Kiro CLI v1.21.0

Release Context

• This was the 4th Kiro CLI release of 2025 tracked by Havoptic.
• It shipped the same day as Kiro CLI v1.20.2 (November 25, 2025).

Shipped around the same time

Within 3 days of this release, other AI coding tools also shipped:

• Gemini CLI v0.20.0-nightly.20251127.5bed97064 (November 27, 2025)
• Claude Code v2.0.55 (November 26, 2025)
• Gemini CLI v0.18.4 (November 26, 2025)
• Gemini CLI v0.18.3 (November 26, 2025)
• Gemini CLI v0.18.2 (November 26, 2025)

Compare Kiro CLI: vs Claude Code · vs OpenAI Codex CLI · vs Cursor · vs Gemini CLI · vs GitHub Copilot CLI · vs Devin Desktop · vs Antigravity CLI