Brave Leo is an AI assistant built natively in the Brave browser. It is available in the Nightly desktop channel and allows users to interact with web pages without leaving the page itself. Leo can provide video transcripts, interactive article summaries, and help with reading comprehension. It can answer questions and suggest follow-up queries. Leo is designed to prioritize user privacy, with user inputs submitted anonymously. It is a chat assistant that provides AI-powered assistance directly within the web browsing experience.