MPT-30B training cluster is a large GPU cluster operated by MosaicML. It came online around June 2023. At that moment it ranked number 75 among known clusters.
It is built on 256 NVIDIA H100 SXM5 80GB. That amounts to about 256 H100e of AI compute. The cluster draws roughly 0.37 MW. Its hardware is estimated at $9M.
Epoch AI rates the certainty of this record as confirmed.