SAN FRANCISCO — Artificial-intelligence powerhouse OpenAI announced a major overhaul of ChatGPT that enables the chatbot to search the web and provide answers based on what it finds.The upgrade transforms the experience of using the popular chatbot. It brings OpenAI into more direct competition with Google, offering an alternative way to find and consume information online.Subscribe for unlimited access to The PostYou can cancel anytime.SubscribeBeginning Thursday, paying subscribers to ChatGPT ...