OpenAI is adding a new set of search capabilities to its flagship product, ChatGPT, further escalating the artificial intelligence startup's challenge to Alphabet-owned Google. OpenAI said Thursday that the option, called ChatGPT Search, will let users of the chatbot search for timely information as they would on the web, and get online attribution to news publishers and other data sources. It follows the company's July launch of a prototype called SearchGPT, which is separate from the ChatGPT app and available only to a limited number of users.