It appears that benchmark leaks are all the rage these days, especially the AnTuTu variety. We can add another one to the tally, with this supposedly being the Samsung Galaxy Tab 3 10.1. This one's model number is GT-P5200, which is the next iteration right after the Samsung Galaxy Tab 2 10.1, (with the GT-P5100). It scored a 24,616 in AnTuTu, and with this score we expect it will probably have quad-core Qualcomm Snapdragon 600 or an Exynos 5 octa-core, clocked at 1.6GHz. As you can see it is also running Android 4.2.2. We will let you guys know when we find out more info.
Source: TalkAndroid