arXiv AI By Uriel Dolev, Idan Schwartz, Yoav Goldberg

Reasoning Models Can Control Their Chains of Thought When They Tell Themselves To

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The paper investigates chain-of-thought (CoT) controllability in reasoning models, noting that traditional evaluations show low controllability when constraints are given in user prompts. It introduces Self‑Instructed CoT Controllability, where constraints are embedded as self‑instructions within the model’s CoT, leading to markedly higher controllability. The study also shows that simple self‑instruction prompts can bootstrap effective control and that this capability can be exploited for monitor evasion, raising concerns about CoT monitorability.

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