Developer Productivity AI Arena: Open Platform for Benchmarking AI Coding Agents

Very welcome for my work which is automatically generating Java code with JSON-compatible data types.

Codex CLI with the GPT-5-codex model is the current leader over Claude Code and Sonnet 4.5 in the current Java-oriented benchmarks.

The JetBrains contributed benchmarking harness will be soon available in a form that developers can use on their own.