Benchmark Kiro vs Codex vs Claude Code

I have the feeling that Kiro is more efficient. Is it just me, or is it real?

I had the feeling that Kiro lasted longer than Codex or Claude Code, but without numbers not even I believed it. So I built a benchmark with the same models, the same exercises and the same prompt across all three tools. The results surprised me, and not in the direction I expected.

September 3, 2026 Â· 23 min Â· 4873 words Â· Miguel Angel Muñoz Sanchez