COLM 2026 Paper: Reasoning Fine-Tuning Induces Persistent Latent Policy States in LLMs
hunarbatra · x · 2026-10-06
A COLM 2026 paper, 'Reasoning Fine-Tuning Induces Persistent Latent Policy States,' investigates what actually changes inside an LLM when it is fine-tuned to reason. By examining the internal dynamics of reasoning models, the authors find that reasoning fine-tuning induces persistent latent policy states — the training reshapes the model's internal behavioral strategy, not just its output format. A detailed Twitter thread accompanies the paper.
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