Loading tool details...
Kiro
8.5/10
"Specs first, then code that matches—Kiro's structured approach with Bugfix Specs and Hooks is ideal for production teams."
Amazon's spec-driven AI IDE with unified credit system, Bugfix Specs, Hooks, and Claude Opus 4.6—turning vibe coding into viable code.
Best for:Enterprise DevelopersProfessional TeamsAWS UsersArchitecture-focused Teams
Free (50 credits) / Pro $20/mo / Pro+ $40/mo / Power $200/mo
Verified Tool
About Kiro
Kiro is Amazon's AI-powered IDE that brings structure to AI coding through spec-driven development. Unlike "vibe coding" tools that generate code from loose prompts, Kiro transforms natural language into structured requirements, architectural designs backed by best practices, and discrete implementation tasks.
Kiro now uses a unified credit system (replacing the earlier vibe/spec request split). Flexible spec creation lets developers choose between "Requirements-first" or "Tech Design-first" approaches. New Bugfix Specs enable surgical changes to existing codebases with documented fixes.
Auto-generated specs include structured user stories, architectural diagrams (Mermaid.js), data flow diagrams, database schemas, API stubs, and task lists linked to requirements. Hooks provide event-driven automations triggered by file changes—automatically updating unit tests, documentation, or running security scans on save.
Powered by Claude Sonnet 4.0 (with 3.7 fallback), with access to Sonnet 4.5, Haiku 4.5, Opus 4.5, and Opus 4.6. Built on Code OSS (VS Code foundation) for familiar extensions and themes. Free tier includes 50 credits/month. Pro ($20/mo) offers 1,000 credits. Pro+ ($40/mo) provides 2,000 credits. Power ($200/mo) delivers 10,000 credits. Overage at $0.04/credit on paid plans.
Key Features
Spec-Driven Development (Requirements + Design)
Bugfix Specs (Surgical Changes)
Hooks (Event-Driven Automations)
Unified Credit System
Claude Opus 4.6 / Sonnet 4.5 Access
Mermaid.js Architecture Diagrams
VS Code Extension Compatibility
The Good
- Spec-driven ensures code matches requirements
- Bugfix Specs for precise changes
- Hooks automate tests and docs on save
- Familiar VS Code environment
The Not-So-Good
- 50 free credits consumed very quickly
- Pro 1,000 credits can limit heavy users
- Newer ecosystem than Cursor/Copilot
Editor's Review
Editor's Review (February 2026)
Kiro's evolution to a unified credit system and new spec types (Bugfix, Requirements-first, Tech Design-first) shows Amazon is listening to developer feedback.
What We Love:
• Unified credit system replaces the confusing vibe/spec request split
• Bugfix Specs enable surgical, documented changes to existing codebases
• Hooks automate validation, testing, and security scanning on file save
• Flexible spec creation: Requirements-first OR Tech Design-first approach
• Claude Opus 4.6 available for the most complex tasks
What Could Be Better:
• Free tier (50 credits) gets consumed very quickly with active use
• Pro at $20/mo gives 1,000 credits—heavy users report burning through these fast
• Still in early stages compared to Cursor and Copilot ecosystems
Who Should Use It:
Enterprise developers and teams who need reliable, spec-compliant code rather than quick prototypes. The Bugfix Specs feature is invaluable for maintaining large codebases. AWS teams get natural ecosystem integration.
Frequently Asked Questions
Q:What is spec-driven development in Kiro?
Kiro generates detailed specifications from natural language prompts—including user stories, architecture diagrams (Mermaid.js), database schemas, and task lists—before generating code. Choose between Requirements-first or Tech Design-first approaches.
Q:What are Bugfix Specs?
Bugfix Specs are a new spec type for making surgical changes to existing codebases. They document the bug, proposed fix, and verification steps, ensuring changes are precise and well-documented.
Q:How does Kiro's credit system work?
Kiro uses a unified credit pool: Free (50/mo), Pro $20/mo (1,000), Pro+ $40/mo (2,000), Power $200/mo (10,000). Overage on paid plans is $0.04/credit. New users may get 500 bonus credits for 30 days.
Q:What are Hooks in Kiro?
Hooks are event-driven automations triggered by file changes. They can automatically update unit tests when code changes, regenerate documentation, run security scans, and apply formatting—automating your code review pipeline.
Tool Information
Pricing ModelFreemium
Starting PriceFree (50 credits) / Pro $20/mo / Pro+ $40/mo / Power $200/mo
CategoryCoding Assistants
Last UpdatedFeb 2026
