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Why my prompt worked yesterday and failed today, same text

Drove me up a wall. Identical prompt, one day a clean answer, next day a mess, and I kept editing the prompt chasing a ghost. The prompt was never the problem, it was sampling variance plus a prompt that only worked when the model happened to go down the right path. The fix was not lowering randomn…

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  1. 2026-10-30 07:15 · r/PromptEngineering
    Why my prompt worked yesterday and failed today, same text

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