OpenAI is gearing up to launch its GPT Store, a platform for sharing and selling custom AI agents made using GPT-4, while also planning a new payment model. Meanwhile, Google is developing an upgraded, paid version of Bard, Bard Advanced, to be powered by Gemini Ultra, its top-tier language model. Finally, news on Perplexity AI, a generative AI search engine startup, successfully raising over $73 million in a Series B funding round, leading to a valuation of $520 million.