m6idn.12xlarge is AWS's general-purpose EC2 size at 48 vCPU and 192 GiB. In the name, "m" is the general-purpose line, "6" is the generation, "idn" marks Intel processors, local NVMe storage and enhanced networking and "12xlarge" is the size within the m6idn family. It runs on Intel Xeon 8375C (Ice Lake) at 3.5 GHz, and AWS introduced it in November 2022. AWS has since shipped m7i, m8idn and m9g; m7i.12xlarge is the direct replacement at this size, scoring 1,068,012 CoreMark/s against this instance's 819,812 — roughly 30% more throughput for the same vCPU count. The closest Spot shape is gp.vs2.2xlarge at 16 vCPU, so this instance maps to 3 of them — 48 vCPU and 192 GiB across the fleet, $3.82/hr on AWS in US East (N. Virginia), from $0.123/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 | $3.819 | $0.535 | $2.406 | $1.485 | $0.123 | $3.696 savings |
| US Central, Chicago | no AWS region | $0.123 | ||||
| US Central, Dallas | no AWS region | $0.153 | ||||
| Hong Kong | $0.033 | |||||
| Sydney, Australia | $4.830 | $1.407 | $3.043 | $2.087 | $0.483 | $4.347 savings |
| London, UK | $4.343 | $0.779 | $2.736 | $1.674 | $0.663 | $3.680 savings |
| US West, San Jose | $4.403 | $0.772 | $2.774 | $1.697 | $0.453 | $3.950 savings |
| US Central, Dallas 2 | no AWS region | $0.003 | ||||
| US East, N. Virginia 2 | $3.819 | $0.535 | $2.406 | $1.485 | $0.453 | $3.366 savings |