AIST ABCI 2.0 is a large GPU cluster operated by National Institute of Advanced Industrial Science and Technology (AIST), located in Japan, in the public sector. It came online around May 2021. At that moment it ranked number 21 among known clusters.
It is built on 960 NVIDIA A100 SXM4 40 GB, alongside NVIDIA Tesla V100 SXM2. That amounts to about 303 H100e of AI compute. The cluster draws roughly 2.82 MW. Its hardware is estimated at $116M.
Epoch AI rates the certainty of this record as confirmed. Builds off of ABCI 1.0, which was first operational in August 2018