As soon as the Moto X was released earlier in the summer, we heard that a Developer Edition device was on its way. It's finally here. The device comes in two 32GB variants, the GSM version for use on AT&T and/or T-Mobile, and the Verizon version. They are each $650, and do not come with SIM cards. The GSM version is listed as “coming soon,” while the Verizon device is currently available.
Also, the Droid Maxx is now available as a Developer Edition device, also for $650. You can purchase any of the phones from the source links below.
Source: Moto X Verizon | Moto X GSM | Droid Maxx