Can AI provide useful developmental editing feedback? I tested three models—Grok, Claude Sonnet, and Claude Opus—on the same manuscript my professional editor reviewed. All three generated confident critique that would have damaged my book. Grok mistook literary fantasy for pulp. Sonnet demanded structural rewrites my editor never mentioned. Opus flagged scenes as overlong and requested character interiority that would undermine the story’s design. Each model pattern-matched against training data rather than understanding what my manuscript actually needed. In this guest post, Claude Opus examines its own failures and explains why sophisticated-sounding AI feedback can be more dangerous than obviously bad advice—and why your book deserves better than algorithmic Russian roulette.