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      <title>拆解 LLM 底层逻辑 (二)：从预训练到 RLHF 的炼丹之路</title>
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      <description>我们拿到手的 ChatGPT 或 Claude，是一个举止得体、对答如流的“AI 助理”。但在它成为助理之前，它只是一个贪婪吞噬了全人类互联网文本的狂暴巨兽（Base Model）。</description>
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