Vast.ai A100 Pricing Options
All available A100 instance types on Vast.ai, sorted by lowest hourly rate.
| Region | Instance | Type | Price/hr | GPUs | vCPUs | RAM |
|---|---|---|---|---|---|---|
| Various | A100 40GB (marketplace) | Spot | $0.7900/hr Cheapest | 1× GPU | — | — |
About Vast.ai A100 Cloud Pricing
Vast.ai is a GPU rental marketplace that connects GPU owners with renters, creating a decentralized compute market. Prices are set by supply and demand, often resulting in the lowest rates available anywhere.
Why Choose Vast.ai for A100
- Lowest GPU prices through marketplace competition
- Bid-based pricing for maximum cost optimization
- Massive GPU variety from consumer to enterprise
- Interruptible instances for batch workloads at deep discounts
Best suited for: Researchers and hobbyists comfortable with marketplace dynamics who want the absolute lowest cost per GPU-hour. Best for interruptible workloads like hyperparameter sweeps.
A100 Technical Overview
The A100 comes in 40 GB and 80 GB variants. The 80 GB version is essential for fine-tuning models over 13B parameters. MIG (Multi-Instance GPU) partitioning allows splitting a single A100 into up to 7 isolated GPU instances for smaller workloads.
Pricing Analysis
Vast.ai's cheapest A100 option starts at $0.7900/hr, which is 67% below the market average of $2.4011/hr.
Available instance types
Vast.ai delivers A100 across 1 instance variant: A100 40GB (marketplace). Each instance type varies in vCPU count, system memory, NVMe storage, and interconnect — the live rates in the pricing table below show the current per-GPU breakdown.
Note: Vast.ai pricing varies by demand — off-peak hours can be 50%+ cheaper. Reliability varies by host, so it's best suited for fault-tolerant workloads.
Market context: A100 pricing has dropped 30–50% since H100 became widely available. It remains the best value for workloads that don't require the raw throughput of Hopper-generation hardware.
Top Alternatives to Vast.ai for A100
Side-by-side cost comparison vs the cheapest Vast.ai A100 rate ($0.7900/hr).
| Provider | Price/hr | Type | vs Vast.ai |
|---|---|---|---|
| Shadeform | $0.7900/hr | On-Demand | 0% cheaper vs Vast.ai |
| TensorDock | $0.9500/hr | On-Demand | +20% more vs Vast.ai |
| Oblivus Cloud | $1.1500/hr | On-Demand | +46% more vs Vast.ai |
| Jarvis Labs | $1.7900/hr | On-Demand | +127% more vs Vast.ai |
| CoreWeave | $1.9500/hr | On-Demand | +147% more vs Vast.ai |
Calculate Your Exact A100 Cost
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Frequently Asked Questions
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Get the break-even math for Vast.ai A100 — calculated from real 90-day pricing data, not an LLM.