AI Sandbox pricing comparison (2026)

Finding the cheapest AI sandbox provider involves more than just comparing headline CPU rates, as factors like billing models, idle behavior, deployment models, and GPU access play significant roles in determining the actual cost. Northflank emerges as the most affordable platform, offering the lowest published PaaS CPU rate at $0.01667/vCPU-hr, billed per second, and is the only provider with self-serve BYOC (Bring Your Own Cloud) and publicly available pricing. The cost difference between platforms becomes more pronounced at scale, with Northflank providing significant savings for large deployments, such as 200 concurrent sandboxes costing $7,200 on PaaS, compared to over $35,000 on other platforms. Northflank and Modal are also notable for supporting GPU workloads in sandbox environments, but Northflank remains the more cost-effective option due to its transparent pricing and flexible deployment models. The complexity of AI sandbox pricing is further illustrated by varied billing practices, such as charging only for active CPU time or billing for provisioned resources, which necessitates a comprehensive cost comparison beyond mere CPU rates.