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Earlier this week, Anthropic rolled out a web search<\/a> feature for its AI-powered chatbot platform, Claude, bringing the bot in line with many of its rivals. It wasn\u2019t immediately clear which search index might be powering the feature \u2014 one possibility was that Anthropic had developed its own. But evidence suggests it\u2019s Brave Search, the search engine maintained by browser developer Brave. <\/p>\n As spotted<\/a> by software engineer Antonio Zugaldia on Friday, Anthropic added \u201cBrave Search\u201d to the \u201csubprocessor list\u201d in its documentation this week \u2014 the list of Anthropic partners who process Claude data. British programmer Simon Willison reports<\/a> that at least one search in Claude and Brave returned identical citations. Willison also found<\/a> that Claude\u2019s web search function contains a parameter called \u201cBraveSearchParams.\u201d<\/p>\n We\u2019ve reached out to Anthropic and will update this post if we hear back.<\/p>\n Brave underpins at least one other chatbot\u2019s search functionality: Mistral\u2019s chatbot platform Le Chat. In February, Brave and Mistral announced that Le Chat would use Brave\u2019s search API<\/a> for live web results.<\/p>\n Some AI companies keep info about their search index partnerships close to the chest, possibly for competitive reasons. OpenAI has a partnership with Bing but uses other undisclosed sources to power the search experience in ChatGPT<\/a> as well.<\/p>\n<\/div>\n