Google previews MUM, its new tech that’s 1,000x more powerful than BERT Multitasking is the key differentiator, enabling MUM to acquire knowledge, understand and generate language and interpret text, images and video all at the same time. George Nguyen on May 18, 2021 at 3:48 pm Google’s Prabhakar Raghavan showcased a new technology called Multitask Unified Model (MUM) at Google I/O on Tuesday. Similar to BERT, it’s built on a transformer architecture but is far more powerful (1,000 times more powerful) and is capable of multitasking to connect information for users in new ways. The company is currently running internal pilot programs with MUM, although no public rollout date was announced.