i4g.2xlarge.search is an AWS OpenSearch size with 8 vCPUs, 64 GiB memory. In US East (N. Virginia) it costs $0.988 per hour on demand ($721.24 per month); a 1-year reserved instance with no upfront costs $0.682 per hour, 31% less. It is sold in 8 regions.
Prices by region
USD per hour. Reserved prices are no upfront, standard. Cheapest on-demand first.