ReadON, a decentralized content distribution platform, launched Sphinx, a Proof of Read tool based on ChatGPT. It can intelligently analyze the content of articles and generate corresponding Quiz. Users can answer questions as proof of reading content. At the same time, Sphinx can produce Quiz with different constraints on content including news, information, research, and courses to help users review and understand the content, and Sphinx can improve the accuracy of the proof at a low cost, and realize the transition from reading proof to knowledge proof evolve.