Amazon Titan training cluster is a large GPU cluster operated by Amazon, located in the United States, in the private sector. It came online around January 2023. At that moment it ranked number 6 among known clusters.
It is built on 13,760 NVIDIA A100. That amounts to about 4.3K H100e of AI compute. The cluster draws roughly 11.42 MW. Its hardware is estimated at $310M.
Epoch AI rates the certainty of this record as likely. Model was released to large clients April 2023, took 48 days to train, so this cluster was operational at least three months beforehand