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{{Infobox company
| name = Perplexity AI, Inc.
| logo = Perplexity AI logo.svg
| logo_size = 280px
| image = Perplexity AI What is Vilnius_screenshot.webp
| image_size = 270px
| image_caption = 2025 年 Perplexity 的截圖
| type = [[私人公司|私人]]
| industry = [[人工智慧]]
| services = [[搜尋引擎]]
| homepage = {{URL|https://www.perplexity.ai}}
| founded = 2022年8月
| key_people = Aravind Srinivas ([[執行長|CEO]])
| founders = {{Unbulleted list| Aravind Srinivas | Andy Konwinski| Denis Yarats| Johnny Ho }}
| num_employees = 55<ref name=":1" />
| num_employees_year = 2024
| location = [[美國]][[舊金山]]
}}
{{About|人工智能搜索引擎|信息论概念|困惑度}}

'''Perplexity ''' 是一個由[[聊天機器人|AI 聊天機器人]]驅動的研究和對話[[搜索引擎]]，通過[[自然語言生成|自然語言預測文本]]來回答查詢。Perplexity 於 2022 年推出，使用來自[[全球資訊網|網路]]的資源生成答案，並在回應文本中引用連結。<ref name=":02">{{cite news|last=Singh|first=Shubham|date=2024-01-06|title=Perplexity AI raises $73.6M in funding round led by Nvidia, Bezos, now valued at $522M|url=https://www.businesstoday.in/entrepreneurship/start-up/story/perplexity-ai-raises-736m-in-funding-round-led-by-nvidia-bezos-now-valued-at-522m-412130-2024-01-06|access-date=2024-01-15|website=[[Business Today (India)|Business Today]]|archive-date=2024-08-20|archive-url=https://web.archive.org/web/20240820230917/https://www.businesstoday.in/entrepreneurship/start-up/story/perplexity-ai-raises-736m-in-funding-round-led-by-nvidia-bezos-now-valued-at-522m-412130-2024-01-06|dead-url=no}}</ref> Perplexity 採取[[免費增值|增值服務]]模式運作；免費版本使用該公司獨立的[[大型語言模型|大型語言模型(LLM)]]，此模型包含[[自然語言處理|自然語言處理(NLP)]]功能，而付費版本 Perplexity Pro 和 Perplexity Max 則可訪問 [[GPT-5]]、[[Claude (语言模型)|Claude Sonnet 4]]、[[LLaMA#Llama 3|Llama 3]]、[[Grok|Grok-4]]以及實驗性 Perplexity 模型。<ref name=":42">{{Cite news|date=2024-01-04|title=Startup Perplexity Challenges Google With AI Search|url=https://www.wsj.com/podcasts/tech-news-briefing/tnb-tech-minute-startup-perplexity-challenges-google-with-ai-search/984362d5-a8f0-48b4-8b55-ad7e570a74d2|url-access=subscription|access-date=2024-01-10|website=[[華爾街日報]]|language=en|archive-date=2024-01-10|archive-url=https://web.archive.org/web/20240110082538/https://www.wsj.com/podcasts/tech-news-briefing/tnb-tech-minute-startup-perplexity-challenges-google-with-ai-search/984362d5-a8f0-48b4-8b55-ad7e570a74d2|url-status=live}}</ref><ref name=":02" /><ref name=":1">{{Cite news|last=Ghaffary|first=Shirin|date=2024-04-23|title=AI Search Startup Perplexity Valued at $1 Billion in Funding Round|url=https://www.bloomberg.com/news/articles/2024-04-23/ai-search-startup-perplexity-valued-at-1-billion-in-funding-round|access-date=|work=[[彭博新聞]]|language=|archive-date=2024-04-24|archive-url=https://web.archive.org/web/20240424015839/https://www.bloomberg.com/news/articles/2024-04-23/ai-search-startup-perplexity-valued-at-1-billion-in-funding-round|url-status=live}}</ref> 截至 2025 年 9 月，Perplexity 的月活躍使用者數已達 3000 萬。<ref>{{cite web |title=50+ Perplexity AI User Statistics and Market Reach |url=https://www.zebracat.ai/post/perplexity-ai-user-statistics |website=zebracat.ai |date=2025-09-01 |language=en |last=Baumgartner |first=Michael |last2= |first2= |url-status=live |archive-url= |archive-date= |access-date=2025-10-19 |quote=Perplexity AI has approximately 30 million monthly active users.}}</ref>

