The r8i-flex.4xlarge is a memory optimised instance in the r8i-flex family with 16 vCPU and 128 GiB of memory on Intel Xeon Scalable (Granite Rapids). It costs $905.26 a month on-demand in eu-south-1 (Milan) and is offered in 25 regions.
The list price has not changed in this window. Spot moves with demand and is read every few minutes.
Aug 2026
First listed in the AWS price list archive
The list price has never changed in eu-south-1 since then.
Archive dates are the month of the AWS price list version that first carried the price.
Last moved 1 h ago, 25 Oct 2026 +0.1%
Steady: the cheapest zone stayed within 2% over 3 days.
Tracked since 22 Oct 2026, read every few minutes.
| Pod requests | Pods | Per pod, a month |
|---|---|---|
| 100m CPU, 128 MiB | 110pod cap | $8.23 |
| 250m CPU, 512 MiB | 63cpu | $14.37 |
| 500m CPU, 1 GiB | 31cpu | $29.20 |
| 1 CPU, 4 GiB | 15cpu | $60.35 |
Node share from GKE's published kube-reserved formula plus a 100 MiB eviction threshold; EKS and AKS keep similar amounts. DaemonSets take more on top. At most 110 pods per node, the kubelet default.
First year, 3 instances
Spot saves $25,651 a year
Reserved capacity is billed every hour of the month whether it runs or not.
169.2g CO₂ an hour in eu-south-1
123.5 kg a month. Grid 233 g per kWh.
Lowest-carbon regions for this type. The dirtiest emits 116× the cleanest.
| $770.70 | $226.45 | 71% | 234 | |
| $770.70 | $140.01 | 82% | 345 | |
| $770.70 | $222.58 | 71% | 149 | |
| $790.27 | $229.73 | 71% | 87 | |
| $795.17 | $156.29 | 80% | 514 | |
| $795.17 | $79.50 | 90% | 514 | |
| $819.64 | $85.34 | 90% | 6 | |
| $844.11 | $196.59 | 77% | 135 |
curl "https://prices.cloudadapt.io/api/v1/compute/aws/r8i-flex.4xlarge?region=eu-south-1"
List prices from AWS in US dollars, before discounts, credits and taxes. A month is 730 hours, a year 8,760. AWS pricing page