New AI-MI–supported preprint: PhantomEnvironments: Training LLM Agents in Fictional Worlds

Posted: October 12, 2026

A new preprint co-authored by AI-MI Associate Director Kilian Weinberger and AI-MI PhD students Albert Gong, Chao Wan and Christian Belardi (Cornell University), “PhantomEnvironments: Training LLM Agents in Fictional Worlds,” was posted to arXiv on September 30, 2026 (arXiv:2609.40221). Authors: Anmol Kabra, Swathi Saravana Selvam, Albert Gong, Chao Wan, Christian Belardi, Dongyoung Go, Katie Z. Luo and Kilian Q. Weinberger.

Figure 1 of arXiv:2609.40221: overview of PhantomEnvironments, RL training of an LLM search agent, and transfer to real-world search
Figure 1 from A. Kabra et al., arXiv:2609.40221 (2026).

Source: arXiv:2609.40221

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