Microsoft Defends New Bing, Says AI Chatbot Upgrade Is Work in Progress

Just over a week after Microsoft Corp. MSFT -2.66%decrease; red down pointing triangle unveiled its new Bing search engine powered by the technology behind the buzzy ChatGPT artificial-intelligence chatbot, early testers are calling out mistakes and disturbing responses generated by the technology.

Microsoft said that the search engine is still a work in progress, describing the past week as a learning experience that is helping it test and improve the new Bing. So far, only a select set of people have been given access to it. The company said in a blog post late Wednesday that the Bing...