GPT-6 Astra Outperforms GPT-4o in New OpenAI Mental Health Benchmark

The benchmark was developed with input from more than 80 licensed psychologists and psychiatrists across 22 countries and 19 languages. Unlike previous evaluations that focused primarily on emergency safety, this system uses an expert rubric to reward behaviors such as seeking context and preserving user agency. Each synthetic case was reviewed by at least 3 experts, while a separate model, GPT-5.6 Sol, serves as the final judge to grade responses against the human-written criteria.