Inventory Lenovo Model Names
Lenovo stores its friendly model names in a different location in WMI that any other manufacturer. By default SCCM does not inventory this WMI class. In order to populate the Lenovo model names you must extend hardware inventory to include the ComputerSystemProduct WMI class. Adding this class will ensure that the reports in BI for SCCM contain model names such as, "X1 Carbon" rather than something like "20K3".
For more information on extending Configuration Manager hardware inventory see the section Add a new inventory class on the How to extend hardware inventory in Configuration Manager documentation page.