Two days after releasing what analysts call the most powerful open-source AI model ever created, researchers from China's Moonshot AI logged onto Reddit to face a restless audience. Three Moonshot team members participated under the usernames ComfortableAsk4494, zxytim, and ppwwyyxx. A Kimi co-host answered with a design choice that matters for anyone building agent systems in enterprise settings. As models become more tool-using and task-decomposing, labs will spend more of their budget training models to behave well as agents — not merely to predict tokens. A Kimi co-host acknowledged that each new release brings some personality change and described personality as subjective and hard to evaluate.