Like many lonely children, Lucas Rizzotto had an imaginary friend: a talking microwave called Magnetron. As the years passed, the pals drifted apart. But Rizzotto never forgot about Magnetron. When OpenAI released the GPT-3 language model, Rizzotto saw a chance to rekindle the friendship. His story provides a cautionary tale about the dangers -- and delights -- of AI.

Until recently, Robyn Ewing was a writer in Hollywood, developing TV scripts and pitching pilots to film studios. Now, she is applying her creative talents toward building the personality of a different type of character - a virtual assistant, animated by artificial intelligence, that interacts with sick patients. Ewing works with engineers on the software program, called Sophie, which can be downloaded to a smartphone. The virtual nurse gently reminds users to check their medication, asks them how they are feeling or if they are in pain, then sends the data to a real doctor. As tech behemoths and a wave of startups double down on virtual assistants that can chat with human beings, writing for AI is becoming a hot job in Silicon Valley.