This documentation is a copy of the public Kiro documentation. For supplemental information that is specific to this region, such as feature and service availability, see the AWS Classified Regions User Guide. Published: October 14, 2026.

Models changelog

Stay up to date with the latest updates and improvements to Kiro.

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Feb 5, 2026

Models

Claude Opus 4.6 support

Added support for Claude Opus 4.6 — Anthropic's most powerful model and the world's best for coding. Opus 4.6 excels on large-scale codebases and long-horizon projects, making it ideal for spec-driven development and sophisticated agents. Available with experimental support in both the Kiro IDE and Kiro CLI for Pro, Pro+, and Power tier subscribers with a 2.2x credit multiplier. Supported in us-east-1 for users authenticating with IAM Identity Center. Restart your IDE to access it from the model selector.

Dec 12, 2025

Models

Claude Opus 4.5 support for AWS IAM Identity Center users

We've added support for Claude Opus 4.5 to AWS IAM Identity Center users in both us-east-1 and eu-central-1 regions. Claude Opus 4.5 is available in both the Kiro IDE and Kiro CLI for Pro, Pro+, and Power tier subscribers.

Nov 24, 2025

Models

Claude Opus 4.5 support

Added support for Claude Opus 4.5 - Anthropic's most intelligent model combining maximum capability with practical performance. Ideal for complex specialized tasks, professional software engineering, and advanced agents. Claude Opus 4.5 is available in both the Kiro IDE and Kiro CLI for Pro, Pro+, and Power tier subscribers.