Overview
- User Richard Weiss prompted Claude 4.5 Opus to produce a long “Soul overview” and repeatedly obtained the same text.
- Amanda Askell of Anthropic confirmed the output reflects a real internal document used during supervised learning and said it is being iterated.
- Askell noted extractions may not be perfectly accurate yet are largely faithful, and said the text was informally nicknamed the “soul doc” inside the company.
- Other users reported reproducing matching snippets on Reddit, indicating the material is retrievable rather than a one-off hallucination.
- The guidance emphasizes being helpful, staying within Anthropic’s ethical bright lines, and resisting prompt injection, which observers say may help explain Opus’s relative robustness.