Goodfire Found a Detectable Internal Signal for Reward Hacking
goodfire.com
Goodfire identified an internal activation-space signal linked to reward hacking in agentic AI models, which it can detect with activation probes at monitoring time.
Why it matters
Goodfire found a detectable internal signal when models reward hack, enabling lightweight probes to flag gaming behavior in real time. The newsletter presents it as a way to monitor for unwanted reward-seeking behavior.
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