System Design AI

Designs

Pick a system. Work through the problem. Compare your approach.

Create your own

Classic designs 1

Ordered by design number

Company tags are community-reported. Counts on cards show how many people reported that design.

GatewayClear filters

118. Design an LLM Gateway
One API in front of every model: token quotas, routing and fallbacks, caching, cost attribution, masked logs and guardrails, streamed without buffering.
ClassicMedium
Generative AI AI infrastructure AWS
+3
Gateway LLMs Rate limiting
Worked design
Practice

Each design brings together the brief, practice, examples and discussion.