AI development stages show the complexity of AI solutions and their main functions. They range from the simplest ones to the most comprehensive and complex. According to some categorizations it includes:
Reactive AI that provides an answer based on your input (like Netflix)
Limited Memory AI uses and builds the knowledge to perform classification tasks (like the ones we use now)
Theory of Mind AI that almost behaves and answers like human
Self-aware AI — the most advanced stage of awareness.