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Opus 5.5 vs Sonnet 5: the pricier model wrote my code for about half the cost

This story is from 2026-09-26. It is preserved in the archive; the latest stories are on the live feed.

Opus 5.5 lists at twice the price of Sonnet 5. In my coding agents it cost about half as much per line of code. It also replaced Fable 5.1 as my code reviewer, at about a third of the price. This post is the data behind that switch: five days of my own Claude Code transcripts, priced at API list pr…

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  1. 2026-09-26 05:54 · DEV Community — AI
    Opus 5.5 vs Sonnet 5: the pricier model wrote my code for about half the cost

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