Cosmos 3

Cosmos 3 is an open world foundation model released by NVIDIA at GTC Taipei during COMPUTEX 2026 (May 31, 2026). It is the first omni-model in the Cosmos family with native reasoning, world generation and action generation in a single Mixture-of-Transformers architecture (separate transformer blocks for reasoning and generation).

The model handles input and output across modalities: text, image, video, ambient sound and action data (numerical — joint angles, gripper positions, trajectory points). Native action generation enables Cosmos 3 to serve as a World Action Model (WAM) backbone for post-training robot policies.

The family includes: Cosmos 3 Super (65B parameters, highest physics accuracy, for robotics and AV post-training), Cosmos 3 Nano (16B, lightweight, optimized for fast inference and policies), and the announced Cosmos 3 Edge (on-device, forthcoming). Additional variants on Hugging Face: Cosmos3-Super-Image2Video, Cosmos3-Super-Text2Image, Cosmos3-Nano-Policy-DROID.

Weights and code are released under the OpenMDW 1.1 license (Linux Foundation), permitting training, modification, redistribution and deployment. A Cosmos 3 Nano post-trained policy ranked first on the RoboLab and RoboArena leaderboards, and Cosmos 3 variants lead the open-weights leaderboards on Artificial Analysis, Physics-IQ, R-Bench, PAI-Bench, VANTAGE-Bench and the TAR challenge. Applications: robot policy training, synthetic data generation, environment simulation for autonomous vehicles, video analytics agents for industrial use.