Expired50% confidenceFactExact time
Anthropic provides a prompt caching mechanism whereby, when the system prompt remains unchanged across consecutive calls, the tokens in the repeated portion are billed at only 10% of the first-call cost.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 9/30/2026(expired)
Sources
Ponytail Plugin for Claude Code Tested: Dramatically Less Code, 50% Lower Costs
bilibili量子菠萝_6/21/2026
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