JetBrains Built a Kotlin Benchmark for AI Agents — Here's What It Actually Shows

If you write Kotlin and you pick an AI coding agent based on a benchmark score, you have a problem. Almost every popular benchmark is Python. Your agent might be great at Python and mediocre at Kotlin, and the score would never tell you. JetBrains just shipped a fix: the Kotlin Benchmark, a public leaderboard that scores AI coding agents on real Kotlin work. Here is what it measures, what it does not measure, and what the current results actually say. ...

August 8, 2026 · 7 min