== 歷史 ==
Perplexity 於 2022 年由 Aravind Srinivas、Denis Yarats、Johnny Ho 和 Andy Konwinski 創立，這些創始人皆擁有後端系統、AI 和機器學習的背景。

* [[首席技术官|CTO]] Yarats曾是[[Meta Platforms|Meta]]的AI研究科學家
* [[首席执行官|CEO]] Srinivas 則在[[OpenAI]]擔任AI研究員
* CSO Ho曾在[[Quora]]擔任工程師，隨後成為華爾街的量化交易員
* Konwinski是[[Databricks]]創始團隊的一員。<ref>{{cite news |date=2023-04-04 |title=AI-powered search engine Perplexity AI lands $26M, launches iOS app |url=https://techcrunch.com/2023/04/04/ai-powered-search-engine-perplexity-ai-lands-26m-launches-ios-app/ |website=[[TechCrunch]] |access-date=2024-05-05 |archive-date=2024-03-05 |archive-url=https://web.archive.org/web/20240305054604/https://techcrunch.com/2023/04/04/ai-powered-search-engine-perplexity-ai-lands-26m-launches-ios-app/ |url-status=live }}</ref>

2024年7月，Perplexity宣佈推出新的出版商計劃，與合作夥伴分享[[廣告收入]]。<ref>{{Cite web |title=Perplexity is cutting checks to publishers following plagiarism accusations |url=https://www.theverge.com/2024/7/30/24208979/perplexity-publishers-program-ad-revenue-sharing-ai-time-fortune-der-spiegel |website=The Verge |date=2024-07-30 |language=en |last=Robison |first=Kylie |access-date=2024-08-04 |archive-date=2025-01-29 |archive-url=https://web.archive.org/web/20250129005833/https://www.theverge.com/2024/7/30/24208979/perplexity-publishers-program-ad-revenue-sharing-ai-time-fortune-der-spiegel |dead-url=no }}</ref>

{{As of|2025|9}}，Perplexity AI共募資約15億美元，最新估值達200億美元。<ref>{{Cite web |title=Perplexity reportedly raised $200M at $20B valuation |url=https://techcrunch.com/2025/09/10/perplexity-reportedly-raised-200m-at-20b-valuation/ |website=TechCrunch |date=2025-09-11 |language=en-US |last=Temkin |first=Marina |access-date=2025-10-19}}</ref>

=== 著名投資者 ===

* [[杰夫·贝索斯]]
* [[英伟达]]
* [[Databricks]]
* [[Bessemer Venture Partners]]
* [[苏珊·沃西基]]
* [[傑夫·迪恩]]
* [[杨立昆]]
* [[安德烈·卡帕斯]]
* [[奈特·弗里德曼]]
* [[Garry Tan|陳嘉興]]<ref name="wiggers">{{cite news |last=Wiggers |first=Kyle |date=2024-01-04 |title=AI-powered search engine Perplexity AI, now valued at $520M, raises $73.6M |url=https://techcrunch.com/2024/01/04/ai-powered-search-engine-perplexity-ai-now-valued-at-520m-raises-70m/ |access-date=2024-01-07 |website=[[TechCrunch]] |language=en-US |archive-date=2024-01-07 |archive-url=https://web.archive.org/web/20240107015233/https://techcrunch.com/2024/01/04/ai-powered-search-engine-perplexity-ai-now-valued-at-520m-raises-70m/ |url-status=live}}</ref><ref name=":3">{{Cite web |title=Announcing our series A funding round and mobile app launch |url=https://www.perplexity.ai/hub/blog/announcing-our-series-a-funding-round-and-mobile-app-launch |website=Perplexity.ai |date=2023-04-28 |last= |first= |url-status=live |archive-url=https://web.archive.org/web/20240422160036/https://www.perplexity.ai/hub/blog/announcing-our-series-a-funding-round-and-mobile-app-launch |archive-date=2024-04-22 |access-date=2024-04-24}}</ref><ref name=":1" />

