Claude Opus 4.6 and Sonnet 4.6 upgraded to 1M context window

Claude Opus 4.6 and Claude Sonnet 4.6 now support a 1M context window, up from 200K, and are no longer marked as experimental. Both models are now generally available in the Kiro IDE and Kiro CLI for Pro, Pro+, and Power tier subscribers. Restart your IDE or CLI to see the updated models. Learn more ->