Prompt to make Opus 5 act like a base model

A post on LessWrong details a prompt technique that changes how Claude responds. By leaving prompts incomplete—like 'see the below —'—the model completes the thought and behaves differently. The technique reportedly works on Opus 5 and 4.8 by leveraging how Claude models user input patterns and stylistic choices. The author shared examples and invited community exploration.

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