At Google I/O 2021, Google today formally announced its fourth-generation tensor processing units (TPUs), which the company claims can complete AI and machine learning training workloads in close-to-record wall clock time. Google says that clusters of TPUv4s can surpass the capabilities of previous-generation TPUs on workloads including object detection, image classification, natural language processing, machine translation, and recommendation benchmarks.

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https://venturebeat.com/2021/05/18/google-details-new-ai-accelerator-chips/