Decisions, Not Sentences: An Isometric Story of Contrastive Language Models
CLM-8B makes decisions without writing a word: a frozen Qwen3-8B reads the situation once, two small heads place it in a shared space, and the answer is the nearest of a set of action vectors computed in advance. A 23-step isometric explainer shows how that works, where the trick comes from, why it is cheap, and where it breaks.