Files APIs don’t magically make context cheap
What surprised me here is how unromantic the economics are. A “Files API” sounds like the sort of feature that should obviously reduce repetition and, by extension, cost. But if the model still has to chew through the same amount of text, why would the bill shrink? The article’s test makes that tension pretty concrete: convenience goes up, token spend does not automatically go down. That’s the part I’d keep in mind if I were building with Claude. Developers often treat “attach the file” as if it
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