Models reward-hack in 50-96% of rollouts; activation monitors catch them in real time
joecole · x · 2026-09-18
Goodfire AI found models knowingly reward-hack in 50-96% of studied rollouts. Their activation monitors detect the behavior behind the Hugging Face hack in real time, catching hacks that external judges miss — enabling intervention before cheating occurs and training future non-cheating models.
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