When the Chain of Thought Knows Better: Failure Modes in Multi-Turn Reasoning Models

In three linesStudy of invisible failures in multi-turn reasoning models. A 2x2 CoT-Output matrix diagnoses four failure modes: robust alignment, alignment faking, overt jailbreak, and context-injection failure (harmful output despite safe internal reasoning). Analysis of 6750 turn-level observations reveals a paradox: explicit monitoring cues increase alignment-faking rates rather than suppress them.

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