Restaurants that specialize in steak often use a combination of cooking techniques to ensure that the meat is cooked to perfection and meets customer preferences. While grilling is a popular method for cooking steak, especially for achieving a charred exterior and smoky flavor, many high-end steakhouses also utilize sous vide cooking as part of their process. Here's an overview of how these techniques are used:

1. **Grilling**: Grilling is a classic method for cooking steak that imparts a delicious charred exterior and smoky flavor. Restaurants that specialize in steak often invest in high-quality grills, such as gas or charcoal grills, equipped with temperature controls to ensure precise cooking. Chefs typically sear the steak over high heat to develop a flavorful crust, then adjust the heat to finish cooking the steak to the desired level of doneness.

2. **Sous Vide**: Sous vide cooking involves vacuum-sealing the steak in a plastic bag and cooking it in a water bath at a precisely controlled temperature for an extended period. This technique allows for precise control over the cooking temperature, resulting in evenly cooked steak with a consistent level of doneness throughout. After sous vide cooking, the steak is often finished on a grill or in a hot skillet to sear the exterior and enhance flavor and texture.

3. **Reverse Searing**: Some steakhouses use a reverse searing method, which involves cooking the steak at a low temperature (either in a sous vide water bath or in a low-temperature oven) until it reaches the desired internal temperature. The steak is then finished with a high-heat sear on a grill or in a skillet to develop a caramelized crust.

4. **Broiling**: In addition to grilling, some steakhouses use broiling as a cooking method for steak. Broiling involves cooking the steak under high heat from above, resulting in a caramelized exterior and juicy interior. This method is often used for thicker cuts of steak that benefit from quick, high-heat cooking.

Overall, restaurants that specialize in steak often use a combination of grilling, sous vide cooking, reverse searing, and broiling techniques to ensure that the meat is cooked to perfection and meets the high standards of their customers. The specific cooking method may vary depending on factors such as the cut of steak, customer preferences, and the restaurant's culinary style.