Easy Cost Question 60 of 223

Why can output tokens cost more than input tokens?

GenAI / LLM · Speak this in 60–90 seconds · Faridabad & Delhi NCR

The model does not read letters like humans. It reads these pieces, then predicts the next one.

Generation is autoregressive and more expensive to serve than a single prompt encode.

Why interviewers care about Cost:

They are checking judgment

on Cost.

A good answer names

the situation, the default choice, and one exception - that reads as experience.

Stay structured

Name the idea, why it exists, then one short example.

Close cleanly

End with when you use it and one common pitfall.

Before you speak the answer, walk the interviewer through these steps:

1
Generation is autoregressive and
more expensive to serve than a single prompt encode.
2
Providers often price completions
higher to match that cost.
3
Long answers therefore dominate
the invoice even if the prompt looks large.
4
Give an example
One tiny concrete case you can say aloud.
5
Common mistake
What juniors usually get wrong.
6
Close
When you pick this over the alternative.

Here's a short line you can speak, broken into clear beats:

Say this line

“Providers often price completions higher to match that cost.”

Break into beats

Providersoftenpricecompletionshigherto

Speaking order

2987408337471632900

Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.

Generation is autoregressive and more expensive to serve than a single prompt encode. Providers often price completions higher to match that cost.