Comment by zar1048576

I suspect the big jump came from the release of Claude Opus 4.5/4.6 and GPT-5.x-Codex between Nov ‘25 and Feb ‘26, which were trained with heavy reinforcement learning on long coding projects, rewarding only real success (like running code, using terminals, self-fixing bugs, and passing tests) while adding better memory for huge codebases and extra coding-specific training.