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VercelElisabeth Rülke1 min readrelease notesintro

Run Terminal-Bench and other Harbor evals on Vercel Sandbox

Summary

Vercel now supports running Harbor benchmarks, like Terminal‑Bench, inside its Sandbox using Firecracker microVMs. The integration with AI Gateway lets you benchmark multiple models by swapping the `--model` flag, scaling concurrency with `--n-concurrent`.

  • Harbor benchmarks can be executed on Vercel Sandbox via `--env vercel`, each trial runs in an isolated Firecracker microVM.
  • Network policies are enforced at the sandbox firewall; credential injection adds secrets only to outbound requests, never inside the VM.
  • Vercel AI Gateway lets a single `AI_GATEWAY_API_KEY` access many models; switch models with the `--model` flag.
  • Install with `uv tool install 'harbor[vercel]'` and set `VERCEL_TOKEN` and `AI_GATEWAY_API_KEY` before running.

AI engineers and researchers can run large‑scale model benchmarks without provisioning their own infrastructure.

4/10

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