Meta AI presents CICERO, an AI agent that can negotiate and cooperate with people. It is the first AI system that achieves human-level performance in the popular strategy game Diplomacy. Cicero ranked in the top 10 of participants on

Yannic Kilcher gives a great discussion of the accompanying Science paper. A second paper is freely available on arXiv. The source code is accessible on GitHub.

Meanwhile also DeepMind published an AI agent playing Diplomacy.