Unverified50% confidenceFactExact time
When extracting order information from WhatsApp chat logs, a single regular expression is more stable than a carefully designed prompt, especially for patterned fields such as amounts, dates and product numbers.
1
Sources
50%
Confidence
Long-term
Relevance
10/18/2026
First Seen
Sources
With Temperature Set to 0, Regex Beat the Prompt
rss10/18/2026
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UnverifiedModel output is adapted to WhatsApp format: bold is converted from double asterisks to single asterisks, heading markers are removed, the length limit is 900 characters, and the chain of thought occasionally returned by reasoning models is discarded.67% similarUnverifiedWhatsApp supports exporting chat records as text files.66% similarUnverifiedPlacing a timestamp accurate to the second at the beginning of the prompt causes every request to differ from the first character, so the prefix cache can never hit and everything is billed at full price.58% similarUnverifiedPrefix caching improves inference efficiency by caching common prompt prefixes to reduce redundant computation.58% similarUnverifiedPrompt caching can avoid repeated charges for identical prefixes, because system prompts and retrieved document fragments tend to be highly repetitive across multiple conversation turns.58% similar
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