The Vitamix 4500 has been replaced by the latest update to the model, the Vitamix TurboBlend 2 Speed 1782. After years of use, the reference to "4500" has been dropped by Vitamix. The updated model includes new faceplate aesthetics similar to those on the VS as well as an updated recipe book. The recipe book is over 150 pages and is geared towards healthy lifestyle recipes, similar to the VS book. All other specs and details, other than the naming convention, remain unchanged.