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.
Stay up to date with the latest updates and improvements to Kiro.
Follow us:This release improves agent reliability when creating and overwriting long files. We fixed a bug that prevented the agent from recovering from failures, improving overall stability.
This release brings spec task management, intelligent code diagnostics, AI-powered commit messages, and refined agent interactions to streamline your development process.
Support for Sonnet 4.5 (experimental): You can now send your prompts to Sonnet 4.5 via the chat box. Sonnet 4.5 is also available in Auto, our agent which uses a variety of task-specific foundation models under the hood
Spec MVP tasks: During spec creation, you can now mark tasks (including unit tests) as optional to prioritize core features while keeping comprehensive task lists
Diagnostics Tool: Added diagnostics tool to provide agent with syntax, type, and semantic errors, improving agent accuracy and reducing lint errors
Git Commit Message Generation: Draft commit messages using the agent directly from the source control pane with a single click. Learn more →
Repetitive Tool Use Detection: Agent now detects repetitive tool usage patterns and prompts users to continue or stop, optimizing credit consumption
Unified Credits System improvements: Unified credits system with Auto agent capabilities enhancements and bug fixes. This feature provides users a single credit pool and streamlined usage tracking. Learn more →
This release addresses critical security vulnerabilities and bug fixes.
V8 Engine Security: Merge Chromium 138.0.7204.251 to address CVE-2025-10585, a zero-day vulnerability addressing type confusion issue in V8 JavaScript and WebAssembly engine.
Command Execution Security: Fixed vulnerability on PowerShell that could allow malicious commands to execute without user confirmation
License Access: Fixed render issue in License page
This release brings Auto, our new agent, enhanced usage tracking, and editor improvements to elevate your development experience.
Note: These features are rolling out gradually between now and October 1st, and users will be migrated to a single pool of credits and new limits. Your limits will reset to the new monthly plan limits once migrated.
Auto: Added Auto to the model options. Auto is an agent that uses a mix of different frontier models such as Sonnet 4 combined with specialized models, and optimization techniques such as intent detection, caching, and more
Unified Limits: Support for new paid plans with unified limits and fractional credit consumption
Usage Dashboard: Support to view usage based on single Kiro credit pool
Usage Meter: Add credit consumption status bar item to allow easier usage tracking
Editor Upgrade: Upgraded editor to CodeOSS 1.103.2
Account Management: Enable Kiro account deletion for BuilderID
Authentication: Improvements to login reliability and logout flow for better signing experience
UI Improvements: Hide trust command UI on command cancellation
This release includes editor performance improvements, enhanced reliability, and bug fixes to enhance your development experience.
Code OSS v1.100.3 Upgrade: Updated to Code OSS v1.100.3 that adds improved stability and performance improvements
Faster Response Times: Optimized request handling makes interactions more efficient and improves performance
Improved Session Management: Enhanced backend processing reduces interruptions and allows for longer continuous work sessions
Enhanced Tool Call Recovery: When tool invocations result in repeated failures, Kiro now prompts for your intervention instead of continuing indefinitely, protecting your usage limits and preventing loops
Enhanced Security Patterns: Expanded detection of dangerous shell commands with improved pattern recognition. Risky commands require manual review unless you explicitly trust them. Learn more about security patterns →
Model Update: Removed Claude Sonnet 3.7 from the model selector and set Claude Sonnet 4 as the default for all users. Sonnet 4 delivers improved performance and capabilities across all interactions.
Git Repository Initialization: Fixed issue that prevented Git setup for new projects without existing repositories
Model Selection Persistence: Fixed chat model selection not being saved when restarting Kiro IDE
This release brings key improvements to accessibility, account management, and overall platform reliability.
Kiro is now accessible to more developers through waitlist codes. If you have an waitlist code, you can register and start building with AI-powered development workflows alongside our growing community.
Paid plans are now live, giving you access to higher usage limits. Choose the plan that fits your development needs and scale your AI-powered workflows.
Introducing comprehensive usage tracking to help you monitor your Kiro consumption. The new billing dashboard displays real-time spec and vibe request usage, plan management options, and overage controls for paid plans.
Kiro, a new agentic IDE that helps you do your best work with spec-driven development.
Structured artifacts that formalize the development process for complex features in your application. Learn more
Set up event-driven automation like updating documentation or generating tests on events such as file save. Learn more
Define steering files to guide agent behaviors. Learn more
Build features from chat. Turn on Autopilot mode for hands-off execution or approve each change manually. Learn more
Integrate with your favorite tools and services. Learn more
