GPU Cloud FAQ
Everything you need to know about renting GPU cloud for AI and machine learning
What is GPU cloud and how does it work?
GPU cloud (or cloud GPU) is a service that lets you rent powerful graphics cards remotely over the internet. Instead of buying expensive hardware, you pay hourly for GPU access from providers like RunPod, Vast.ai, or Vultr. Your workloads run on their servers and you access the compute via SSH or a web terminal.
How much does GPU cloud cost per hour?
Prices vary widely by GPU model and provider. As of 2026, H100 80GB typically ranges from $2.50 to $3.99/hr, A100 80GB from $1.80 to $3.20/hr, and RTX 4090 from $0.44 to $0.79/hr. Use BestGPUCloud to compare real-time prices across 15+ providers and find the cheapest option.
Which GPU cloud provider is the cheapest?
No single provider is always cheapest — prices fluctuate with availability. RunPod and Vast.ai consistently offer the lowest spot/community prices. Latitude.sh and CherryServers offer better uptime and dedicated hardware at slightly higher rates. Always compare on BestGPUCloud before renting to find today's best deal.
What is the difference between spot and on-demand GPU instances?
On-demand (reserved) instances guarantee availability and uptime for as long as you pay — ideal for production workloads. Spot (community/interruptible) instances are unused capacity sold at lower prices but can be terminated with short notice. Spot instances are 30–70% cheaper and work great for training runs with checkpointing.
Which GPU is best for training large language models (LLMs)?
The H100 80GB SXM is the gold standard for LLM training due to its 3.35 TB/s memory bandwidth and NVLink interconnect. For smaller models under 13B parameters, A100 80GB or even RTX 4090 24GB can be cost-effective. The right choice depends on your model size and budget — see our GPU comparison pages for detailed analysis.
Which GPU should I use for Stable Diffusion?
For Stable Diffusion and image generation (SDXL, Flux), an RTX 4090 (24 GB) gives excellent performance at the lowest cost. If you need faster batch generation or run FLUX.1, an A100 40GB or H100 will significantly cut your per-image time. Check our Stable Diffusion GPU guide for benchmarks.
Can I run GPU cloud from Brazil / outside the US?
Yes. All major providers (RunPod, Vast.ai, Latitude.sh, Vultr) accept international customers and credit cards. Most have US-East data centers with 150–200ms latency from Brazil/LATAM. Latitude.sh and CherryServers also offer data centers in Brazil and Europe for lower latency. Payment via Stripe in USD is standard.
How do I save money on GPU cloud?
(1) Use spot/community instances for interruptible workloads — savings of 40–70% vs on-demand. (2) Compare prices across providers on BestGPUCloud before every run. (3) Right-size your GPU: not every task needs an H100. (4) Use mixed-precision (fp16/bf16) to fit larger models into cheaper GPUs. (5) Set price alerts to catch deals when they appear.
What is the difference between H100 SXM and H100 PCIe?
Both have 80 GB HBM3 memory but differ in interconnect. H100 SXM5 uses NVLink with 3.35 TB/s bandwidth — ideal for multi-GPU training. H100 PCIe uses standard PCIe 5.0 with lower bandwidth (~2.0 TB/s) and is cheaper. For single-GPU inference or small training runs, the PCIe version offers better value.
Do GPU cloud providers offer free trials?
RunPod offers new users a small credit to test the platform. Vast.ai has no formal free tier but costs are very low (starting at $0.10/hr for older GPUs). Lambda Labs occasionally offers academic credits. Most providers let you start with $10–$50 and shut down instantly, making the entry cost low.
Is it safe to run sensitive workloads on GPU cloud?
Community/spot instances (Vast.ai, RunPod community) are shared hardware — not suitable for sensitive data. For compliance-sensitive workloads, use dedicated bare-metal providers like Latitude.sh or CherryServers which give you an isolated physical server. Always encrypt data at rest and in transit, and review the provider's SOC 2 / ISO 27001 certifications.
How do price alerts work on BestGPUCloud?
Set up a price alert for any GPU model and target price. When a listing drops to your threshold, you'll receive an instant email (Premium: SMS and Slack). Alerts are checked every 5 minutes. This is useful for catching flash deals on H100s or A100s that sell out within minutes. Alerts are available on the Premium plan at $9.99/month.
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