In “Sparks of Weight-Space Programming,” Takehi, Teoh, Zhang, and Khattab report that frontier models such as GPT-6 Astra can read and edit raw weight strings. Simon Willison says Qwen 3.8 27B on his laptop matches that ability; the paper cites Astra lifting Qwen3.5-0.8B’s MATH-500 from 7.9% to 48.1