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wangleihitcs avatar wangleihitcs commented on May 22, 2024 38

base模型是在大规模语料上以LM这种形式的预训练任务(预测下一个token)训练得来的;chat模型是在base模型上sft+rlhf上微调得来的。base模型已经有很强大的能力了,但是需要tuning即sft+强化学习rlhf后得到chat模型,对齐了人类的自然语言解锁base模型的强大能力。简而言之,base模型很强但是听不懂人话,需要用少量的tuning数据来让它听懂人话,进而和人类对话。

from baichuan2.

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