In a letter to investors, Prosper has announced they are releasing their seventh generation credit model (PMI7) around December 20, 2016; Prosper also announced they are changing their credit bureau from Experian to TransUnion; according to Prosper, “Using TransUnion will allow us to leverage trended historical data on borrowers and make better underwriting decisions within the new credit model.”; Prosper’s rating system on loans from AA-HR will remain the same.