Some iPhone screens can get down to a single nit of brightness, but these tricks will help it appear even dimmer.

A High Court judge said some major car manufacturers did not install a device to cheat emissions testing.

Ms. Simo, who was Sam Altman’s second in command before taking a medical leave in April, will become a part-time adviser to the company.

For the first time, the company will offer a paid version of the service, a departure from its longtime philosophy of giving its A.I. away for free.

The new release was delayed after the U.S. government restricted the latest artificial intelligence models over cybersecurity concerns.