SIMA 2: An Agent that Plays, Reasons, and Learns With You in Virtual 3D Worlds

November 13, 2025 Research

SIMA Team

Last year, we introduced SIMA (Scalable Instructable Multiworld Agent), a generalist AI that could follow basic instructions across a wide range of virtual environments. SIMA was a crucial first step in teaching AI to translate language into meaningful action in rich, 3D worlds.

Today we’re introducing SIMA 2, the next milestone in our research creating general and helpful AI agents. By integrating the advanced capabilities of our Gemini models, SIMA is evolving from an instruction-follower into an interactive gaming companion. Not only can SIMA 2 follow human-language instructions in virtual worlds, it can now also think about its goals, converse with users, and improve itself over time.

This is a significant step in the direction of Artificial General Intelligence (AGI), with important implications for the future of robotics and AI-embodiment in general.

• Reasoning
• Generalization
• Self-Improvement
• Next steps
• Responsibility

The Power of Reasoning

The first version of SIMA learned to perform over 600 language-following skills, like “turn left,” “climb the ladder,” and “open the map,” across a diverse set of commercial video games. It operated in these environments as a person might, by “looking” at the screen and using a virtual keyboard and mouse to navigate, without access to the underlying game mechanics.

With SIMA 2, we’ve moved beyond instruction-following. By embedding a Gemini model as the agent's core, SIMA 2 can do more than just respond to instructions, it can think and reason about them.

SIMA 2’s new architecture integrates Gemini’s powerful reasoning abilities to help it understand a user’s high-level goal, perform complex reasoning in pursuit, and skillfully execute goal-oriented actions within games.

In testing, we have found that interacting with the agent feels less like giving it commands and more like collaborating with a companion who can reason about the task at hand.