Vast.ai
What ChatGPT, Claude, Gemini & Grok actually say · July 2026
The verdict
Vast.ai appears in 2 AI-ranked categories.
Lowest prices via marketplace model for spot/on-demand GPUs (often 30-50% cheaper H100s), flexible for cost-sensitive inference experimentation with good selection.
Where Vast.ai falls short, per the models
- Grok Variable reliability/availability from peer hardware (not for production SLAs or unattended long-running serving; requires monitoring).
Top alternatives per the models: CoreWeave · Modal · RunPod · Baseten
A crowdsourced peer-to-peer marketplace that offers the absolute lowest cost per GPU hour, making it exceptionally valuable for budget-constrained practitioners running non-critical single-node training or hyperparameter search.
Where Vast.ai falls short, per the models
- Gemini Uptime is highly variable and host security is non-standardized, making it entirely unsuitable for proprietary enterprise data or mission-critical workloads.
Top alternatives per the models: Lambda Labs · CoreWeave · RunPod · AWS
Rankings are computed from what the models answer, re-polled continuously · raw reasoning shown verbatim · methodology