最后更新 07-30-2026
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Semantic Scholar
Semantic Scholar 在所有科学领域中检索超过 236 million 篇学术论文，并通过一个免费的界面呈现引用、作者和相关研究。它由艾伦人工智能研究所（Ai2）构建，能够从论文中提取含义，让你无需在多个数据库之间跳转即可浏览摘要、追踪引用链并打开 PDF。
Google Scholar 的索引范围很广，但需要你自己去发现联系。Semantic Scholar 增加了 AI 分类的论文元数据、用于浏览器内批注的 Semantic Reader 测试版，以及面向开发者的公共 Academic Graph API，其中包含 214 million 篇论文和 2.49 billion 条引用。S2AG 和 S2ORC 数据集也作为开放 JSON 档案发布，用于 NLP 研究。
研究生、教职员工、图书管理员和研究工程师将其用于文献综述、引用追踪以及构建学术应用。该 API 是免费的，并提供可选的密钥以获得更高的速率限制，该平台还与 50 多家出版商合作以保持索引的实时更新。
在一个主页上搜索跨所有科学领域的 236,851,843 篇索引论文
语义阅读器测试版在精选论文上添加浏览器内注释和上下文浮层
学术图谱 API 涵盖 214 亿篇论文、2.49 亿次引用以及 7900 万位作者
S2AG 和 S2ORC 数据集作为免费 JSON 存档提供，用于 NLP 和文本挖掘项目
论文推荐根据引用和内容相似度呈现相关研究
与 50 多家出版商和学术协会合作以收录全新学术内容
Indexes over 236 million papers with AI-extracted metadata and citation links
Free API and open S2AG/S2ORC datasets for developer and NLP projects
Semantic Reader beta adds contextual in-browser paper annotations
Backed by the nonprofit Allen Institute for AI with publisher partnerships
API 密钥在已认证端点上的速率限制从每秒 1 个请求开始
语义阅读器仍处于测试阶段且仅限于精选论文
未认证的 API 流量在所有用户之间共享每秒 1,000 个请求的配额池
What is Semantic Scholar?
Semantic Scholar is a free research search engine built by the Allen Institute for AI. Semantic Scholar indexes over 236 million academic papers and uses AI to extract meaning, citations, and connections from scientific literature.
Is Semantic Scholar free to use?
Yes. Semantic Scholar is free for scholars and the public. The Academic Graph API is also free, with optional API keys raising rate limits from the shared 1,000 requests per second cap to 1 request per second per key.
What is Semantic Reader on Semantic Scholar?
Semantic Reader is Semantic Scholar's augmented PDF reader in beta. It adds contextual overlays and accessibility features so you can understand a paper's arguments without leaving the browser.
Does Semantic Scholar have an API?
Yes. Semantic Scholar offers a REST API with Academic Graph, Recommendations, and Datasets services. Developers can query authors, papers, citations, venues, and SPECTER2 embeddings, or download the S2AG bulk dataset.
Who built Semantic Scholar?
Semantic Scholar was launched in 2015 by the Allen Institute for AI (Ai2), a nonprofit founded by Microsoft co-founder Paul Allen. The product team publishes NLP and information retrieval research alongside the search platform.
How many papers does Semantic Scholar index?
Semantic Scholar's homepage reports 236,851,843 searchable papers, while the API documentation cites 214 million papers with 2.49 billion citation links and 79 million author records in the academic graph.