Vast.ai is the cheapest way to rent a GPU — a 4090 from ~$0.14/hr, an H100 from ~$1.79/hr (24 Sep 2026). But reliability depends on the host, not…
Aliteq
Ravi Malhotra · Hardware Editor
The short answer
Vast.ai is a GPU marketplace where independent hosts rent out their cards, giving it the lowest spot prices of any major cloud (RTX 4090 ~$0.14/hr, H100 from ~$1.79/hr as of 24 Sep 2026).…
Marketplace of independent hosts — the lowest spot prices, per-second billing, Docker containers.
Spot (interruptible) is much cheaper than on-demand but reclaimable with minutes' notice.
Reliability is host-specific — check each host's reliability score, DLPerf and reviews.
Cheapest sticker price ≠ cheapest real cost on unverified hosts (restart overhead).
Best for cheap interruptible work; skip for critical training or regulated data.