06 Answers cut in half

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Goal

Ask how long until my refund arrives and get a top chunk that contains the full answer, including 5 working days.

A fixed-size chunker doesn't know where sentences end. Here the best match stops at "…Refunds go back" — and the next chunk, which says how long it takes, starts with no mention of refunds at all. Neither chunk answers the question on its own.

Overlap repeats the end of each chunk at the start of the next, so a sentence near a boundary appears whole in at least one of them. It costs more chunks and more storage. Smarter chunkers split on sentences or headings instead.

Try it

Look at the top chunk, then add overlap and look again. The bar above each page shows how the chunks now overlap.

Go to the terminal

Hint

With 30-word chunks and no overlap, the answer is split across two chunks. chunk --size 30 --overlap 50, embed, and search again.

Show a solution

search "how long until my refund arrives"
chunk --size 30 --overlap 50
embed
search "how long until my refund arrives"

This interactive environment needs JavaScript. Everything you need to read is on this page, and the solution works the same way for real.

RAG

Starting RAG…