Artificial Intelligence (AI) is the field of computer science that studies and builds systems capable of performing tasks that normally require human intelligence — including recognizing images, understanding natural language, making decisions, solving problems and learning from data.
AI is not a single algorithm but a collection of methods, techniques and mathematical models designed to simulate different aspects of intelligence. Under the most common taxonomy, AI is divided into three levels: Narrow AI — good at one specific task only, Artificial General Intelligence (AGI) — matching human ability across many domains, and Artificial Superintelligence (ASI) — far surpassing human ability in every respect.
As of 2026, every AI system in existence — including ChatGPT, Claude and Gemini — is Narrow AI, however sophisticated and versatile it has become.