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02｜Perplexity，又不止于搜索 上面说到，Perplexity，始于搜索。 但 Perplexity 能做的，已经远远不止于搜索。 很多人用 Perplexity 的最大误区，就是把它当成了“另一个谷歌”。 太浪费了。 深度搜索 Deep Research Perplexity 的深度搜索功能，说实话是跟风推出的。 ②使用上述代码，如果正常的话，则会得到随着主题数k增加而减小的perplexity曲线。 但是我却得到了随主题数增加，一直递增的困惑度曲线图 (在有限的k值范围内)，甚至当我把k值设置到80，100，150时困惑度仍然没有减小，大概如下图。 对于外文信息的检索肯定首选Perplexity，但是中文信息不见得，如果要从国内的AI搜索引擎中选择，秘塔和360推出的纳米AI搜索究竟谁更准确更好用…

困惑度 Perplexity 是衡量语言模型好坏的指标，为了更好地理解其意义，首先有必要回顾熵的概念。 根据信息论与编码的知识，我们知道 熵代表着根据信息的概率分布对其编码所需要的最短平均编码长度。 Entropy 假设离散随机变量 X X 概率分布为 P (x 1) = 1 P (x 2) = 0 3. Perplexity AI 链接： perplexity.ai 国内能用吗： 可以使用，但是注册账户最好有个谷歌邮箱。 特点： Perplexity AI是一款专注于服务科研的对话式AI工具。 Perplexity AI在回答用户问题的过程中会同步给出参考文献，同时引用的文献来源多数是具有一定权威性的期刊文章。 Perplexity大放水，用户下载安装Comet AI浏览器可以领取Perplexity Pro会员啦！ 之前Comet浏览器目前还处在仅向 Perplexity Max 订阅用户以及部分限定邀请码用户开放的阶段（每月订阅费 200 美元）。 最近OpenAI推出了自家的Atlas浏览器。

反正现在来看的话，perplexity ai已经完蛋了。 perplexity何德何能跟坐拥Google search+gemini模型的Google、坐拥X和Grok模型的X AI比啊。论搜索，perplexity的工程师对搜索的理解不可能干的过谷歌。论时效性也不可能干的过X。 从使用角度来说，Google 的deepreasearch效果比perplexity强八百条街，而Grok的deepersearch效果不.

Wikipedia article on perplexity does not give an intuitive meaning for the same 知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、影视.

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