The central premise of our work is that the best way to define a concept is to lay down a procedure to measure it. Therefore, we ignored the debate on whether computers really have intelligence and brought AI chatbots to take an IQ test. The IQ score quantitatively determines whether AI chatbots are intelligent. The chatbot, Perplexity, achieves an IQ score of 136 which corresponds to a very advanced intelligence and is higher than 99.18% of the population. Currently, programming bugs are the main road block that prevents AI chatbots to fully exploit their intelligence. If the major bugs are fixed, AI chatbots will achieve even higher IQ score.