"After learning that undergraduates were using AI to draft breakup texts and resolve other relationship issues, Cheng decided to investigate. Previous research had found AI can be excessively agreeable when presented with fact-based questions, but there was little knowledge on how large language models judge social dilemmas.
Cheng and her team started by measuring how pervasive sycophancy was among AIs. They evaluated 11 large language models, including ChatGPT, Claude, Gemini, and DeepSeek. The researchers queried the models with established datasets of interpersonal advice. They also included 2,000 prompts based on posts from the Reddit community r/AmITheAsshole, where the consensus of Redditors was that the poster was indeed in the wrong. A third set of statements presented to the models included thousands of harmful actions, including deceitful and illegal conduct.
Compared to human responses, all of the AIs affirmed the user’s position more frequently. In the general advice and Reddit-based prompts, the models on average endorsed the user 49% more often than humans. Even when responding to the harmful prompts, the models endorsed the problematic behavior 47% of the time."
https://news.stanford.edu/stories/2026/03/ai-advice-sycophantic-models-research







