LLMs judge their own outputs higher because they assign better scores to lower-perplexity text, even when the text is not self-generated.
URL https://aclanthology.org/2024.findings-eacl.61
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Self-Preference Bias in LLM-as-a-Judge
LLMs judge their own outputs higher because they assign better scores to lower-perplexity text, even when the text is not self-generated.