Abstract
Despite much progress in training AI systems to imitate human language, building agents that use language to communicate intentionally with humans in interactive environments remains a major challenge. We introduce Cicero, the first AI agent to achieve human-level performance in Diplomacy, a strategy game involving both cooperation and competition that emphasizes natural language negotiation and tactical coordination between seven players. Cicero integrates a language model with planning and reinforcement learning algorithms by inferring players' beliefs and intentions from its conversations and generating dialogue in pursuit of its plans. Across 40 games of an anonymous online Diplomacy league, Cicero achieved more than double the average score of the human players and ranked in the top 10% of participants who played more than one game.
Meta Fundamental AI Research Diplomacy Team (FAIR)†, Anton Bakhtin, Noam Brown, Emily Dinan, Gabriele Farina, Colin Flaherty, Daniel Fried, et al. 2022. “Human-Level Play in the Game of Diplomacy by Combining Language Models with Strategic Reasoning.” Science, November, eade9097. https://doi.org/10.1126/science.ade9097.
Oh, and it's also a slight downwards update on the difficulty of press diplomacy. For example, it might just be possible that you don't need much backstabbing for expert human-level diplomacy?
This doesn't mean that Cicero is honest -- notably, it can "change its mind" about what action it should take, given the dialogue of other players. For example, in the video, at 26:12 we see Austria saying to Russia that they will keep Gal a DMZ, but at 27:03 Austria moves an army into Gal.