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ToM2Vec: Continuous Theory-of-Mind Tokens for Multi-Agent Coordination

Nithin Sivakumaran, Ali Payani, Hyunji Lee, Mohit Bansal, Elias Stengel-Eskin · 2026 · arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.29934 · cited by 0 works (OpenAlex) · open-access PDF

Indonesian

Untuk mengatasi tantangan ini, kami memperkenalkan ToM2Vec, yang memperkenalkan bukti-bukti tindakan ToM2Vec yang dihasilkan oleh masing-masing agen dan bertindak sebagai kondisioner untuk pemikiran dan tindakan agen tersebut melalui berbagai lingkungan yang mencakup kolaboratif, kolaboratif, dan interaktif, termasuk pertanyaan-pertanyaan konsisten (overcooked-AI, latihan multiparty negotiation promiscuity, HanM, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2Vec, ToM2

Machine translation (Meta M2M100); the English original follows.

Abstract

Forming an accurate theory-of-mind (ToM) is key to successful multi-agent collaboration and requires reasoning under uncertainty to capture multiple possible partner states. This is hard to do in the text representation space native to large language model (LLM) agents, which more easily describe a single partner state. To address this challenge, we introduce ToM2Vec, which learns to form abstract theories-of-mind in a rich latent space via a fixed budget of continuous reasoning tokens. During training, supervision for these tokens comes from the partner's actual thoughts, which the ToM tokens are trained to abstract and match. At test-time, ToM tokens are generated by each agent and act as conditioners for that agent's thoughts and actions. Across several environments covering collaborative, competitive, and mixed-motive settings (Overcooked-AI, multiparty negotiation, Decrypto, Hanabi, and Collab Escape/Capture), we evaluate ToM2Vec's ability to support multi-agent interactions and collaboration, finding consistent improvements over the base model and a variety of competitive trained and prompted baselines. We show that latent reasoning is critical, with performance dropping when reasoning is expressed in text. Moreover, we show that ToM2Vec training generalizes to partner model families not seen at train-time, including a proprietary model (GPT-5.4). In our analysis, we provide evidence that the latent tokens encode a ToM, rather than task-specific information: ToM2Vec's tokens improve the agent's ability to directly answer questions about partner beliefs, desires, and next actions.

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Topics: Computer science, ENCODE, Representation (politics), Variety (cybernetics), Space (punctuation), Artificial intelligence

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