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SIMA 2: A Generalist Embodied Agent for Virtual Worlds

Published: December 4, 2025 | arXiv ID: 2512.04797v1

By: SIMA team , Adrian Bolton , Alexander Lerchner and more

BigTech Affiliations: Google

Potential Business Impact:

Lets robots learn new skills by playing games.

Business Areas:
Virtual World Community and Lifestyle, Media and Entertainment, Software

We introduce SIMA 2, a generalist embodied agent that understands and acts in a wide variety of 3D virtual worlds. Built upon a Gemini foundation model, SIMA 2 represents a significant step toward active, goal-directed interaction within an embodied environment. Unlike prior work (e.g., SIMA 1) limited to simple language commands, SIMA 2 acts as an interactive partner, capable of reasoning about high-level goals, conversing with the user, and handling complex instructions given through language and images. Across a diverse portfolio of games, SIMA 2 substantially closes the gap with human performance and demonstrates robust generalization to previously unseen environments, all while retaining the base model's core reasoning capabilities. Furthermore, we demonstrate a capacity for open-ended self-improvement: by leveraging Gemini to generate tasks and provide rewards, SIMA 2 can autonomously learn new skills from scratch in a new environment. This work validates a path toward creating versatile and continuously learning agents for both virtual and, eventually, physical worlds.

Country of Origin
🇺🇸 United States

Page Count
40 pages

Category
Computer Science:
Artificial Intelligence