Vast.ai B300 Pricing Options
All available B300 instance types on Vast.ai, sorted by lowest hourly rate.
| Region | Instance | Type | Price/hr | GPUs | vCPUs | RAM |
|---|---|---|---|---|---|---|
| Various | B300 192GB (marketplace) | Spot | $5.4900/hr Cheapest | 1× GPU | — | — |
About Vast.ai B300 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 B300
- 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.
Pricing Analysis
Vast.ai's cheapest B300 option starts at $5.4900/hr, which is 4% below the market average of $5.7264/hr.
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.
Top Alternatives to Vast.ai for B300
Side-by-side cost comparison vs the cheapest Vast.ai B300 rate ($5.4900/hr).
| Provider | Price/hr | Type | vs Vast.ai |
|---|---|---|---|
| Lambda Labs | $4.9500/hr | On-Demand | -10% cheaper vs Vast.ai |
| Shadeform | $4.9500/hr | On-Demand | -10% cheaper vs Vast.ai |
| TensorDock | $4.9900/hr | On-Demand | -9% cheaper vs Vast.ai |
| CoreWeave | $5.2000/hr | On-Demand | -5% cheaper vs Vast.ai |
| Together AI | $5.2500/hr | On-Demand | -4% cheaper vs Vast.ai |
Calculate Your Exact B300 Cost
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Frequently Asked Questions
Not sure which GPU configuration fits your budget?
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Is a reserved contract worth it here?
Get the break-even math for Vast.ai B300 — calculated from real 90-day pricing data, not an LLM.