Create-UI is an open-source tool that generates Vectara-powered sample codebases for user interfaces in seconds, allowing developers to quickly build and test different UI options without investing significant effort into building from scratch. It provides a range of pre-designed GenAI user interfaces, including semantic search, summarized semantic search, and question-and-answer paradigms, each with HTTP request logic for retrieving data and generating responses through Vectara APIs. The tool can be used to create polished user interfaces that run in the browser out-of-the-box, making it easy for developers to experience and test their chosen UI before deciding whether to ship it or modify it further. Create-UI is currently an open-source technology demonstration project intended to showcase how to use Vectara in React, but its creators plan to add more UI options in the future.