Like the iPhone 7 and iPhone 7 Plus, the iPhone X does not include a standard 3.5 mm headphone jack, but it does ship with a Lightning to 3.5 mm Headphone Jack Adapter for use with wired headphones and earbuds.
The iPhone X does not ship with AirPods. Instead it ships with EarPods with Lightning Connector and a Lightning to 3.5 mm Headphone Jack Adapter. AirPods are sold separately for $159 through apple.com and Apple retail locations. You can also purchase a variety of third-party wireless earbuds through amazon.com.