名字影响模型生成，黑人姓名引发更多元输出

A name alone measurably reshapes a language model's next-token distribution before a single token is sampled. We measure full-vocabulary Shannon entropy of the next-token distribution across six open-weight model families on 5,760 sentence-completion prompts in which race and gender are signaled only by a first name. Black-associated names co-occur with higher first-token entropy and more diverse continuations than White-associated names -- directionally consistent in all six instruction-tuned models under shared raw-text input, all six base checkpoints, and, for output diversity, five of six models under native chat formatting -- opposite to the homogeneity bias documented under explicit group labels (Lee et al., 2024). The gap persists under tokenization and frequency controls and on a frequency-matched name subset; per-prompt effects are small (d = 0.06-0.16) but uniformly signed (template-level paired d = 0.66-1.08). Gender points the other way, additively with race. First-token entropy attenuates sharply under chat-formatted input, and explicit group-label probing is mostly null or reversed; a variance-matched comparison locates the output-diversity disparity in heterogeneity across name-conditioned continuations -- a dimension a fixed group label cannot express. Probing methodology shapes not only whether a disparity is detected but which direction it takes.