What does a language model know, and where inside it does that knowledge appear?
First we compared what models choose on chess positions. Now we look inside one model, Qwen3-8B, to see how an answer forms layer by layer.
Phase 1 · Chess
Done
Outside the model
Given one chess position, what move does a statistical model expect, what does a language model prefer, and what would a human play?
Illustration. One position, three models, three suggested moves.
What we found: adding a model of human play improved discrimination of controlled move substitutions, from 0.820 to 0.873 ROC-AUC on held-out source games. This is a synthetic assistance task; the language model's held-out evaluation is still pending.
When a language model recalls a text it has memorized, where inside the model does the right next word appear?
Recorded on Qwen3-8B-Base, 316 words of the Gettysburg Address: the median rank of the correct next word goes from 62,391 at the first layer to 1 at the last. Earlier layers are read through a diagnostic projection.
What we see so far: on a memorized text, the correct next word usually becomes the model's top choice only in the last few layers.