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Open-weight model · Image and text to text

Cosmos-Reason2-2B

by NVIDIA nvidia/Cosmos-Reason2-2B

NVIDIA Cosmos Reason 2 is an open, customizable, 2B-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…

Parameters2.4B
Context
Weights4.9 GB
Licenseother
AccessAccess requested at publisher
Monthly Downloads840.4k

Runs On

What it takes to serve Cosmos-Reason2-2B (2.4B parameters): the memory its weights need at each precision, and the cheapest way to rent enough data-center GPUs to hold them.

PrecisionWeightsMemory neededCheapest setupPer hourAlso fits
16-bit 4.9 GB 5.9 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 2.4 GB 2.9 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 1.2 GB 1.5 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00

Memory is the weights at that precision plus 20% for the runtime and a short context; a long context needs more. Prices are the lowest on-demand hourly rates in the SAVRN Index, read Sep 18, 2026.

SAVRN's Notes on Cosmos-Reason2-2B

A robot planner does not need a rack. Cosmos-Reason2-2B, NVIDIA's 2.4B-parameter vision language model for physical AI, takes images and text and reasons about space, time and basic physics so an embodied agent can work out its next step. It wants 5.9 GB of memory at 16-bit, 2.9 GB at 8-bit and 1.5 GB at 4-bit. The cheapest listed setup, one MI300X at $1.85 per hour, leaves most of its 192 GB empty; run it on hardware you already own.

The license is listed as other with no summary, and access is gated, so read the publisher's terms and clear the gate before planning a deployment. Two more checks: the page lists no context length, so test your own frame counts and prompt sizes, and the weights derive from Qwen/Qwen3-VL-2B-Instruct, so what you learn about that base applies here.

Model Card

NVIDIA Cosmos Reason 2 is an open, customizable, 2B-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…

Excerpt from the card by NVIDIA, licensed other.

Identity and Version

Repository
nvidia/Cosmos-Reason2-2B
Publisher
NVIDIA
Task
Image and text to text
Modality
Image and text
Library
cosmos
Parameters
2.4B parameters
Languages
Not stated by the source
Revision
9ce19a195e423419c349abfc86fd07178b230561
First published
2025-12-12
Last updated
2026-04-30

Files and Weights

15 files, 4.9 GB in total. The weights are 1 file totalling 4.9 GB in safetensors.

Weights1 file · 4.9 GB
Configuration5 files · 8.1 KB
Tokenizer4 files · 11.5 MB
Documentation1 file · 35.0 KB
Other3 files · 649.4 KB
Repository1 file · 1.7 KB
Every file
FileTypeSizeSHA-256
model.safetensorsWeights4.9 GB
chat_template.jsonConfiguration5.5 KB
config.jsonConfiguration1.5 KB
generation_config.jsonConfiguration269 B
preprocessor_config.jsonConfiguration390 B
video_preprocessor_config.jsonConfiguration385 B
README.mdDocumentation35.0 KB
CR2 Performance by Category.pngOther37.4 KB
PAI_Bench_Leaderboard.pngOther473.6 KB
cosmos_cr2_2b_paiBench.pngOther138.4 KB
.gitattributesRepository1.7 KB
merges.txtTokenizer1.7 MB
tokenizer.jsonTokenizer7.0 MB
tokenizer_config.jsonTokenizer10.9 KB
vocab.jsonTokenizer2.8 MB

License and Download

License
other
Access
Access requested at publisher
Download size
4.9 GB
Request access from NVIDIA

NVIDIA grants access through its official repository on Hugging Face.

Built From

  • Derived from Qwen/Qwen3-VL-2B-Instruct
  • Described by arXiv:2312.14115
  • Described by arXiv:2406.10721
  • Described by arXiv:2503.06800
  • Described by arXiv:2603.18178

Memory Requirements

PrecisionWeights in memory
As published4.9 GB
16-bit4.9 GB
8-bit2.4 GB
4-bit1.2 GB

Weights only, from the published parameter count; the key-value cache and runtime add to this.

Questions About Cosmos-Reason2-2B

How much GPU memory does Cosmos-Reason2-2B need?

About 5.9 GB at 16-bit and 1.5 GB at 4-bit: the weights (2.4B parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run Cosmos-Reason2-2B on?

At 16-bit, 1x MI300X from $1.85 an hour; at 4-bit, 1x MI300X from $1.85 an hour, at the lowest on-demand prices the SAVRN Index lists.

What license is Cosmos-Reason2-2B released under?

other, as its publisher declares it. Read the license text before commercial use.

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