According to the 9to5mac Apple is going to announce Their 13-inch Retina MacBook Pro along with the iPad Mini at a coming event.
This new 13-inch MacBook Pro with a Retina Display is thinner and lighter enclosure when we compare with the already released 15-inch MacBook Pro with Retina display.
The new 13-inch MacBook Pro will be available in multiple(Two) configurations, with different processors and storage.
According to the sources 13-inch MacBook Pro with a Retina Display will be sold at a higher price like Macbook Pro 15-inch with a Retina display model.
Source:9to5mac