/blog / comparison
Vast.ai for hobbyist ML: when the marketplace beats Runpod
A field guide to renting GPUs from random people on the internet — and why it's sometimes the right call.
- gpu
- comparison
- vast
- runpod
- hobbyist
Vast.ai is a marketplace where random hosts list their spare GPU capacity. The economics are brutal: an RTX 4090 you’d pay $0.34/hr for on Runpod can be $0.18/hr on Vast — if you’re willing to read host reliability scores carefully.
Where Vast wins
Hobbyist work where downtime is annoying but not expensive. One-off fine-tunes. Overnight inference jobs. Anything where “works ~95% of the time” is acceptable.
Where Runpod wins
Anything user-facing. Production inference. Anything where a host yanking the box mid-job costs you more than the savings.
The right answer for most readers is “use Vast for experiments, Runpod for things you’ll show someone.” We use both.
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NVLink H100s in the Cloud: Runpod vs Lambda vs CoreWeave
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