AWS launches Kiro agentic IDE: generally available, replaces Amazon Q Developer, spec-driven development, free tier with 50/mo interactions

Amazon/Kiro

AWS made Kiro generally available in March 2026 (after early-access phase for startups). Kiro is an agentic IDE that inverts traditional coding workflows: the specification becomes the source of truth and code becomes a build artifact. The tool operates on Code OSS (open-source VS Code base) and routes reasoning-heavy tasks to Claude Sonnet 4.5 and mechanical work to Amazon Nova. Pricing: free tier (50 interactions/month), Pro ($19/mo, 1k interactions), Pro+ ($39/mo, 3k interactions).

• Spec-first development: spec is source of truth, code is derived artifact—inverting traditional workflows.
• Agentic loop: plans, writes files, runs tests, iterates autonomously within user-set constraints.
• Dual-model routing: Claude Sonnet for reasoning, Amazon Nova for throughput via AWS Bedrock.
• Launched internationally May 7, 2026; free tier + $19/$39 paid tiers with different monthly interaction limits.