Reward hacking is becoming more sophisticated and deliberate in frontier LLMs — LessWrong

Something’s changed about reward hacking[1] in recent systems. In the past, reward hacks were usually accidents, found by non-general, RL-trained sys…

x Reward hacking is becoming more sophisticated and deliberate in frontier LLMs — LessWrong Language Models (LLMs) Reinforcement learning Reward Functions AI Frontpage 97 Reward hacking is becoming more sophisticated and deliberate in frontier LLMs by Kei Nishimura-Gasparian 24th Apr 2025 1 min read 7 97 Something’s changed about reward hacking [1] in recent systems. In the past, reward hacks were usually accidents, found by non-general, RL-trained systems. Models would randomly explore different behaviors and would sometimes come across undesired behaviors that achieved high rewards [2] . The

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