Source record

Published by Hacker News · workflow (T2 source). The original is at https://blog.mempko.com/keeping-the-kv-cache-warm-measuring-prompt-cache-eviction-across-anthropic-openai-and-google/.

Pipeline notes

The summary and note below are generated by the signal pipeline — they are Beyond Desk’s reading, not quotations from the source.

Blog post measures prompt cache eviction across Anthropic, OpenAI, and Google APIs, reporting that keepalive costs for agentic workflows run about 8x higher than expected due to cache eviction behavior.

Firsthand cross-provider cache eviction numbers let agent builders size budgets and pick APIs on real keepalive economics, not vendor framing.

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