Opus 4.8, Sonnet 5, and User Activity Monitoring now available on Kiro in AWS GovCloud (US)

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 instead of stalling, making it well suited for complex multi-step tasks that previously required close supervision. Available with a 1M context window and 2.2x credit multiplier.

Claude Sonnet 5 is the most agentic Sonnet model, bringing stronger reasoning, tool use, and coding at Sonnet-class pricing. It approaches Opus 4.8 on reasoning and agentic coding benchmarks while running at meaningfully lower cost, giving developers a cost-performance dial between maximum accuracy and higher throughput. Available with experimental support, a 1M context window, and 1.3x credit multiplier.

Kiro enterprise administrators now have full visibility into organizational usage through built-in monitoring and tracking. A usage dashboard provides aggregate metrics at a glance, per-user activity reports deliver daily CSV telemetry (credits, model usage, and more) to your S3 bucket for license optimization and audit, and optional prompt logging captures user prompts and Kiro responses for compliance and debugging. All data is stored in your own account with no additional charge beyond S3 storage.

Ensure your IDE or CLI is updated to the latest version, then restart it to access the new models from the model selector. For more details, visit the GovCloud documentation, the monitoring and tracking guide, or contact your AWS account team. To learn more about Kiro, visit the Kiro product page.