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The Acrux Core model gateway — routing, cost, caching, and performance.

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How much overhead does an LLM gateway add?

· 7 min read
LLM-ops platform

Putting a gateway in front of your model providers buys you a lot: one endpoint for every provider, cost accounting, caching, virtual keys, and budgets. But it raises an obvious worry — am I paying for that with latency? Every request now takes an extra hop, and for a user-facing app, milliseconds matter.

So we measured it. Same model, same prompt, the same call sent three ways, and the answer is clearer than we expected: the gateway's own software adds about 26 milliseconds. Everything else you might see is network distance — and that's in your hands, not ours.