Harbor

Thunder maintains a fork of Harbor with a thunder environment. Set up your API token with the Sandbox quickstart, then install the fork:

uv tool install "harbor[thunder] @ git+https://github.com/Thunder-Compute/harbor.git"

Pass --env thunder to any run:

harbor run -d terminal-bench@2.0 -a claude-code -m <model> --env thunder --n-concurrent 32

Dockerfile and image tasks run natively in a sandbox, and Compose tasks run Docker inside a sandbox VM. Task network policies and GPU requests (gpus, gpu_types of H100 or A100) are supported.

Environment kwargs

Pass with --ek key=value:

Option	Description
`gpu_type`	Override the task’s GPU type.
`vm_cpus`, `vm_memory_mb`, `vm_storage_mb`	Size the VM independently of task limits (even vCPUs ≥ 4, ≥ 16 GiB memory, ≥ 18 GiB storage).
`sandbox_timeout_sec`	Maximum sandbox lifetime. No limit by default.
`sandbox_id`, `existing_sandbox_name`	Reuse an existing sandbox. Harbor won’t terminate it.
`registry_username`, `registry_password`, `registry_server`	Private registry credentials.

Sandboxes kept with --no-delete are billed until terminated, so pair it with sandbox_timeout_sec. See pricing.

Getting Started

Operations

Guides

Sandboxes

Reference

API Reference

Environment kwargs

​Environment kwargs

Environment kwargs