.
  • Explore the new capabilities for larger coding strategies.
  • Utilize the ready-to-share knowledge work outputs.

Source: AWS release notes




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