The c8gn.24xlarge pairs 96 vCPU with 192 GiB of RAM, the 2.00 GiB-per-vCPU ratio that marks a compute-optimized instance. In the name, "c" stands for compute, "8" is the generation, "gn" marks AWS Graviton (ARM) processors and enhanced networking and "24xlarge" is the size within the c8gn family. It runs on AWS Graviton4 Processor at 2.8 GHz, and AWS introduced it in June 2025. AWS has since shipped c9g; c9g.24xlarge is the direct replacement at this size, scoring 3,406,470 CoreMark/s against this instance's 2,892,220 — roughly 18% more throughput for the same vCPU count. Spot's node ladder tops out below this size, so c8gn.24xlarge becomes 6 × ch.vs1.2xlarge (96 vCPU, 192 GiB combined), $5.69/hr on AWS in US East (N. Virginia), from $0.246/hr on Rackspace Spot. 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 | $5.688 | $1.119 | $0.246 | $5.442 savings | ||
| US Central, Chicago | no AWS region | $0.066 | ||||
| US Central, Dallas | no AWS region | $0.666 | ||||
| Hong Kong | $7.531 | $0.246 | $7.285 savings | |||
| Sydney, Australia | $7.427 | $2.847 | $0.246 | $7.181 savings | ||
| London, UK | $6.741 | $1.285 | $0.786 | $5.955 savings | ||
| US West, San Jose | $7.110 | $0.858 | $0.012 | $7.098 savings | ||
| US Central, Dallas 2 | no AWS region | $0.732 | ||||
| US East, N. Virginia 2 | $5.688 | $1.119 | $0.972 | $4.716 savings |