Cosmos-Reason2

Cosmos | Code

Model Overview

Description:

NVIDIA Cosmos Reason 2 is an open, customizable, 32B-parameter reasoning vision language model (VLM) for physical AI and robotics that enables robots and vision AI agents to reason like humans, using prior knowledge, physics understanding and common sense to understand and act in the real world. This model understands space, time, and fundamental physics, and can serve as a planning model to reason what steps an embodied agent might take next.

New features with Cosmos Reason 2:

• Enhanced physical AI reasoning with improved spatio-temporal understanding and timestamp precision.
• Supports object detection with 2D/3D point localization and bounding box coordinates with reasoning explanations and labels.
• Improved long-context understanding up to 256K input tokens.

Use cases:

• Video analytics AI agents — Extract valuable insights and perform root-cause analysis on massive volumes of video data. These agents can be used to analyze and understand recorded or live video streams across city and industrial operations. Jumpstart your development of video analytics AI agents by using the NVIDIA Blueprint for video search and summarization (VSS) with Cosmos Reason as the VLM.
• Data curation and annotation — Enable developers to automate high-quality curation and annotation of massive, diverse training datasets. Experience NVIDIA Cosmos Curator, powered by Cosmos Reason, a framework that enables developers to quickly filter, annotate, and deduplicate large amounts of sensor data necessary for physical AI development.
• Robot planning and reasoning — Act as the brain for deliberate, methodical decision-making in a robot vision language action (VLA) model. Now robots such as humanoids and autonomous vehicles (AV) can interpret environments and complex commands, break them down into tasks and execute them using common sense, even in unfamiliar environments. Explore the NVIDIA Isaac GR00T-Dreams blueprint, which generates vast amounts of synthetic trajectory data using NVIDIA Cosmos world foundation models.

Explore the Cosmos Cookbook, a technical guide that delivers end-to-end workflows, implementation recipes, and detailed examples for building, fine-tuning, and deploying Cosmos Reason in production-ready environments.

The model is ready for commercial use.

Model Developer: NVIDIA

Model Versions

The Cosmos-Reason2 includes the following model:

• Cosmos-Reason2-2B: Given a text prompt and an input video, think and generate the answer with respect to the input text prompt and video.
• Cosmos-Reason2-8B: Given a text prompt and an input video, think and generate the answer with respect to the input text prompt and video.
• Cosmos-Reason2-32B: Given a text prompt and an input video, think and generate the answer with respect to the input text prompt and video.

Model Quality Performance

[04/28/2026] For comparative evaluation, we present benchmark scores using the Physical AI Bench Leaderboard.

We also evaluated Cosmos-Reason2 against Qwen3-VL across the following domains and categories: General, Robotics, Self-Driving, and Smart Spaces.