Added support for Claude Sonnet 4.6, a full upgrade from Sonnet 4.5 that approaches Opus 4.6 intelligence while being more token efficient. Sonnet 4.6 excels at iterative development workflows, maintains context across long sessions, and handles both lead agent and subagent roles in multi-model pipelines. Well-suited for teams using Kiro powers and custom subagents.

Available with experimental support in both the Kiro IDE and Kiro CLI for Pro, Pro+, and Power tier subscribers signing in with Google, GitHub, AWS Builder ID, AWS IAM Identity Center, or external IDP. Supported in us-east-1 (N. Virginia) and eu-central-1 (Frankfurt) with a 1.3x credit multiplier. Restart your IDE to access it from the model selector. Learn more ->