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Pick a size with --type when you create a sandbox. Without --type, you get default (the medium size).
  • large needs your first payment. The free trial cannot use it.
  • * xlarge needs the $100 plan or higher. You do not need to contact us. Normal compute rates and account limits apply.
  • These four sizes are the only sizes. boat has no custom size and no size above xlarge.
  • “Disk” is the maximum size of your own files. The operating system and the pre-installed tools are not in it. Run df -h / in a sandbox to see the live figure.
  • All sizes are x86_64. No size has a GPU.
  • For sandboxes at once and start limits per plan, see Limits and errors.
  • The dashboard Sandboxes page shows the size of each sandbox in the Type column. Filter by size with Type. The API returns it as type.
Stop, resume and fork keep the size. A fork gets the size of its source sandbox. To change the size, stop the sandbox, then resume it with --type. Read Change size.

What every sandbox has

Each sandbox is a full Linux virtual machine with its own kernel.

Learn more

Base image and pre-installed tools

Languages, coding agents, Docker and utilities, with their versions.

Change size

Stop the sandbox, then resume it with a bigger or smaller size.

Virtualization

Run KVM, Firecracker or the Android emulator in a sandbox.

Fail fast when no machine is free

Get an answer in about 1.5 seconds when no machine of your size is ready.