In tweaking its chatbot to appeal to more people, OpenAI made it riskier for some of them. Now the company has made its chatbot safer. Will that undermine its quest for growth?

© Julia Dufosse

Clinicians often rely on patients to disclose thoughts of self-harm, but some are lobbying for a new diagnosis to better assess the risk.

Seven complaints, filed on Thursday, claim the popular chatbot encouraged dangerous discussions and led to mental breakdowns.

© Chloe Ellingson for The New York Times

A mother in Florida filed a lawsuit against an A.I. start-up, alleging its product led to her son’s death. The company’s defense raises a thorny legal question.

© Naila Ruechel for The New York Times