Unverified50% confidenceSolutionExact time
Once the cached content changes, all subsequent tokens are invalidated and recomputed, so fixed content should be placed at the front of the prompt and variable content at the back.
1
Sources
50%
Confidence
Long-term
Relevance
10/19/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe fix for the cache point not moving forward is to place the cache point on the last content block of the newest message, regardless of its role.77% similarUnverifiedIn the cache reuse mechanism, once the request prefix is modified, the cache for all content after it becomes invalid; modifying tools or other parts of the request will still affect reuse.75% similarUnverifiedPrefix caching is extremely sensitive to input stability; as long as any single token in the prefix is modified or inserted, the cache is invalidated and all subsequent content must be recomputed.73% similarUnverifiedEvery repeated upload of a document re-counts the document's content toward token consumption.73% similarUnverifiedPrefix caching skips redundant computation by reusing previously computed KV cache for identical prefixes from prior requests, but any formatting change, order perturbation, or insertion of content in the middle will invalidate the cache.70% similar
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