Grokking the AI System Design Interview
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Inference Economics
Two Meters Are Running
Every generative AI design needs latency and cost estimates. Measure both against the product's requirements.
A latency meter tracks how fast an answer arrives. You measure it in TTFT, the time to first token, and time per output token. Both come from the previous lesson.
A cost meter accounts for billable input and output tokens, plus other service charges. A token is a unit of text
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