Some talk about super intelligence, AI personal assistants for all, and a world free of want. Others warn of the robot apocalypse. A few even argue that the potential of current AI models is overblown.

The OpenAI CEO recently published a blog post reflecting on AI progress, as well as his brief ouster from the company.

AlexNet, created by Alex Krizhevsky, Sutskever and Geoffrey Hinton, used a deep convolutional neural network (CNN)—a powerful new type of computer program—to recognize images far more accurately than ever, kick-starting major progress in AI.