<s>[INST] What is the largest city in the world? And how many people are moving there? [/INST] As of April 8, 2023, Tokyo has the largest population in the world.  It had a population of approximately 37 million people in the Greater Tokyo Area and a growth rate of about 0.2% which is low.</s>\ <s>[INST] What is the smallest city in the world? And how many people are moving there? [/INST] 