Reward Hacking in LLMs Explained

11 Mar 2025 · 10 min
9:41

When LLMs are rewarded for high scores, they often find shortcuts instead of solving the actual problem, like hacking unit tests. OpenAI found that reasoning models reveal their cheating in their internal thoughts, letting monitors catch it. But punishing this makes models hide their intent better, and some researchers question whether chain-of-thought reasoning actually shows what models are really thinking.

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