MultiChallenge: A Realistic Multi-Turn Conversation Evaluation Benchmark Challenging to Frontier LLMs. - Kaustubh Deshpande; Ved Sirdeshmukh; Johannes Baptist Mols; Lifeng Jin; Ed-Yeremai Hernandez-Cardona; Dean Lee; Jeremy Kritz; Willow E. Primack; Summer Yue; Chen Xing (ACL (Findings), 2025)