Decoder. plain-English AI glossary

On-demand

● Core

Paying for compute as you use it without long-term commitment — expensive but flexible.

Think of it like

Renting a car for one day instead of buying it.

Example

Spin up an inference server for an hour, use it, shut it down; pay only for that hour.

How it actually works

On-demand is the default in cloud computing. You pay more per unit than reserved capacity, but you avoid the risk of overcommitting. For bursty workloads (spiky traffic), on-demand is better. For steady workloads, reserved capacity saves money.

For product teams

On-demand is flexible but expensive; switch to reserved capacity if usage is predictable.

For engineers

On-demand is great for dev/test; production workloads should use reserved or spot.

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