Inference cost
as a design property

Token economics, routing, caching and the engineering choices that decide whether an AI feature ships sustainable economics or a runaway bill. For teams scaling past the prototype.

Latest in LLM Cost Engineering

LLM Cost Routing: The Cheapest Passing Model Pattern

Routing each request to the cheapest model that passes its eval cuts inference spend 30 to 50 percent. Architecture, routing logic and eval discipline.

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LLM Cost Engineering

LLM Cost Routing: The Cheapest Passing Model Pattern

Routing each request to the cheapest model that passes its eval cuts inference spend 30 to 50 percent. Architecture, routing logic and eval discipline.

5 min read llm-routingcost
LLM Cost Engineering

Context Window Economics: The Hidden Bill on RAG

Stuffing context costs money on every call, even on tokens the model ignored. The discipline that keeps RAG context relevant, ranked and compressed.

6 min read context-windowrag
LLM Cost Engineering

Prompt Caching: Where It Pays Back and Where It Does Not

Provider-side prompt caching cuts cached input cost by up to 90 percent. The pattern that earns the discount and the configurations that waste it.

5 min read prompt-cachingllm-cost