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大语言模型的预训练过程需要数千块高端GPU并行运算数月，耗资通常在数千万到数亿美元之间

9

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90%

Confidence

Long-term

Relevance

6/1/2026

First Seen

Sources

AI训练的三个阶段：预训练、后训练与对齐详解

bilibiliYouni讲AI

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