A high-traffic prompt is too expensive and too slow. Walk me through optimizing cost and latency without sacrificing quality.

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The full answer covers the core mechanics, when this pattern wins, and the trade-offs interviewers most often probe. Read it once at your own pace, then try to recall the structure from memory before the interview. Pro also includes this question's interview lens - the likely follow-up probes and what you can say in the room.

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