EuroHPC Karolina is a large GPU cluster operated by EuroHPC JU, located in Czechia, in the public sector. It came online around June 2021. At that moment it ranked number 37 among known clusters.
It is built on 576 NVIDIA A100. That amounts to about 182 H100e of AI compute. The cluster draws roughly 0.55 MW. Its hardware is estimated at $18M.
Epoch AI rates the certainty of this record as confirmed.