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Ubicloud offers a wide variety of runner types and sizes, allowing you to choose based on your specific needs. By default, using runs-on: ubicloud provisions a 2 vCPU x64 Ubuntu 24.04 runner. You can specify the runner size, for example, runs-on: ubicloud-standard-8 provisions an 8 vCPU runner. You can even specify the operating system, such as runs-on: ubicloud-standard-4-ubuntu-2204, which provisions a 4 vCPU runner with Ubuntu 22.04.

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Available Labels

You can append -ubuntu-2204, -ubuntu-2404, or -ubuntu-2604 to explicitly set the operating system. Ubicloud runners support the following label patterns:

{vcpu}

The supported number of vCPUs are 2 (default), 4, 8, 16, and 30.

{os}

The operation system can be ubuntu-2204, ubuntu-2404 (default), ubuntu-2604.
You can find all the available labels here.

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x64 Runners

Ubicloud x64 standard runners are powered by AMD EPYC 9454P processors, with every two x64 vCPUs corresponding to one physical core. All Ubicloud runners are equipped with modern hardware, including new generation processors, NVMe SSDs, and high-speed networking. This enables us to deliver better price-performance across our services. For our customers who seek even higher performance, we offer premium runners powered by AMD Ryzen 9 7950X3D CPUs. These processors are optimized for single-thread speed and fast CI execution, making them ideal for large monorepos, test-heavy workflows, or any job that benefits from high CPU clock speeds. Learn how to enable premium runners here. Our x64 runner images are fully compatible with default runners. We generate them using the official HashiCorp packer templates published by GitHub in the actions/runner-images repository. We update the images monthly after GitHub releases a new version. We don’t deploy new images on the same day as GitHub to avoid potential issues. In the past, GitHub has encountered problems with new images and had to quickly rollback. To prevent any disruption to our customers, we typically deploy new images a few days after GitHub’s deployment is complete. If you notice any mismatches between Ubicloud x64 runners and the official GitHub runners, please reach out to us at support@ubicloud.com. If your workflow has a package dependency that doesn’t exist on Ubicloud’s image, we recommend installing the dependency manually for the time being or creating an issue at actions/runner-images repository.

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arm64 Runners

Ubicloud arm64 runners are powered by Ampere Altra Q80-30 processors, with each arm64 vCPU backed by a dedicated physical core. This ensures consistent, high-performance computing for your workloads. GitHub began publishing official arm64 images in the actions/runner-images repository in June 2026. Prior to that, Ubicloud built its own arm64 images since GitHub did not publish templates for arm64 at the time. We now use GitHub’s templates to build our arm64 images as well, and update them monthly following each new GitHub release, the same process we use for our x64 images. If you notice any discrepancies between Ubicloud arm64 runners and the official GitHub runners, please reach out to us at support@ubicloud.com.