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Equation 8 · Part 5 · The Hidden Infrastructure Bill Behind Every RAG Answer

=

CLC(Q)=Q⋅pin⋅EC_{\mathrm{LC}}(Q) = Q \cdot p_{\mathrm{in}} \cdot E
=

What this part means

The expressions on both sides represent the same quantity under the stated assumptions.

Its job in the formula

The equals sign connects the complete expression on the left with the complete expression on the right. Both sides must have compatible units.

The passage around this formula

where S is index size in gigabytes, r(S) is Pinecone’s documented read units per query as a function of that size, Q is monthly query volume, and pstorep_{\mathrm{store}} , prup_{\mathrm{ru}} , and prerankp_{\mathrm{rerank}} are the published per-unit rates given earlier. Set against it, the cost of skipping retrieval and instead inlining a fixed block of extra context on every single call is CLC(Q)=Q⋅pin⋅EC_{\mathrm{LC}}(Q) = Q \cdot p_{\mathrm{in}} \cdot E. where E is the number of extra context tokens each call would need to carry in place of what retrieval would otherwise have selected, and pinp_{\mathrm{in}} is the applicable — possibly long-context-tiered — input price.

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Learn the underlying idea

An equals sign says that the expression on its left and the expression on its right have the same value under the stated definitions and assumptions.

Open the illustrated equality: what the equals sign claims guide →

Sources cited in the article section

These citations provide research context; check each source for the exact claim it supports.