Kiro

Kiro is an agentic AI development environment from AWS that moves developers beyond plain AI coding: it turns a prompt into an executable spec, implements that spec with parallel agents, and validates the result before the code ships. It runs as a desktop IDE, a terminal CLI, a browser-based web app and Kiro Crew, an open-source development workspace that keeps working across sessions.

The centre of the product is spec-driven development. Instead of asking for code directly, you describe your intent and Kiro produces requirements, architectural designs and sequenced tasks, then implements them. Because the reasoning behind each decision is written down, complex work lands in fewer attempts and the outcome stays reviewable by a team. Kiro also inspects the requirements themselves for contradictions and gaps before any code is written, using automated reasoning techniques.

Correctness is the second pillar. Property-based tests assert rules that must hold across all inputs instead of checking a few examples, so they surface the edge cases that ordinary unit tests pass over. Agents run those checks alongside implementation and feed failures back into the session.

For larger work Kiro runs parallel agents locally or in cloud sandboxes, and cloud sessions continue while your laptop is closed. Agent hooks run recurring jobs such as tests, documentation and linting on your triggers, steering files keep project conventions in place, MCP servers connect external tools, and Kiro powers add integrations such as Figma, Terraform, Postman, Datadog or Stripe. Multimodal input lets you drop screenshots and diagrams into the conversation as context.

Model choice is deliberately open. Auto selects the best model for each task based on complexity, quality, latency and cost, and you can override it with Anthropic Claude Opus 5, Sonnet 5 or Haiku 4.5, OpenAI's GPT-5.6 tiers, or open-weight models including DeepSeek 3.2, MiniMax M2.5, GLM-5 and Qwen3 Coder Next, each with a published credit multiplier.

Kiro is built on open standards: the agent speaks Agent Client Protocol, respects AGENTS.md, Skills.md and MCP, and the IDE supports Open VSX extensions, themes and imported VS Code settings. Because it is built and operated by AWS, enterprise buyers get IAM and SSO authentication, usage dashboards, cost controls, IP indemnity and governance. Sign-in works with GitHub, Google, AWS Builder ID or AWS IAM Identity Center, and no AWS account is required.