Neural Engine is a series of AI accelerators designed for machine learning by Apple. The first SoC including Neural Engine is Apple A11 Bionic for iPhone 8, 8 Plus and iPhone X introduced in 2017. Since then, all Apple A series SoCs have Neural Engine. In 2020, Apple introduced the Apple M1 for Mac and all Apple M series SoCs have Neural Engine. Apple has stated the Neural Engine in the M4 can perform 38 trillion operations per second (TOPS), an improvement over the 18 TOPS in the M3.