Microsoft Azure Immunity Bio is a large GPU cluster operated by Microsoft, located in the United States, in the private sector. It came online around April 2020. At that moment it ranked number 25 among known clusters.
It is built on 1,250 NVIDIA V100. That amounts to about 78.95 H100e of AI compute. The cluster draws roughly 0.82 MW. Its hardware is estimated at $24M.
Epoch AI rates the certainty of this record as confirmed.