Pick up to four instance types from one cloud and compare their specs, pricing, and cost efficiency in a single region. Looking for instances by vCPU or memory range instead? Browse by spec.
| memory-optimizedr5b.4xlarge | memory-optimizedr5b.12xlarge | |
|---|---|---|
| Compute | ||
| vCPUs | 16 | 48 |
| Memory | 128 GB | 384 GB |
| Memory per vCPU | 8.00 GB | 8.00 GB |
| Architecture | x86_64 | x86_64 |
| Processor | Intel | Intel |
| Family | r5b | r5b |
| Category | memory-optimized | memory-optimized |
| Price in us-east-1 | ||
| On-demand | $1.192$870.16/mo | $3.576$2610.48/mo |
| Spot | $0.565$412.23/mo | $1.930$1408.75/mo |
| Reserved 1-year | $0.82231% off on-demand | $2.46731% off on-demand |
| Reserved 3-year | $0.51557% off on-demand | $1.54457% off on-demand |
| Spot savings | 53% | 46% |
| Cost efficiency in us-east-1 | ||
| $ / vCPU / hr | $0.0745 | $0.0745 |
| $ / GB RAM / hr | $0.0093 | $0.0093 |
| Availability | ||
| Regions | 14 | 14 |
| Cheapest region | us-east-1 · $1.192 | us-east-1 · $3.576 |
| Cheapest spot region | eu-south-1 · $0.239 | ca-central-1 · $0.391 |
| Price snapshot | 2026-08-14 | 2026-08-14 |