Scale AI published SWE Atlas Refactoring Leaderboard, a new benchmark that evaluates agent capabilities of restructuring the code.

> It requires agents to produce twice as much lines of code than SWE Bench Pro.

> Claude Code with Opus 4.7 tops the leaderboard followed by Codex with GPT-5.5, GPT-5.4 and GPT-5.3.

> Refactoring is quite an important task for LLMs to handle as it often boils down to a quite boring engineering work.