Import AI 466: The bitter lesson for robotics, AIs complete week-long programming tasks; and OpenAI's accidental AI hacker

Epoch and METR released the MirrorCode benchmark, testing AI's ability to reimplement complete software with CLI access alone; 17 of 25 target programs had at least one perfect run, and Claude Opus 4.7 completed a task humans estimated at 2-17 weeks in 14 hours with $251 in inference costs.