Claude Opus & Sonnet 4.6: 1M Context Window Now GA
Claude Opus and Sonnet 4.6 now support 1M context windows in Kiro, up from 200K. Both models are out of experimental status and generally available for Pro+ subscribers.
TL;DR
- Claude Opus 4.6 and Sonnet 4.6 now support 1M context window (5x increase from 200K)
- Both models exit experimental status and are generally available
- Available in Kiro IDE and CLI for Pro, Pro+, and Power tier subscribers
New
- 1M context window for Opus 4.6 and Sonnet 4.6 — Process massive codebases, long conversations, and complex documents without truncation. This is a 5x increase from the previous 200K limit.
- General availability — Both models are no longer experimental, meaning they're production-ready and fully supported across Kiro's platform.
What Changed
- Restart your Kiro IDE or CLI to access the updated models. No configuration needed.
- Available to Pro, Pro+, and Power tier subscribers. Free tier users remain on previous model versions.
Update Kiro IDE or CLI to the latest version to see the changes take effect.
Source: Kiro
