AI cloud runtime

Modal

Modal is a serverless cloud compute platform designed for running Python code, AI model inference, and heavy data jobs on demand.

What the product actually does

Modal lets developers define cloud infrastructure directly in Python using function decorators. Functions scale automatically into cloud containers with access to high-end GPUs (NVIDIA A100, H100, L4).

It features sub-second container startup times and zero-copy shared memory volumes, enabling fast generative AI model serving without managing Kubernetes clusters.

How pricing works once you are inside

Metered strictly by the second for CPU, RAM, and GPU time consumed during active function execution.

Where it breaks down

Deeply tied to Python ecosystems; applications built in Go, Rust, or Node require custom packaging or bridge workflows.

What switching costs

Moderate. Modal's programming model uses custom Python decorators; transitioning to AWS SageMaker or Kubernetes requires refactoring orchestration code.

Sources

Modal public documentation, GPU performance benchmarks, and pricing charts, October 2026.