University of Bristol Isambard-AI is a large GPU cluster operated by UK Research and Innovation, located in the United Kingdom, in the public sector. It came online around June 2025.
It is built on 5,448 NVIDIA GH200. That amounts to about 5.4K H100e of AI compute. The cluster draws roughly 7.63 MW. Its hardware is estimated at $276M.
Epoch AI rates the certainty of this record as confirmed.