Benchmarking OpenAI's APIs and Large Language Models for Repeatable, Efficient Question Answering Across Multiple Documents - Filipovska, Elena; Mladenovska, Ana; Bajrami, Merxhan; Dobreva, Jovana; Hillman, Vellislava; Lameski, Petre; Zdravevski, Eftim (Polish Information Processing Society, 2024)