The Architecture, Engineering, Construction, and Operation (AECO) industry is beginning to explore the potential of Digital Twins. These applications range from prototyping to simulations, incorporating technologies like Building Information Modeling (BIM), the Internet of Things (IoT), and Artificial Intelligence (AI). The industry is at an early stage of Digital Twins maturity, focusing on integrating dynamic, predictive, or simulated data. However, there’s ambiguity regarding advanced Digital Twins, with terms like cognitive, prescriptive, autonomous and intelligent Digital Twins used inconsistently. This research aims to clarify and standardize terminology and understanding of next-generation Digital Twins, focusing on the last two maturity levels. This research will provide AECO practitioners with a comprehensive understanding of these advanced Digital Twins, guiding their selection based on specific needs and advancing research for more accessible and cost-effective Digital Twins while maintaining functionality. Ultimately, this research aims to unlock the full potential of Digital Twins in the AECO industry.