Unverified50% confidenceFactExact time
预训练阶段在海量无标注语料上通过自监督学习完成，计算成本极高、周期通常以月计，而指令微调、RLHF对齐等工程阶段可在数周甚至数天内完成
1
Sources
50%
Confidence
Long-term
Relevance
7/21/2026
First Seen
Sources
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