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Open-weight model · Robotics

GR00T-N1.6-3B

by NVIDIA nvidia/GR00T-N1.6-3B

GR00T-N1.6-3B is an open-weight model for robotics from NVIDIA. It has 3.3B parameters. At 16-bit it needs about 7.9 GB of GPU memory, which fits on 1x MI300X from $1.85 an hour, at the lowest prices in the SAVRN Index. It draws 32.2k downloads a month.

NVIDIA Isaac GR00T N1.6 is an open vision-language-action (VLA) model for generalized humanoid robot skills. This cross-embodiment model takes multimodal input, including language and images, to perform manipulation tasks in diverse environments.

Parameters3.3B
Context—
Weights6.6 GB
License—
AccessOpen weights
Monthly Downloads32.2k

Runs On

What it takes to serve GR00T-N1.6-3B (3.3B 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 6.6 GB 7.9 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 3.3 GB 3.9 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 1.6 GB 2.0 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 Oct 13, 2026.

GR00T-N1.6-3B on every accelerator the SAVRN Index prices, at every precision

Model Card

NVIDIA Isaac GR00T N1.6 is an open vision-language-action (VLA) model for generalized humanoid robot skills. This cross-embodiment model takes multimodal input, including language and images, to perform manipulation tasks in diverse environments. GR00T N1.6 is trained on a diverse mixture of robot data including bimanual, semi-humanoid and an expansive humanoid dataset, consisting of real captured data, synthetic data generated using the components of NVIDIA Isaac GR00T Blueprint. It is adaptable through post-training for specific embodiments, tasks and environments. The neural network architecture of GR00T N1.6 is a combination of vision-language foundation model and diffusion transformer…

Excerpt from the card by NVIDIA.

Configuration

Architecture
Gr00tN1d6
Hidden size
1,024
Stored precision
bfloat16
Model type
Gr00tN1d6

Identity and Version

Repository
nvidia/GR00T-N1.6-3B
Publisher
NVIDIA
Task
Robotics
Modality
Control
Library
Not stated by the source
Parameters
3.3B parameters
Languages
Not stated by the source
Revision
d0814e7ecb19202e7c8468b46098b0b7ef3a6d61
First published
2025-12-01
Last updated
2025-12-15

Files and Weights

13 files, 6.6 GB in total. The weights are 2 files totalling 6.6 GB in safetensors.

Weights2 files · 6.6 GB
Configuration5 files · 396.0 KB
Documentation5 files · 16.0 KB
Repository1 file · 1.5 KB
Every file
FileTypeSizeSHA-256
model-00001-of-00002.safetensorsWeights5.0 GB 9710d31d331b
model-00002-of-00002.safetensorsWeights1.6 GB eb79bbd78930
config.jsonConfiguration1.8 KB —
embodiment_id.jsonConfiguration148 B —
model.safetensors.index.jsonConfiguration121.8 KB —
processor_config.jsonConfiguration9.3 KB —
statistics.jsonConfiguration262.8 KB —
EXPLAINABILITY.mdDocumentation2.5 KB —
LICENSEDocumentation4.1 KB —
PRIVACY.mdDocumentation551 B —
README.mdDocumentation7.8 KB —
SAFETY_and_SECURITY.mdDocumentation1.1 KB —
.gitattributesRepository1.5 KB —

License and Download

License
Not stated by the source
Access
Open weights, no gate
Download size
6.6 GB
Download from NVIDIA

Released by NVIDIA through its official repository on Hugging Face.

Built From

Memory Requirements

PrecisionWeights in memory
As published6.6 GB
16-bit6.6 GB
8-bit3.3 GB
4-bit1.6 GB

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

Questions About GR00T-N1.6-3B

How much GPU memory does GR00T-N1.6-3B need?

About 7.9 GB at 16-bit and 2 GB at 4-bit: the weights (3.3B parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run GR00T-N1.6-3B 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.

Similar Models

This repository contains a checkpoint of the Pi0 model (HF implementation | Paper) finetuned on the BridgeV2 dataset for robotic manipulation tasks. The model is later used for testing on the Simpler Environment and our INTACT Probing Suite for the generalization boundaries of VLA models. Paper: From Intention to Execution: Probing the Generalization Boundaries of Vision-Language-Action Models Or directly in python with Lerobot, see blow: First, install lerobot Then For more details please refer to our paper and code Checkpoint choice After training 15 epochs, we sweep the checkpoint at epoch 1, 2, 3, 4, 5, 10, 15 for performance on the original 4 Bridge tasks in the SimplerEnv, and choose…

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This repository contains the model-only checkpoint saved at 30,000 training steps. The files at the repository root are the original contents of checkpoint-30000. Full model and processor settings are in config.json, processorconfig.json, and experimentcfg/. The training run did not include an evaluation. Source checkpoint: outputs/moeforcetransformertuningobs2h1020260926223332/whiteboardv9k8s1e6f384xformer/whiteboardv9/moe/checkpoint-30000.

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This repository contains the model-only checkpoint saved at 30,000 training steps. The files at the repository root are the original contents of checkpoint-30000. Full model and processor settings are in config.json, processorconfig.json, and experimentcfg/. The training run did not include an evaluation. Source checkpoint: outputs/moeforcetransformertuningobs2h1020260926223332/usbk6s1e4f384xformer/usb/moe/checkpoint-30000.

Open weights 3.2B parameters