r8i-flex.4xlargevsr8i.4xlarge

r8i-flex.4xlarge is 5% cheaper than r8i.4xlarge on demand in US East (N. Virginia), saving $40.59 a month.

At a glancer8i-flex.4xlarger8i.4xlarge
On-demand$1.056/hr5% less$1.111/hr
Lowest rate$0.2847/hr11% lessSpot, can be interrupted$0.32/hrSpot, can be interrupted
Size16 vCPUs, 128 GiB16 vCPUs, 128 GiB
ProcessorIntel Xeon Scalable (Granite Rapids)Intel Xeon Scalable (Granite Rapids)
Architecturex86_64x86_64

Prices in US East (N. Virginia)

“Off” is the discount against each type’s own on-demand price. Linux, USD per hour.

Optionr8i-flex.4xlarger8i.4xlarger8i.4xlarge vs r8i-flex.4xlarge
On-demandPay by the hour$1.056$1.111▲ 5%
SpotCan be interrupted73% off$0.284771% off$0.32▲ 12%
1-yr savings planHourly commitment28% off$0.764928% off$0.8052▲ 5%
3-yr savings planHourly commitment48% off$0.550748% off$0.5797▲ 5%

Key differences

The biggest lead each one has.

Where r8i-flex.4xlarge leads
On-demand price$1.056 vs $1.111 per hour
5% cheaper
Where r8i.4xlarge leads
Network baseline7.5 Gbps vs 3.75 Gbps
2× higher
EBS baseline bandwidth5,000 Mbps vs 2,500 Mbps
2× higher

Specs

7 of 40 specs differ. Those are in bold.

ComputeAll 10 matchr8i-flex.4xlarger8i.4xlarge
vCPUs1616
Physical cores88
Threads per core22
Architecturex86_64x86_64
ProcessorIntel Xeon Scalable (Granite Rapids)Intel Xeon Scalable (Granite Rapids)
CPU makerIntelIntel
Clock speed3.9 GHz3.9 GHz
Sustained clock3.9 GHz3.9 GHz
Processor featuresIntel AVX; Intel AVX2; Intel AVX512; Intel Turbo; Intel AMXIntel AVX; Intel AVX2; Intel AVX512; Intel Turbo; Intel AMX
BurstableNoNo
MemoryAll 1 matchr8i-flex.4xlarger8i.4xlarge
Memory (GiB)128128
Networking1 of 8 differr8i-flex.4xlarger8i.4xlarge
NetworkUp to 15000 MegabitUp to 15000 Megabit
Network baseline3.75 Gbps7.5 Gbps
Network peak15 Gbps15 Gbps
Enhanced networkingYes (ENA)Yes (ENA)
EFANoNo
IPv6YesYes
Max network interfaces88
IPv4 addresses per interface5050
Storage3 of 11 differr8i-flex.4xlarger8i.4xlarge
StorageEBS onlyEBS only
EBS optimizedYesYes
EBS over NVMeRequiredRequired
EBS throughputUp to 10000 MbpsUp to 10000 Mbps
EBS baseline bandwidth2,500 Mbps5,000 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput312.5 MB/s625 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS12,00020,000
EBS max IOPS40,00040,000
Max EBS volumes3232
Instance details3 of 10 differr8i-flex.4xlarger8i.4xlarge
Familyr8i-flexr8i
CategoryMemory optimizedMemory optimized
Current generationYesYes
Normalization factor3232
Bare metalNoNo
HypervisorNitroNitro
Placement groupsPartition, SpreadCluster, Partition, Spread
HibernationYesYes
Nitro EnclavesNoYes
Boot modesLegacy BIOS, UEFILegacy BIOS, UEFI

On-demand prices by region

Cheapest for r8i-flex.4xlarge first. Linux, USD per hour.

Regionr8i-flex.4xlarger8i.4xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$1.056$1.111▲ 5%
US East (Ohio)us-east-2$1.056$1.111▲ 5%
US West (Oregon)us-west-2$1.056$1.111▲ 5%
Asia Pacific (Malaysia)ap-southeast-5$1.083$1.139▲ 5%
Asia Pacific (Hyderabad)ap-south-2$1.089$1.147▲ 5%
Asia Pacific (Mumbai)ap-south-1$1.089$1.147▲ 5%
EU (Stockholm)eu-north-1$1.123$1.182▲ 5%
Canada (Central)ca-central-1$1.156$1.217▲ 5%
Canada West (Calgary)ca-west-1$1.156$1.217▲ 5%
US West (N. California)us-west-1$1.173$1.235▲ 5%
EU (Ireland)eu-west-1$1.181$1.244▲ 5%
Europe (Spain)eu-south-2$1.181$1.244▲ 5%
EU (London)eu-west-2$1.24$1.305▲ 5%
EU (Milan)eu-south-1$1.24$1.305▲ 5%
EU (Paris)eu-west-3$1.24$1.305▲ 5%
Asia Pacific (Sydney)ap-southeast-2$1.265$1.332▲ 5%
AWS GovCloud (US-East)us-gov-east-1$1.265$1.332▲ 5%
AWS GovCloud (US-West)us-gov-west-1$1.265$1.332▲ 5%
Asia Pacific (Seoul)ap-northeast-2$1.274$1.341▲ 5%
Asia Pacific (Singapore)ap-southeast-1$1.274$1.341▲ 5%
Asia Pacific (Tokyo)ap-northeast-1$1.274$1.341▲ 5%
EU (Frankfurt)eu-central-1$1.274$1.341▲ 5%
Middle East (UAE)me-central-1$1.30$1.368▲ 5%
Asia Pacific (New Zealand)ap-southeast-6$1.329$1.398▲ 5%
Europe (Zurich)eu-central-2$1.401$1.475▲ 5%
Africa (Cape Town)af-south-1$1.408$1.482▲ 5%
South America (Sao Paulo)sa-east-1$1.684$1.773▲ 5%

Keep exploring

Each type’s own page, and how it compares with others.

r8i-flex.4xlargeMemory optimized, r8i-flex family
r8i-flex.4xlarge prices and specsEvery size in the r8i-flex family

Compare r8i-flex.4xlarge with

c8i-flex.4xlargem8i-flex.4xlarge
r8i.4xlargeMemory optimized, r8i family
r8i.4xlarge prices and specsEvery size in the r8i family

Compare r8i.4xlarge with

c8i.4xlargem8i.4xlarger8g.4xlarger8a.4xlarger8ib.4xlarger8id.4xlarger8idb.4xlarger8idn.4xlarger8in.4xlarger7i.4xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 48% below on-demand. Connect your cloud accounts to unlock greater savings with commitment protection.

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AWS EC2 Linux prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.