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.
Although impressive, it is worth to notice that Cicero only played blitz games (in which each turn lasts 5 minutes, and players are not usually very invested).
An AI beating 90% of players in blitz chess is less of an achievement than an AI beating 90% of players in 40 min chess; and I expect the same to be true for Diplomacy. Also, backstabbing and elaborate schemes are considerably rarer in blitz.
I would be very curious to see Cicero compete in a Diplomacy game with longer turns.