CyanogenMod 10.1 nightlies have just started to roll out for a ton of Samsung devices. CyanogenMod 10.1 is based on Android 4.2.1 – Build JOP40D. CyanogenMod is a free, community built, aftermarket firmware distribution of Android 4.2 (JB), which is designed to increase performance and reliability over stock Android for your device. Teamhacksung is the one who brings CyanogenMod for Samsung devices.
A device gets CM nightlies once it's considered stable enough to be a daily driver, so you shouldn't have much stability issues on your device running CyanogenMod 10.1. Do keep in mind that some features of previous CM revisions are yet to be implemented into CM1o.1 but will soon be available in future nightly builds.
CyanogenMod 10.1 Supported Devices:
– Samsung Galaxy S GT-I9000
– Samsung Galaxy S GT-I9000B
– T-Mobile's Samsung Vibrant SGH-T959
– AT&T Samsung Captivate SGH- I897
– Samsung Galaxy S II GT-I9100
– Samsung Galaxy S II GT-I9100G
– AT&T Samsung Galaxy S II GT-I777
– Samsung Galaxy Note GT-N7000
– Samsung Galaxy S III GT-I9300
– AT&T Samsung Galaxy S III SGH-I747
– T-Mobile Samsung Galaxy S III SGH-T999
– US Cellular Samsung Galaxy S III SCH-R530
– Verizon Wireless Samsung Galaxy S III SCHI535
– Sprint Samsung Galaxy S III SPH-L710
– Samsung Galaxy Note II GT-N7100
– Samsung Galaxy Tab 2 7.0 (WiFi) GT-P3110
– Samsung Galaxy Tab 2 7.0 (GSM) GT-P3100
– Samsung Galaxy Tab 2 10.1 (WiFi) GT-p5110
– Samsung Galaxy Tab 2 10.1 (GSM) GT-p5100
(Source: get.cm)
