c7i-flex.16xlarge
Compute optimized · c7i-flex series · Intel Xeon Scalable (Sapphire Rapids)
- vCPU
- 64
- Memory
- 128 GiB
- Linux / hour
- $2.71
- Per month
- $1,981
- Per vCPU-hour
- $0.0424
- Per GiB-hour
- $0.0212
Analysis
The c7i-flex.16xlarge is a compute optimized instance in the c7i-flex series with 64 vCPUs and 128 GiB of memory on Intel Xeon Scalable (Sapphire Rapids) (up to 3.2 GHz), which makes it compute-heavy at 2 GiB of memory per vCPU.
Within the same generation and size, the c7g.16xlarge on AWS Graviton3 costs $2.32/hour, 14% less ($287 a month), though switching means rebuilding software for arm64. The other variants are the c7i.16xlarge at $2.86, the c7gd.16xlarge at $2.90 and the c7a.16xlarge at $3.28.
At $2.71/hour on demand in US East (N. Virginia), about $1,981 a month, the c7i-flex.16xlarge is one of the cheaper ways to buy compute optimized capacity: only 20% of the 291 current compute optimized types cost less per vCPU-hour than its $0.0424.
Running it in Mumbai instead of São Paulo saves $1,072 a month per instance: $2.71/hour against $4.18/hour, a 54% spread.
Reserving it for a year with no upfront payment cuts the Linux rate to $1.79/hour, which beats on demand once it runs more than 66% of the time; three years brings it to $1.19/hour, 56% below on demand. Windows Server roughly doubles the bill at $5.66/hour, because the licence is charged per vCPU.
The newer c8i-flex.16xlarge on Intel Xeon Scalable (Granite Rapids) is 5.0% dearer at $2.85/hour.
Price by region (USD per hour)
| Region | Linux | Windows | 1-yr RI | 3-yr RI | |
|---|---|---|---|---|---|
| N. Virginia us-east-1 | $2.71 | $5.66 | $1.79 | $1.19 | |
| Ohio us-east-2 | $2.71 | $5.66 | $1.79 | $1.19 | |
| Oregon us-west-2 | $2.71 | $5.66 | $1.79 | $1.19 | |
| Canada Central ca-central-1 | $2.97 | $5.91 | $1.97 | $1.30 | |
| São Paulo sa-east-1 | $4.18 | $7.13 | $2.76 | $1.90 | |
| Ireland eu-west-1 | $2.91 | $5.86 | $1.93 | $1.33 | |
| London eu-west-2 | $3.22 | $6.17 | $2.13 | $1.46 | |
| Frankfurt eu-central-1 | $3.10 | $6.04 | $2.04 | $1.40 | |
| Mumbai ap-south-1 | $2.71 | $5.66 | $1.80 | $1.23 | |
| Singapore ap-southeast-1 | $3.13 | $6.07 | $2.08 | $1.42 | |
| Sydney ap-southeast-2 | $3.54 | $6.49 | $2.34 | $1.61 | |
| Tokyo ap-northeast-1 | $3.42 | $6.36 | $2.25 | $1.56 |
Shared tenancy, no pre-installed software. Reserved rates are standard, no upfront, per hour. Prices as of 2026-11-04.
Same shape, other types
| Type | vCPU | Memory | $/hour | vs c7i-flex.16xlarge |
|---|---|---|---|---|
| hpc7g.16xlarge AWS Graviton3 Processor | 64 | 128 GiB | $1.68 | -38% |
| c6g.16xlarge AWS Graviton2 Processor | 64 | 128 GiB | $2.18 | -20% |
| c7g.16xlarge AWS Graviton3 Processor | 64 | 128 GiB | $2.32 | -14% |
| c6a.16xlarge AMD EPYC 7R13 Processor | 64 | 128 GiB | $2.45 | -10% |
| c6gd.16xlarge AWS Graviton2 Processor | 64 | 128 GiB | $2.46 | -9% |
| c5a.16xlarge AMD EPYC 7R32 | 64 | 128 GiB | $2.46 | -9% |
Cost calculator
Specs
| vCPU | 64 |
|---|---|
| Memory | 128 GiB (2.0 per vCPU) |
| Processor | Intel Xeon Scalable (Sapphire Rapids) |
| Clock | 3.2 GHz |
| Storage | EBS only |
| Network | Up to 25000 Megabit |
c7i-flex sizes
| c7i-flex.large | 2 vCPU | $0.0848 |
| c7i-flex.xlarge | 4 vCPU | $0.1696 |
| c7i-flex.2xlarge | 8 vCPU | $0.3392 |
| c7i-flex.4xlarge | 16 vCPU | $0.6783 |
| c7i-flex.8xlarge | 32 vCPU | $1.36 |
| c7i-flex.12xlarge | 48 vCPU | $2.03 |
| c7i-flex.16xlarge | 64 vCPU | $2.71 |