October 14, 2026 Claude Sonnet 4 reaches end of life Claude Sonnet 4 has reached end of life in Kiro as of October 14, 2026 . If your work depends on it, choose another available model before continuing. Claude Sonnet 5.5 is the latest Sonnet model. See Model lifecycle for lifecycle stages and end-of-life dates. { PREVIOUS } Claude Sonnet 5.5 now available in AWS GovCloud (US) { NEXT } Claude Sonnet 4.6 is now available in Kiro
Kiro: Claude Sonnet 4 reaches end of life
First seen · AWS / Kiro
Must-know
Models:Adds Claude Sonnet 4 ·Adds Claude Sonnet 5.5 ·Adds Claude Sonnet 4.6