- Haiku 5.5, the fastest Claude 5.5 model, is now available in the Kiro IDE and CLI for AWS GovCloud (US) regions, including all three Claude 5.5 models
- Provides a 1 M token context window with a 0.06× credit multiplier (0.3× for requests over 100 K tokens)
- Requires updating to the latest Kiro version and restarting the IDE/CLI to select the new model