c8g.16xlarge is AWS's compute-optimized EC2 size at 64 vCPU and 128 GiB. In the name, "c" stands for compute, "8" is the generation, "g" marks AWS Graviton (ARM) processors and "16xlarge" is the size within the c8g family. It runs on AWS Graviton4 Processor at 2.7 GHz, and AWS introduced it in September 2024. AWS has since shipped c9g; c9g.16xlarge is the direct replacement at this size, scoring 2,295,964 CoreMark/s against this instance's 1,995,323 — roughly 15% more throughput for the same vCPU count. The closest Spot shape is ch.vs1.2xlarge at 16 vCPU, so this instance maps to 4 of them — 64 vCPU and 128 GiB across the fleet, about 94% below the US East (N. Virginia) on-demand rate. Spot delivers compute as managed Kubernetes, so a node pool of that size is the native shape of the answer rather than a workaround — provided the workload scales horizontally.
| Region | AWS on-demand | AWS Spot | 1-yr Reserved | 3-yr Reserved | Rackspace Spot | You save |
|---|---|---|---|---|---|---|
| US East, N. Virginia | $2.552 | $0.645 | $1.682 | $1.122 | $0.164 | $2.388 savings |
| US Central, Chicago | no AWS region | $0.044 | ||||
| US Central, Dallas | no AWS region | $0.444 | ||||
| Hong Kong | $3.203 | $2.142 | $1.483 | $0.164 | $3.039 savings | |
| Sydney, Australia | $3.322 | $0.753 | $2.193 | $1.509 | $0.164 | $3.158 savings |
| London, UK | $3.022 | $0.343 | $1.995 | $1.373 | $0.524 | $2.498 savings |
| US West, San Jose | $3.172 | $0.674 | $2.095 | $1.442 | $0.008 | $3.164 savings |
| US Central, Dallas 2 | no AWS region | $0.488 | ||||
| US East, N. Virginia 2 | $2.552 | $0.645 | $1.682 | $1.122 | $0.648 | $1.904 savings |