Petrobras Atlas is a large GPU cluster operated by Petrobras, located in Brazil, in the public/private sector. It came online around June 2020. At that moment it ranked number 31 among known clusters.
It is built on 1,088 NVIDIA V100. That amounts to about 68.72 H100e of AI compute. The cluster draws roughly 0.98 MW. Its hardware is estimated at $21M.
Epoch AI rates the certainty of this record as confirmed.