UC Berkeley paper finds fine-tuning datasets can carry hidden harmful behaviors
Overview
A UC Berkeley paper reports that a pipeline found 6,575 small datasets across 8 behaviors that look like normal training data but raise a chosen behavior in a model.
According to the source, 72% of these datasets also induced the behavior in all 5 other models tested, including one 8 times larger. The paper says ML researchers guessed the side effect correctly in 63% of trials, versus 50% by chance. It recommends screening fine-tuning data with behavior evals or a frontier LLM auditor.
Written by AI from the articles below · updated Nov 6, 4:16 PM ET
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Rohan Paul@rohanpaul_aiXUC Berkeley paper finds fine-tuning data can carry hidden harmful behaviorsAIA UC Berkeley paper reports a pipeline that found 6,575 small datasets across 8 behaviors that look like normal training data but raise a chosen behavior. The source says 72% of these datasets also induced the behavior in all 5 other models tested, including one 8 times larger. It adds that ML researchers guessed the side effect correctly in 63% of trials, versus 50% by chance, and recommends screening fine-tuning data with behavior evals or a frontier LLM auditor.

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