Does AI really exist, or is it just better and quicker programming of what we have?

At first, we should coear the definition of AI which is "a computer performs tasks that require human intelligence ". Nowadays computers are performing the tasks which were specific to humans like interpreting the natural language , pattern recognition, problem solving and adapting to new conditions. Computers are trained on models like natural language processing. Thus AI exists. Therefore machine are performing tasks to aid human. Models are being developed to create more accurate systems.