OpenAI has introduced several significant updates to its ChatGPT service, including a new feature called 'Temporary Chat' that enhances user privacy by not storing chats in history or using them for model training, yet still following custom instructions. Additionally, OpenAI has launched a redesigned website aimed at high-conversion consumer landing pages and developed a ChatGPT application for iOS devices. The company is also reported to be developing a ChatGPT-based search engine as part of its broader strategy to compete with Google, featuring advancements like the ability to use ChatGPT without signing up, long-term memory, and personalization.