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English(EN) Temperature 0 Isn't Deterministic: Why Your LLM Still Drifts

LLM 温度 0 的输出可能因 GPU 批处理和浮点数学而异

设置为温度 0 的大型语言模型(LLM),通常会使其变得贪婪和确定性,但对于相同的提示仍然可以产生不同的输出。这种可变性并非来自模型的创造力,而是来自底层的硬件和软件执行。具体来说,浮点算术的非结合性以及 GPU 内核归约顺序的变化(受批处理大小和其他并发请求的影响)会导致 logits 的细微变化。这些微小的数值差异在自回归解码过程中可能会被放大,从而导致输出改变,这种现象被称为缺乏批次不变性。 AI

影响 强调了在 LLM 推理中实现比特级可复现性的挑战,影响了测试和部署。

排序理由 关于 LLM 推理中非确定性的技术解释。[lever_c_demoted from research: ic=1 ai=1.0]

在 dev.to — LLM tag 阅读 →

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LLM 温度 0 的输出可能因 GPU 批处理和浮点数学而异

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  1. dev.to — LLM tag TIER_1 English(EN) · jidonglab ·

    温度 0 并非确定性:为什么你的 LLM 仍然会漂移

    <p>Our CI had one test that failed roughly once a week. Same prompt, same model snapshot, <code>temperature=0</code>, <code>seed</code> pinned, snapshot assertion on the output string. Nothing in the diff touched it.</p> <p>I did what every engineer does with a weekly flake: rera…