On December 5th, Microsoft Bing launched the Deep Search feature, which provides more relevant and comprehensive answers for complex search queries. It is explained that Deep Search is not a replacement for Bing’s existing web search, but rather an enhanced functionality. Deep Search is based on Bing’s existing web index and ranking system, and it has been enhanced through GPT-4. GPT-4 receives search queries and expands them into more comprehensive descriptions of ideal search results.