#prompt caching
3 articles tagged prompt caching. At twelve articles this topic starts lifting the whole site in search.
Timeline
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Anthropic's Claude Fable 5.1 — same sticker price, cache reads cut 75%
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What prompt caching is — from the second call, your input costs one-fortieth
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What AI token pricing is — why output costs about 5× input
All articles
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Tech · 4 min readAnthropic's Claude Fable 5.1 — same sticker price, cache reads cut 75%
Price — input $10 and output $50 unchanged; cache reads $1.00 → $0.25 (−75%)
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Tech · 4 min readWhat prompt caching is — from the second call, your input costs one-fortieth
Mechanism — an identical prefix yields identical intermediate values, which can be stored
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Tech · 5 min readWhat AI token pricing is — why output costs about 5× input
Billing is per token, with separate input and output rates — output typically costs four to five times input