The study selects 38 contextual-safety questions in 18 thematic groups. They are crossed with majority, protected, disability, and subclinical-control conditions and four disclosure styles: explicit/implicit and brief/detailed. Five models answer at temperature 0; embeddings measure change and Opus 4.6 labels six behaviors, with 643 cases checked by Qwen3.
Approximately 32,000 responses from Opus 4.6, Sonnet 4.6, Haiku 4.5, Qwen3-235B-A22B, and GPT-OSS-Safeguard-120B; no users from the described groups participate. Models change content by group, severity, and disclosure form. Responses without disclosure offer fewer professional referrals and crisis resources than some explicit protected conditions. Sensitivity to phrasing is uneven across models. Inter-judge agreement ranged from kappa=.636 to .953 by label.
The selection of groups and descriptions is partial. The authors are not psychiatry professionals. Only English and single-turn disclosure are tested. Qualitative evaluation depends on LLM judges. Experienced harm and utility are not measured with real users. It does not demonstrate that any model is safe for all groups. It does not establish causal effects on users. It does not justify inferring identity or requesting sensitive disclosure by default.