Opus 4.8, Sonnet 5, and User Activity Monitoring now available on Kiro in AWS GovCloud (US)
Today’s signal AWS What’s New recently reported Opus 4.8, Sonnet 5, and User Activity Monitoring now available on Kiro in AWS GovCloud (US). Published context: July 24, 2026. Two new models are now available in the Kiro IDE and CLI for the AWS GovCloud (US) Regions. Claude Opus 4.8 is the most intelligent Opus model, delivering stronger self-verification, more efficient tool calling, and better follow-through on long-horizon projects. It plans before it edits, catches its own mistakes, and finds creative paths around obstacles in ...