This tool applies the large language model (LLM) GPT-3 on academic papers to help with discovery of relevant and related articles, and to extract information from articles like key points, methodology, results, and study type. Because it is based on a LLM, you can query it for information like "what is the main idea of this paper?" You can upload PDFs to the site as well to utilize these features. *This can be problematic when copyrighted materials that are not open access are uploaded.*
Data Sources: Their website says citations are checked against Sematic Scholar but otherwise their sources are unknown. Since large language models are generally trained from materials from the open web, there are questions about data sources meaning that access to paywalled scholarly articles could be limited to material like abstracts on publisher websites. From Elicit's FAQ: "Elicit tends to work best for empirical domains that involve experiments and concrete results."
Cost: There is limited free access, subscriptions start at $10 a month.