arXiv Computation and Language August 27, 2026 By Matthew Flathers, Phuong Anh Nguyen, Jill Noorily, Julian Herpertz, Meiting Chen, Jasreen Multani, Samuel Powell, Mason Granof, Mark Kalinch, John Torous

HealthBench-Psych: A Mental Health Subset of OpenAI's HealthBench

Read the original on arXiv Computation and Language →

HealthBench-Psych is a mental‑health subset of the OpenAI HealthBench benchmark, created by filtering 5,000 physician‑rubric conversations for mental‑health relevance using an LLM‑applied rubric and validating the selection through two rounds of blinded clinician review. The resulting 610 conversations (12.2 % of the corpus) are released along with a pipeline, model responses, grades, and analysis code. Evaluation of 20 frontier and open models by a cross‑vendor panel of three LLM judges shows a statistically tied frontier cluster, measurable refusal behavior in two models, and near‑identical rankings across judges (τ ≥ 0.92).

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