How does ChatGPT work?

"How does ChatGPT work?"
If your answer is "request → model → response" — you just failed the interview.
Behind every prompt: edge, gateway, orchestrator, context builder, tools, model router, safety checks both ways, observability, storage layer, GPU inference, streaming.
That's the engineering excellence happening behind your request routing.
Even in 2026 — engineering beats the model.
Save this. Use it in your next system design round.
Full walkthrough on HackProduct.com.

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Видео How does ChatGPT work? канала HackProduct