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Opus 5.5 Made Cache Reads 60% Cheaper. I Redid the Math on My Text-to-SQL Architecture

This story is from 2026-09-23. It is preserved in the archive; the latest stories are on the live feed.

TL;DR: Claude Opus 5.5 came out yesterday with cache reads at $0.20 per million tokens, 60% cheaper than Opus 5. I redid the cost math for my text-to-SQL CRM assistant. For one design choice, the cost gap between "retrieve only the relevant schema" and "send the whole schema every time, cached" shr…

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  1. 2026-09-23 04:55 · DEV Community — AI
    Opus 5.5 Made Cache Reads 60% Cheaper. I Redid the Math on My Text-to-SQL Architecture

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