Weight-Space Programming: how GPT-6 Astra edited Qwen's weights and took MATH-500 from 7.9% to 48.1%

MIT CSAIL's weight-space programming: GPT-6 Astra edited 0.016% of Qwen3.5-0.8B's weights with no gradients and lifted MATH-500 from 7.9% to 48.1%. How it works.