opub journal

Notes from the donated compute ledger.

The latest launch updates, engineering tales, and stories about the open source projects putting funded model tokens to work.

3 posts / Updated May 21, 2026

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Latest May 26, 2026

The surprising depths of prompt caching

Prompt caching looks like a token discount. Underneath, it is KV tensors, prefix trees, inference economics, and a privacy model hiding in plain sight.

the opub team

15 min read

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