Evaluating Generalization Capabilities of LLM-Based Agents in Mixed-Motive Scenarios Using Concordia - Smith, Chandler; Abdulhai, Marwa; Díaz, Manfred; Tesic, Marko; Trivedi, Rakshit; Vezhnevets, Sasha; Hammond, Lewis; Clifton, Jesse; Chang, Minsuk; Duenez-Guzman, Edgar; Agapiou, John; Matyas, Jayd; et al. (Advances in Neural Information Processing Systems, 2025)