== 功能 ==
Perplexity的主要產品是其搜尋引擎，該引擎依賴於[[自然語言處理]]<ref name=":0">{{Cite web|title=AI-powered search engine Perplexity AI, now valued at $520M, raises $73.6M|url=https://techcrunch.com/2024/01/04/ai-powered-search-engine-perplexity-ai-now-valued-at-520m-raises-70m/|website=TechCrunch|date=2024-01-04|language=en-US|last=Wiggers|first=Kyle|access-date=2024-08-17|archive-date=2024-01-07|archive-url=https://web.archive.org/web/20240107015233/https://techcrunch.com/2024/01/04/ai-powered-search-engine-perplexity-ai-now-valued-at-520m-raises-70m/|dead-url=no}}</ref>。它利用使用者查詢的上下文來提供個性化的搜尋結果。Perplexity 會對搜尋結果進行摘要並產生帶有內嵌引用的文字內容<ref name=":0" />。它允許使用者在相同的上下文中提出後續問題。

Perplexity 採用[[Freemium|免費增值]]模式，提供基本的搜尋功能和所有搜尋模式免費使用。焦点（{{Langx|en|Focus|label=none}}）功能允許使用者將搜尋限制在 [[Reddit]]、[[YouTube]]、[[WolframAlpha]]，或限制在學術（用於搜尋研究論文）、寫作（禁用 LLM 的網路訪問）。<ref>{{Cite web|title="What is Search Focus?"|url=https://www.perplexity.ai/hub/faq/what-is-search-focus|website=Perplexity.ai}}</ref>

Perplexity的付費模式涵蓋免費、個人和企業等級，滿足不同使用者的需求。免費的「標準版」適合一般用戶，提供基礎的AI搜尋、問答和資訊來源引用，但使用進階模型（如GPT-4、Claude）的次數和檔案上傳數量有限。針對需要更強大功能的使用者，個人付費方案包括每月20美元或每年200美元的「Pro版」，以及每月50美元的「Max版」。Pro版提供有限使用先進AI模型、Comet Plus內容、檔案上傳、API額度和優先支援。Max版則在此基礎上，進一步提供不受限制的Labs功能（可用於建立儀表板和應用程式）、更頂級的AI模型（如OpenAI o3-pro和Claude Opus 4），以及搶先體驗最新產品（例如Comet瀏覽器）的權利。此外，企業用戶可選擇客製化的「企業版」，提供團隊管理、資安保護、內部知識庫整合等功能。整體來說，Perplexity的付費模式透過分級來提供更強大的AI能力、更豐富的功能和更高額度的使用量，以滿足從輕度使用者到專業人士和企業組織的多元需求。<ref>{{Cite web |title=What is Perplexity Pro? {{!}} Perplexity Help Center |url=https://www.perplexity.ai/help-center/en/articles/10352901-what-is-perplexity-pro |website=www.perplexity.ai |language=en |access-date=2025-10-19}}</ref>

{| class="wikitable" style="width:800px"
!版本
!服務
|-
|Free
|
* 提供基本的搜尋功能和所有模式。

* 使用該公司獨立的[[大型語言模型]]（LLM）。

* Focus 功能<ref>{{Cite web |title="What is Search Focus?" |url=https://www.perplexity.ai/hub/faq/what-is-search-focus |website=Perplexity.ai}}</ref>

