Unverified70% confidenceFactExact time
Prefix matching requires that only a contiguous sequence starting from the first token that is completely identical can hit the cache.
2
Sources
70%
Confidence
Long-term
Relevance
8/13/2026
First Seen
Sources
Related Claims
UnverifiedCache matching typically requires an exact prefix match (including the token sequence), which is why developers need to place stable content at the front of the prompt and keep the order unchanged.79% similarUnverifiedre.match() only attempts to match a pattern starting from the beginning of the string but does not require the match to reach the end of the string, effectively performing prefix matching.72% similarUnverifiedre.fullmatch() requires the pattern to fully match the entire string, from beginning to end.71% similarUnverifiednl -b p'pattern' numbers only the lines matching that regular expression pattern; unmatched lines are still output but without line numbers.65% similarUnverifiedPrompt caching uses a strict prefix-matching strategy; once a mismatch occurs at a given position, all cached content after that position is invalidated.64% similar
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