{"type": "article", "title": "Construct validity of Claude Opus 4.8's System Card  – A commentary", "publisher": "Web Pulse", "url": "https://wpnews.pro/news/construct-validity-of-claude-opus-4-8-s-system-card-a-commentary", "original_source": "https://www.lesswrong.com/posts/vA9xEPquoWenprWT7/construct-validity-of-claude-opus-4-8-s-system-card-a", "published": "2026-06-12T00:52:31+00:00", "accessed": "2026-06-13", "id": "construct-validity-of-claude-opus-4-8-s-system-card-a-commentary"}