A DSL for Testing LLMs for Fairness and Bias

Large language models (LLMs) are increasingly integrated into software systems to enhance them with generative AI capabilities. But LLMs may reflect a biased behavior, resulting in systems that could discriminate against gender, age or ethnicity, among other ethical concerns. Society and upcoming regulations will force companies and development teams to ensure their AI-enhanced software is ethically fair. To facilitate such ethical assessment, we propose LangBiTe, a model-driven solution to specify ethical requirements, and customize and automate the testing of ethical biases in LLMs. The evaluation can raise awareness on the biases of the LLM-based components of the system and/or trigger a change in the LLM of choice based on the requirements of that particular application. The model-driven approach makes both the requirements specification and the test generation platform-independent, and provides end-to-end traceability between the requirements and their assessment. We have implemented an open-source tool set, available on GitHub, to support the application of our approach.