* Pages 功能<ref>{{cite news|last=David|first=Emilia|date=2024-05-30|title=Perplexity will research and write reports|url=https://www.theverge.com/2024/5/30/24167986/perplexity-ai-research-pages-school-report|access-date=2024-06-24|website=[[The Verge]]|language=en|archive-date=2024-06-20|archive-url=https://web.archive.org/web/20240620005155/https://www.theverge.com/2024/5/30/24167986/perplexity-ai-research-pages-school-report|url-status=live}}</ref>
|-
|Perplexity Pro
|
* 答案中的引用数量增加10倍
* 可使用 Perplexity Labs
* 无限制文件和照片上传
* 对Perplexity Research的扩展访问
* 扩展访问图像生成
* 对视频生成的访问有限
* 一份订阅，即可获得所有最新的 AI 模型，包括 GPT-5 和 Claude Sonnet 4
* 专享 Pro 福利及更多特权
* 有限使用先進AI模型
|-
|Perplexity Max
|
* 包含Pro的所有内容
* 优先访问我们的最新产品
* 无限访问Perplexity Labs
* 无限访问Perplexity Research
* 使用高级AI模型，例如OpenAI o3-pro和Anthropic Claude Opus 4.1
* 增强的视频生成访问权限
* 优先支持
|}

== 評價 ==
=== 黃仁勳 ===
2024年2月，[[黃仁勳]]接受[[连线|連線]]雜誌採訪時透露<ref>{{Cite web|title=黃仁勳天天用！Perplexity AI是什麼？盤點科技巨頭最愛AI小幫手－數位時代｜商周|url=https://www.businessweekly.com.tw/business/blog/3015754|website=商業周刊 - 商周.com|date=2024-05-31|language=zh-Hant-TW|access-date=2024-08-17|archive-date=2024-12-12|archive-url=https://web.archive.org/web/20241212073900/https://www.businessweekly.com.tw/business/blog/3015754|dead-url=no}}</ref>，<blockquote>「我一直在使用Perplexity，不過也很喜歡[[ChatGPT]]，我幾乎每天都會使用這兩款AI工具。」</blockquote>

=== 富比士 ===
2024 年 6 月，[[福布斯|富比士]]公開批評 Perplexity 使用其內容。根據富比士的說法，Perplexity 發布了一篇主要抄襲自富比士專有文章的報導，未能適當地提及或明顯引用富比士。作為回應，Srinivas 表示該功能還存在一些「粗糙的邊緣」，並接受了反饋，但他堅持認為 Perplexity 只是整合資訊而非抄襲資訊。<ref name="APForbes2">{{cite news|last1=O'Brien|first1=Matt|date=15 June 2024|title=AI startup Perplexity wants to upend search business. News outlet Forbes says it's ripping them off|url=https://apnews.com/article/perplexity-ai-search-engine-forbes-f307cb607f0db871b05f843a3f744340|access-date=20 June 2024|website=[[Associated Press]]|archive-date=20 June 2024|archive-url=https://web.archive.org/web/20240620100507/https://apnews.com/article/perplexity-ai-search-engine-forbes-f307cb607f0db871b05f843a3f744340|url-status=live}}</ref><ref>{{cite news|last1=Lane|first1=Randall|title=Why Perplexity's Cynical Theft Represents Everything That Could Go Wrong With AI|url=https://www.forbes.com/sites/randalllane/2024/06/11/why-perplexitys-cynical-theft-represents-everything-that-could-go-wrong-with-ai/|website=[[Forbes]]|access-date=20 June 2024|date=11 June 2024}}</ref>

