Apple has introduced new Macbook Air models at Monday morning's WWDC keynote.

The new Airs run on Intel's Ivy Bridge processor--a Core i5 chip in the standard configurations with a Core i7 processor available as a build-to-order option. The updated laptops ship with 4GB of memory, but you can expand that to 8GB.

The updated MacBook Airs now come with USB 3.0 in addition to USB 2. A port on each side incorporates both USB 3 and USB 2 so you don't have to think about which port to plug into; users can plug into either of the two USB ports included in the MacBook Air, according to Apple senior vice president of worldwide product marketing Phil Schiller.

The MacBook Air's FaceTime camera is updated to match the MacBook Pro. FaceTime HD will have a 720p camera.

The 11-inch MacBook Air features a 1.7GHz dual-core i5 processor and an integrated Intel HD Graphics 4000 graphics processor. It comes in a 64GB configuration for $999 and a 128GB configuration for $1099--that's $100 less than Apple charged on the previous 11-inch models. The 13-inch MacBook Airs got a $100 price cut, too: The 128GB model costs $1199 while the 256GB version costs $1499. Those 13-inch laptops feature a 1.8GHz dual-core i5 processor and 4GB of memory.

Build-to-order options for the MacBook Air include a 2.0 GHz Intel Core i7 processor, up to 8GB of 1600 MHz DDR3 onboard memory and up to 512GB flash storage.

The latest MacBook Air ships immediately.

We'll update this article with more details as they become available.