c7i-flex.12xlarge
Compute optimized · c7i-flex series · Intel Xeon Scalable (Sapphire Rapids)
- vCPU
- 48
- Memory
- 96 GiB
- Linux / hour
- $2.03
- Per month
- $1,485
- Per vCPU-hour
- $0.0424
- Per GiB-hour
- $0.0212
Analysis
The c7i-flex.12xlarge is a compute optimized instance in the c7i-flex series with 48 vCPUs and 96 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.12xlarge on AWS Graviton3 costs $1.74/hour, 14% less ($215 a month), though switching means rebuilding software for arm64. The other variants are the c7i.12xlarge at $2.14, the c7gd.12xlarge at $2.18 and the c7a.12xlarge at $2.46.
At $2.03/hour on demand in US East (N. Virginia), about $1,485 a month, the c7i-flex.12xlarge 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 $804 a month per instance: $2.03/hour against $3.14/hour, a 54% spread.
Reserving it for a year with no upfront payment cuts the Linux rate to $1.35/hour, which beats on demand once it runs more than 66% of the time; three years brings it to $0.8958/hour, 56% below on demand. Windows Server roughly doubles the bill at $4.24/hour, because the licence is charged per vCPU.
The newer c8i-flex.12xlarge on Intel Xeon Scalable (Granite Rapids) is 5.0% dearer at $2.14/hour.
Price by region (USD per hour)
| Region | Linux | Windows | 1-yr RI | 3-yr RI | |
|---|---|---|---|---|---|
| N. Virginia us-east-1 | $2.03 | $4.24 | $1.35 | $0.8958 | |
| Ohio us-east-2 | $2.03 | $4.24 | $1.35 | $0.8958 | |
| Oregon us-west-2 | $2.03 | $4.24 | $1.35 | $0.8958 | |
| Canada Central ca-central-1 | $2.23 | $4.43 | $1.48 | $0.9773 | |
| São Paulo sa-east-1 | $3.14 | $5.34 | $2.07 | $1.42 | |
| Ireland eu-west-1 | $2.18 | $4.39 | $1.45 | $0.9956 | |
| London eu-west-2 | $2.42 | $4.63 | $1.60 | $1.10 | |
| Frankfurt eu-central-1 | $2.32 | $4.53 | $1.53 | $1.05 | |
| Mumbai ap-south-1 | $2.03 | $4.24 | $1.35 | $0.9228 | |
| Singapore ap-southeast-1 | $2.35 | $4.55 | $1.56 | $1.06 | |
| Sydney ap-southeast-2 | $2.66 | $4.87 | $1.75 | $1.21 | |
| Tokyo ap-northeast-1 | $2.56 | $4.77 | $1.69 | $1.17 |
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.12xlarge |
|---|---|---|---|---|
| c6g.12xlarge AWS Graviton2 Processor | 48 | 96 GiB | $1.63 | -20% |
| c7g.12xlarge AWS Graviton3 Processor | 48 | 96 GiB | $1.74 | -14% |
| c6a.12xlarge AMD EPYC 7R13 Processor | 48 | 96 GiB | $1.84 | -10% |
| c6gd.12xlarge AWS Graviton2 Processor | 48 | 96 GiB | $1.84 | -9% |
| c5a.12xlarge AMD EPYC 7R32 | 48 | 96 GiB | $1.85 | -9% |
| c8g.12xlarge AWS Graviton4 Processor | 48 | 96 GiB | $1.91 | -6% |
Cost calculator
Specs
| vCPU | 48 |
|---|---|
| Memory | 96 GiB (2.0 per vCPU) |
| Processor | Intel Xeon Scalable (Sapphire Rapids) |
| Clock | 3.2 GHz |
| Storage | EBS only |
| Network | Up to 18750 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 |