BookMIA

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Findings

• IC-417RLHF alignment reduces the creativity index of LLMs (GPT, Llama 2, OLMo) by an average of 30.1% at the verbatim level and 8.9% at the semantic level [eval]
• IC-418Matched n-grams in LLM outputs are concentrated in fewer reference documents than in human texts, indicating LLMs draw from a narrower set of sources [eval]