Vast.ai is a GPU cloud marketplace where developers rent on-demand compute from 20,000+ GPUs across 40+ data centers for AI training, inference, and rendering.
About
Vast.ai is a GPU cloud marketplace that lets developers rent compute on demand from a pool of more than 20,000 GPUs hosted across 40+ data centers. Instead of committing to fixed cloud contracts, users pay market-driven rates set by supply and demand, billed per second with no minimum hours.
The platform positions itself as infrastructure that software agents can use directly: every GPU is provisioned through the same REST API, CLI, or Python SDK that human developers use. Getting started requires as little as $5 of credit and an API key, with no sales calls or contracts. Users search available GPUs by model, VRAM, price, and availability, then launch instances in seconds. Vast.ai also offers a model library with pre-configured templates for popular open-source models, and it lets individuals and data centers list their own hardware as hosts.
Key Features
Pricing & Fees
- Pricing: Market-based, per-second billing with no minimum hours; exact rates vary by GPU and are shown live on the Vast.ai pricing page. Accounts can start with as little as $5.
- Scale: 20,000+ GPUs, 40+ data centers, 68+ GPU types (ranging from RTX 3060-class to B200), and 700K+ monthly transactions.
- Compliance: Vast.ai states it is SOC 2 certified.
- Setup time: The company says users can go from sign-up to running GPU workloads in under five minutes.
Who It's For
Vast.ai is aimed at machine learning engineers, AI startups, and research teams that need GPU compute for training, fine-tuning, inference, rendering, or batch data processing without long-term commitments. It also suits developers building AI agents that provision their own infrastructure via API. Case studies on the site cover a consumer AI app company (Creatix Technology) scaling to 200,000 daily users and a medical AI firm (PAICON) using the platform for cancer-diagnostics research. Individuals and data centers with spare hardware can participate as hosts.
FAQ
What is Vast.ai?Vast.ai is a GPU cloud marketplace where users rent compute from 20,000+ GPUs across 40+ data centers at market-driven, per-second rates, using a console, CLI, Python SDK, or REST API.
How much does Vast.ai cost?Pricing is usage-based and set by supply and demand; users can start with $5 of credit. Interruptible instances are 50%+ cheaper than on-demand, and reserved instances offer up to 50% off for 1–6 month commitments. Live rates are on the official pricing page.
What platforms and tools does Vast.ai integrate with?It provides a CLI (installable via a one-line shell script), a Python SDK (`pip install vastai`), and a documented REST API with an OpenAPI spec, plus MCP and agent-skill files for AI coding agents.
What are the limitations of Vast.ai?Interruptible instances can be preempted and reclaimed, so they suit only fault-tolerant workloads with checkpointing; specific GPU availability depends on the marketplace at any moment.
Is Vast.ai secure and compliant?The company states it is SOC 2 certified and publishes security, compliance, and vulnerability-disclosure pages on its site.
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