=== 連線雜誌 ===
同月，[[连线|連線]]雜誌和網頁開發人員 Robb Knight 的獨立調查發現，Perplexity 未遵守[[robots.txt]] 標準，同時在某些情況下，Perplexity 可能沒有總結實際的新聞文章，而是根據 URL 和搜索引擎中留下的痕跡（例如摘錄和元數據）重建內容，並提供聲稱基於直接訪問相關文本的總結。<ref name=":2" />Perplexity 公開列出了其網路爬蟲的[[IP地址|IP 位址]]範圍和[[用户代理|用戶代理]]字串，但據連線和 Robb Knight 稱，他們使用未公開的 IP 位址和偽造的用戶代理字串來無視 robots.txt。<ref name=":2">{{cite magazine|last1=Mehrotra|first1=Dhruv|last2=Marchman|first2=Tim|date=19 June 2024|title=Perplexity Is a Bullshit Machine|url=https://www.wired.com/story/perplexity-is-a-bullshit-machine/|magazine=[[Wired (magazine)|Wired]]|archive-url=https://web.archive.org/web/20240620000351/https://www.wired.com/story/perplexity-is-a-bullshit-machine/|archive-date=20 June 2024|access-date=20 June 2024|url-status=live}}</ref><ref>{{cite web|title=Perplexity AI Is Lying about Their User Agent|url=https://rknight.me/blog/perplexity-ai-is-lying-about-its-user-agent/|website=Robb Knight|date=15 June 2024|url-status=live|archive-url=https://web.archive.org/web/20240620100509/https://rknight.me/blog/perplexity-ai-is-lying-about-its-user-agent/|archive-date=20 June 2024|access-date=20 June 2024}}</ref>

Srinivas 在一次電話採訪中回應說<ref name=":5">{{cite news|last=Sullivan|first=Mark|date=June 21, 2024|title=Perplexity CEO Aravind Srinivas responds to plagiarism and infringement accusations|url=https://www.fastcompany.com/91144894/perplexity-ai-ceo-aravind-srinivas-on-plagiarism-accusations|access-date=June 24, 2024|website=[[Fast Company]]}}</ref>：<blockquote>「Perplexity 沒有無視機器人排除協議（Robot Exclusions Protocol）……我們不僅依賴自己的網路爬蟲，也依賴第三方爬蟲。被連線識別出的網路爬蟲屬於第三方供應商。」 </blockquote>連線還指出，在某些情況下，Perplexity 可能沒有總結實際的新聞文章，而是根據 URL 和搜索引擎中留下的痕跡（例如摘錄和元數據）重建內容，並提供聲稱基於直接訪問相關文本的總結。<ref name=":22">{{cite magazine|last1=Mehrotra|first1=Dhruv|last2=Marchman|first2=Tim|date=19 June 2024|title=Perplexity Is a Bullshit Machine|url=https://www.wired.com/story/perplexity-is-a-bullshit-machine/|magazine=[[Wired (magazine)|Wired]]|archive-url=https://web.archive.org/web/20240620000351/https://www.wired.com/story/perplexity-is-a-bullshit-machine/|archive-date=20 June 2024|access-date=20 June 2024|url-status=live}}</ref>當被問及 Perplexity 是否會停止使用第三方抓取連線的內容時，Srinivas 回應說：「這很複雜」。<ref name=":5" />
=== 亞馬遜 ===
[[亚马逊云计算服务|亞馬遜雲端運算服務]]，作為 Perplexity [[網路爬蟲]]的主機服務商，其[[服務條款]]中包含禁止用戶無視 robots.txt 標準的條款。亞馬遜開始對該公司的[[Amazon EC2|亞馬遜彈性雲端運算]]使用情況進行「例行」調查。<ref>{{Cite news|last=Mehrotra|first=Dhruv|last2=Couts|first2=Andrew|date=June 27, 2024|title=Amazon Is Investigating Perplexity Over Claims of Scraping Abuse|url=https://www.wired.com/story/aws-perplexity-bot-scraping-investigation/|access-date=July 3, 2024|work=[[Wired (magazine)|Wired]]|archive-date=2025-01-30|archive-url=https://web.archive.org/web/20250130140251/https://www.wired.com/story/aws-perplexity-bot-scraping-investigation/|dead-url=no}}</ref>

==參考資料==
{{reflist|30em}}
== 外部連結 ==
* [https://www.perplexity.ai/ 官方網站] {{Wayback|url=https://www.perplexity.ai/ |date=20230921200518 }}
{{wikiversity|Search Engines}}

{{生成式人工智能}}
{{生成式人工智慧聊天機器人}}

[[Category:人工智慧公司]]
[[Category:聊天机器人]]
[[Category:人工智慧搜寻引擎]]

Perplexity - 版本历史

2026年3月28日 (六) 20:26 imported>Houjianyou