Agents & InferenceSimon Willison

Qwen 3.8 27B on my laptop can interpret model weights, too

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Summary A

LLMs can read raw floating-point weights of a small policy network and correctly identify what task it was trained for using pure reasoning—no code execution, no tools—and this works not just on frontier models but on a 27B model running locally on a laptop. The practical implication: weight-space inspection is cheap and accessible now, so you can prototype model interpretability and debugging workflows without a frontier API, though the flashier claims about gradient-free weight editing conflate that with code-driven ML work a researcher would do anyway—treat those separately and don't bank on the editing magic.