Kalshi has achieved a significant milestone by becoming the number one app on the App Store, surpassing ChatGPT. This development highlights the rapid growth and popularity of Kalshi, a startup that has gained recognition in the tech landscape. The success of Kalshi reflects the evolving preferences of users and the competitive dynamics in the app market. OpenAI's ChatGPT, which has been a dominant force in artificial intelligence applications, is now in second place following Kalshi's rise to the top. The achievements of both companies underscore the innovation and competition within the technology sector.