Kiro
Agentic AI development tool from AWS that turns prompts into specs and implements them with parallel coding agents.
Kiro is an agentic AI development tool built and operated by AWS. Kiro is used to turn a prompt into requirements, a design and a task list, then implement the tasks with parallel agents and check the result with property-based tests. Kiro runs as an IDE, a command-line tool, a web app, a mobile app and Kiro Crew.
Best for Developers and teams who want AI coding agents that work from written specifications and verified requirements, especially on large codebases.
- Platforms
- Web, MCP
- Pricing model
- Freemium
- Free plan
- Yes
- Made by
- AWS
- Added
Last verified: . Information taken from kiro.dev.
What is Kiro?
Kiro is an AI coding agent and development environment centred on spec-driven development. Instead of generating code straight from a chat message, it first writes requirements, an architectural design and sequenced tasks, checks the requirements for contradictions and gaps, and only then implements the work, running agents in parallel either locally or in the cloud. Behaviour is tested with property-based tests that assert rules across all inputs. The agent is available in an IDE based on Code OSS, which imports VS Code settings and Open VSX extensions, as well as in a CLI that can run headless in CI/CD, a browser interface, a mobile app and the Kiro Crew workspace. Users pick a model from Anthropic, OpenAI or open-weight families, or leave the choice to Auto. Plans are credit based, with a free tier, and enterprise controls such as SSO are offered.
Key Features
Spec-Driven Workflow
Converts a prompt into requirements, a design document and an ordered task list before any code is written.
Requirement Checking
Examines requirements for contradictions and missing cases using automated reasoning techniques.
Property-Based Tests
Generates tests that assert rules which must hold for every input, similar to fuzz testing.
Parallel Agents
Implements tasks with several agents at once, on your own machine or in isolated cloud sessions.
Model Choice
Lets you select Claude, GPT or open-weight models per task, or use Auto to balance quality, latency and cost.
Open Standards Support
Works with the Agent Client Protocol, AGENTS.md, skills files and MCP servers for bringing in outside tools and context.
Screenshots
Use Cases
- Feature Development
- Write a short description of a feature and let the agent plan and implement it against a spec.
- Bug Fixing
- Use a bugfix spec to capture the faulty behaviour and the conditions a fix must satisfy.
- Pull Request Review in CI
- Run the headless CLI in a pipeline to review changes and repair failures without an editor.
- Large Codebase Changes
- Split a cross-cutting change into tasks handled by parallel agents.
- Infrastructure Code
- Draft and adjust Terraform modules or container setups with agent help.
Things to know
- Usage is counted in credits
- Every prompt, spec refinement, task run and hook execution consumes credits, and models draw credits at different rates.
- One subscription per developer
- Subscriptions cannot be shared; each team member needs their own.
- Third-party harnesses are not allowed
- Routing requests through outside automation harnesses rather than Kiro's own interfaces is not permitted under the subscription.
- Model availability varies
- Not every premium model is offered in all countries or regions.
FAQs
What is Kiro?
Kiro is an agentic AI coding tool from AWS that turns prompts into specifications and implements them, available as an IDE, CLI, web interface, mobile app and Kiro Crew.
Is Kiro free?
Yes, Kiro has a free tier with 50 credits that can use Claude Sonnet 4.5 plus several open-weight models, within rate limits. Paid plans add more credits and premium models.
How much does Kiro cost?
Kiro: a free plan is available. Paid plan rates are published on kiro.dev. Check the official pricing page for current amounts.
What is spec-driven development in Kiro?
In Kiro, spec-driven development means the agent first produces requirements, a design and tasks, and then implements them, so decisions are documented rather than buried in a chat.
Which programming languages does Kiro support?
Kiro supports commonly used languages including TypeScript, JavaScript, Python, Go, Rust, Java, Kotlin, C#, C++, PHP, Ruby and SQL, among others.
Who makes Kiro?
Kiro is built and operated by AWS.
Do unused Kiro credits roll over?
No. Kiro's plan credits are wiped and renewed when a new billing month begins, while purchased add-on credits carry over and expire after 12 months.
Can I import VS Code settings into Kiro?
Yes. The Kiro IDE is based on Code OSS and can bring over your VS Code settings and themes, along with plugins compatible with Open VSX, during onboarding.
Who it's for
- Software developers
- Engineering teams
- Startups
- Cloud engineers
- Enterprises
Comments
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