US cheapest spot
N. Virginia
us-east-1
spot · 7-day average $0.0216/hr
on-demand$0.0798
spot interrupt freq >20%
c8g.large
AWS Graviton4 processor. Compute-optimized, delivers up to 30% better performance than Graviton3-based C7g instances, built on the AWS Nitro System, and offers enhanced networking bandwidth up to 50 Gbps and up to 40 Gbps to Amazon EBS. It is ideal for compute-intensive workloads such as HPC, batch processing, and CPU-based machine learning inference.
available for self-hosted runners on RunsOn
single-thread · passmark
1,945pts
vcpus
2
2 cores
memory
4 GiB
ram
clock speed
2.8 GHz
max frequency
architecture
arm64
Graviton
Measured
5 jobs of 5 finished in the hardware suite, 14–26 Oct: the values are their medians. Every job links its log on the open harness.
CPU Mark
1,977
PassMark, both vCPUs
cores of work
1.99
sysbench, 2 threads ÷ 1
sysbench 1 thread
3,174
events per second
7-zip
15,816
MIPS, all threads
| date | suite | single-thread | capacity | job log |
|---|---|---|---|---|
| 26 Oct 2026 | hardware suite | 1,947 | spot | job log ↗ |
| 23 Oct 2026 | hardware suite | 1,945 | spot | job log ↗ |
| 20 Oct 2026 | hardware suite | 1,939 | spot | job log ↗ |
| 17 Oct 2026 | hardware suite | 1,944 | spot | job log ↗ |
| 14 Oct 2026 | hardware suite | 1,945 | spot | job log ↗ |
- Cross-check, daily PassMark: 1,945 single-thread over 10 runs (PassMark only, every day on RunsOn's 2 vCPU runners).
- Cross-check, EC2 CPU sweep: 1,940 single-thread over 2 runs.
- Also a runner in RunsOn's runner benchmarks: see it as a CI runner →
EC2 instance family: c8g
What the family is built for, the silicon underneath, and how to ask RunsOn for it.
c8g compute
cpu type
Neoverse-V2 — AWS Graviton4 processor
architecture
arm64
highlights
Compute-optimized, delivers up to 30% better performance than Graviton3-based C7g instances, built on the AWS Nitro System, and offers enhanced networking bandwidth up to 50 Gbps and up to 40 Gbps to Amazon EBS. It is ideal for compute-intensive workloads such as HPC, batch processing, and CPU-based machine learning inference
released
General availability announced on October 20, 2024
.github/workflows/ci.yml yaml
jobs: build: runs-on: - runs-on=${{ github.run_id }} - family=c8g - cpu=2
the label is a query — each line one constraint, resolved at launch. job labels →
Availability & price by region
Spot is the 7-day average of the cheapest zone's spot price in each region, from the RunsOn finder: an estimate of an hour in your own AWS account, where RunsOn adds no markup. The bar shows how far it runs under on-demand; the badge is AWS's spot-interruption band for the type.
US
Oregon
us-west-2
spot · 7-day average $0.0236/hr
on-demand$0.0798
spot interrupt freq <5%
IE
Ireland
eu-west-1
spot · 7-day average $0.0380/hr
on-demand$0.0853
spot interrupt freq <5%
DE
Frankfurt
eu-central-1
spot · 7-day average $0.0415/hr
on-demand$0.0907
spot interrupt freq <5%
Spot is the cheapest availability zone's spot price at each of the RunsOn finder's fetches (every 90 minutes), averaged over 7 days; on-demand is the Linux list price. Savings compare the two. Prices fetched 26 Oct 2026. The interruption band is AWS Spot Advisor's, fetched 26 Oct 2026.
Other sizes measured
Larger c8g sizes the harness measured in RunsOn's runner benchmarks, each from the suite with the most runs.
| type | vCPU | memory | single-thread | CPU Mark | runs | spot $/hr · us-east-1 |
|---|---|---|---|---|---|---|
| c8g.xlarge | 4 | 8 GiB | 1,947 | 3,936 | 5 runs · hardware suite | $0.0615 |
| c8g.2xlarge | 8 | 16 GiB | 1,947 | 7,657 | 5 runs · hardware suite | $0.1235 |
About these benchmarks
The open benchmark harness launches c8g.large as a RunsOn runner and runs PassMark PerformanceTest (CPU Single
Threaded and CPU Mark), sysbench on one thread and on every thread, and 7-Zip's built-in benchmark. These numbers come from the
hardware suite, the suite that measured this type in the most runs; each is the median over its runs of the current
workload definition in the last 30 days.
A type takes a place once it has 3 runs. A type within 5% of the type heading its group shares that place (“joint #2”); a lead under 5% is no lead.
Prices come from the RunsOn finder for the four regions shown; savings compare its 7-day average spot price with the on-demand price. RunsOn launches this type the same way for any job: ephemeral EC2 in your account, one CloudFormation stack. More in the methodology.
Run c8g.large in your own account.
The benchmark runs on the same RunsOn anyone can deploy. One CloudFormation stack, your AWS account, ~10 minutes.