How long do you need to cook steak in sous vide to achieve the perfect level of doneness?

The cooking time for steak in sous vide varies depending on the desired level of doneness. Generally, for a medium-rare steak, you would cook it for 1-2 hours, while for a medium steak, you would cook it for 2-3 hours. It's important to use a meat thermometer to ensure the steak reaches the desired internal temperature.