[clinic · EX-16] Price your own k

[akash-coded]

Exercise clinic. One long-running thread per exercise. Ask here rather than opening a
new thread — the answers accumulate where the next person will look for them.

Exercise: EX-16 — Price your own k · difficulty 🟡

What this exercise asks

Read the exercise first; this thread is for when you are stuck, not instead of it.

Three ways people get stuck on this one

1. Pricing tokens and stopping. Notebook 07 and #32 both make the point that generation tokens are roughly a third of a real bill.

2. Choosing k on full_chain_recall alone. It keeps climbing while answer_correct peaks and turns over around k≈12–16.

3. Ignoring context_precision, which is the column that shows the cost of a large k in quality rather than money.

How to ask here

Post the numbers you got, the config that produced them, and what you already tried.
A question with a measurement in it gets answered in one round trip; a question without one
takes three.

If you have finished it, post the write-up in Show and Tell with the
[solution · EX-16] prefix rather than here — this thread stays for people who are stuck.