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提示词缓存基础设施:降低LLM成本与延迟

Anthropic前缀缓存实现长提示词90%成本降低和85%延迟降低。OpenAI自动缓存默认启用(节省50%成本)。31%的LLM查询呈现语义相似性——缺乏缓存将造成巨大效率损失。缓存读取仅需$0.30/百万token,而新请求需$3.00/百万token(Anthropic)。多层缓存架构(语义→前缀→推理)最大化节省。

提示词缓存基础设施:降低LLM成本与延迟
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