These are some of the most popular generative artificial intelligence tools on the web. These tools are changing quickly so not all information below may be accurate. Most of these tools require that you setup an account and offer some kind of premium access for a subscription fee. Typically, the paid version offers access to a more advanced model and additional tools such as ones that give you the ability to parse data from a file.
These are experimental academic research tools that incorporate artificial intelligence to some degree. Many of them lack the breadth of content and the refinement of more established search tools including library databases like Primo, Academic Search Premier and an established academic search engine such as Google Scholar.