Kiro

What is Kiro?

Kiro is an agentic IDE built by AWS, powered by Claude via Amazon Bedrock. Launched in mid-2025, it rapidly became one of the most talked-about AI coding tools of 2026 — and effectively AWS's successor to Amazon Q Developer for IDE-based development. Its defining idea is spec-driven development.

Spec-Driven Development

The core differentiator: instead of jumping from prompt to code, Kiro first generates requirements documents, design artifacts, and structured task lists. Only after you review and approve the plan does it write code. Where vibe-coding tools generate code immediately from natural language, Kiro requires a machine-parseable specification before any code is written — bringing engineering rigor and traceability to agentic development.

Key Features

Agent Hooks — Event-driven automations that fire without manual prompting: save a React component and the test file updates automatically; modify an API endpoint and the README refreshes; trigger a pre-commit and a security scan runs.

Native MCP Support — Kiro natively supports the Model Context Protocol, connecting the AI directly to AWS services (Bedrock, Lambda, DynamoDB) and third-party tools (Jira, GitHub, Slack).

Steering Files — Project-level guidance files that keep agents aligned with your conventions and architecture across sessions.

Built on VS Code — Familiar Code OSS foundation, so the editor itself is immediately comfortable.

Pricing

Free tier with 50 interactions/month; Pro at $19/month. Note the pricing distinction: spec-mode requests cost $0.20 per credit while vibe-mode requests cost $0.04 — a 5x premium for Kiro's signature feature over basic chat mode.

How It Differs

The common 2026 pattern: Kiro for structured feature planning on complex projects, Cursor for rapid iteration, Claude Code for deep architectural reasoning. Spec-driven approaches shine when requirements are ambiguous, teams are distributed, or compliance demands traceability. For solo developers on well-understood problems, the planning overhead may not pay off.

Bottom Line

Kiro is the standout choice when engineering rigor matters more than raw speed — distributed teams, complex features, and regulated environments benefit most from its plan-first approach. If you're on AWS and value traceable, spec-driven development, Kiro is well worth evaluating.