These AI-inspired images of cities are created using NightCafe and MidJourney, two popular services that use artificial intelligence (AI) to create images from text descriptions.

An AI image generation service creates images using a machine learning technique called Generative Adversarial Networks (GANs). To create images of cities, the AI is trained on images of cities, and then it can generate new images of a future city based on a prompt — a set of words or phrases provided by the image creator. The AI algorithm uses a feedback loop to improve the images it produces, making them increasingly realistic.

https://steins.medium.com/from-cyberpunk-barcelona-to-neo-tokyo-20-ai-generated-cities-you-have-to-see-4a22b47d2b78