MosaicML MPT training cluster is a large GPU cluster operated by MosaicML. It came online around March 2023. At that moment it ranked number 106 among known clusters.
It is built on 440 NVIDIA A100. That amounts to about 139 H100e of AI compute. The cluster draws roughly 0.37 MW. Its hardware is estimated at $10M.
Epoch AI rates the certainty of this record as confirmed.