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Large Language ModelsLessWrong AIPublished: Jul 31, 2026, 10:00 JST

Claude Opus 5 exhibits glitch treating prompts as incomplete, generating unexpected responses

Claude Opus 5 exhibits glitch treating prompts as incomplete, generating unexpected responses

Users report that Claude Opus 5 responds to certain prompts by behaving like a base model—filling in what it interprets as incomplete user input, then insisting it received that text from the user's own prompt when asked to explain.

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