c8g.12xlarge is AWS's compute-optimized EC2 size at 48 vCPU and 96 GiB. In the name, "c" stands for compute, "8" is the generation, "g" marks AWS Graviton (ARM) processors and "12xlarge" 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.12xlarge is the direct replacement at this size, scoring 1,639,344 CoreMark/s against this instance's 1,371,723 — roughly 20% more throughput for the same vCPU count. The closest Spot shape is ch.vs1.2xlarge at 16 vCPU, so this instance maps to 3 of them — 48 vCPU and 96 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 | $1.914 | $0.539 | $1.261 | $0.841 | $0.123 | $1.791 savings |
| US Central, Chicago | no AWS region | $0.033 | ||||
| US Central, Dallas | no AWS region | $0.333 | ||||
| Hong Kong | $2.402 | $1.606 | $1.112 | $0.123 | $2.279 savings | |
| Sydney, Australia | $2.491 | $0.686 | $1.645 | $1.132 | $0.123 | $2.368 savings |
| London, UK | $2.267 | $0.308 | $1.496 | $1.030 | $0.393 | $1.874 savings |
| US West, San Jose | $2.379 | $0.371 | $1.571 | $1.082 | $0.006 | $2.373 savings |
| US Central, Dallas 2 | no AWS region | $0.366 | ||||
| US East, N. Virginia 2 | $1.914 | $0.539 | $1.261 | $0.841 | $0.486 | $1.428 savings |