FairStress: New benchmark evaluates fairness in LLM decision-making

Hugging Face introduced FairStress, a benchmark that measures demographic fairness in LLMs beyond final choices by testing how readily models switch decisions when challenged. Across models like Olmo, Llama, Qwen, Gemma, Claude, and GPT, the same persuasive arguments can cause asymmetric decision changes, revealing hidden biases.

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