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Open-weight model · Robotics

chess_single_white_rook_night_tpu_corner_all5_merged

by Jason Lee chair0/chess_single_white_rook_night_tpu_corner_all5_merged

Action Chunking with Transformers (ACT) is an imitation-learning method that predicts short action chunks instead of single steps. It learns from teleoperated data and often achieves high success rates.

Parameters52M
Context
Weights7.6 GB
Licenseapache-2.0
AccessOpen weights
Monthly Downloads

Runs On

What it takes to serve chess_single_white_rook_night_tpu_corner_all5_merged (52M 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 0.1 GB 0.1 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 0.1 GB 0.1 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 0.0 GB 0.0 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 Sep 18, 2026.

Model Card

By Jason Lee, published under apache-2.0, revision b95d4111f688.

Action Chunking with Transformers (ACT) is an imitation-learning method that predicts short action chunks instead of single steps. It learns from teleoperated data and often achieves high success rates. This policy has been trained and pushed to the Hub using LeRobot. Learn how to train and run it in the LeRobot act guide, or browse the full documentation. The policy consumes these observation features and produces these action features. Inputs Outputs New to LeRobot? These guides cover the full workflow: - Install LeRobot — set up the lerobot package. - Hardware setup — assemble, wire, and calibrate your robot and cameras. - Record data & train a policy — the end-to-end imitation-learning…

Read Jason Lee's full model card

Model Card for act

Action Chunking with Transformers (ACT) is an imitation-learning method that predicts short action chunks instead of single steps. It learns from teleoperated data and often achieves high success rates.

This policy has been trained and pushed to the Hub using LeRobot.

Learn how to train and run it in the LeRobot act guide, or browse the full documentation.


Model Details

  • License: apache-2.0
  • Robot type: so_follower
  • Cameras: wrist, side

Inputs & Outputs

The policy consumes these observation features and produces these action features.

Inputs

Feature Type Shape
observation.state STATE (6,)
observation.images.wrist VISUAL (3, 480, 640)
observation.images.side VISUAL (3, 480, 640)

Outputs

Feature Type Shape
action ACTION (6,)

Training Dataset

Training Configuration

Setting Value
Training steps 60000
Batch size 64
Optimizer adamw
Learning rate 1e-05
Seed 1000
LeRobot version 0.6.1

How to Get Started with the Model

New to LeRobot? These guides cover the full workflow:

The short version to run and train this policy:

Run the policy on your robot

lerobot-rollout \
  --strategy.type=base \
  --robot.type=so_follower \
  --robot.port=<your_robot_port> \
  --robot.cameras="{ <camera_1>: {type: opencv, index_or_path: <index_or_path>, width: 640, height: 480, fps: 30}, <camera_2>: {type: opencv, index_or_path: <index_or_path>, width: 640, height: 480, fps: 30}}" \
  --policy.path=chair0/chess_single_white_rook_night_tpu_corner_all5_merged \
  --task="Pick up the yellow print" \
  --duration=60

Replace the remaining <...> placeholders with your own values: --robot.port and the camera names/indices are specific to your machine, and the camera names must match the observation keys this policy was trained on.

When --strategy.type=base is used the script doesn't record the episodes. Skipping duration will make the policy run indefinitely. For more information look at rollout documentation.

Train your own policy

lerobot-train \
  --dataset.repo_id=${HF_USER}/<dataset> \
  --policy.type=act \
  --output_dir=outputs/train/<policy_repo_id> \
  --job_name=lerobot_training \
  --policy.device=cuda \
  --policy.repo_id=${HF_USER}/<policy_repo_id> \
  --wandb.enable=true

Writes checkpoints to outputs/train/<policy_repo_id>/checkpoints/.


Evaluation

No evaluation results have been provided for this policy yet.


Citation

If you use this policy, please cite the method linked in the description above, along with LeRobot:

@misc{cadene2024lerobot,
    author = {Cadene, Remi and Alibert, Simon and Soare, Alexander and Gallouedec, Quentin and Zouitine, Adil and Palma, Steven and Kooijmans, Pepijn and Aractingi, Michel and Shukor, Mustafa and Aubakirova, Dana and Russi, Martino and Capuano, Francesco and Pascal, Caroline and Choghari, Jade and Moss, Jess and Wolf, Thomas},
    title = {LeRobot: State-of-the-art Machine Learning for Real-World Robotics in Pytorch},
    howpublished = "\url{https://github.com/huggingface/lerobot}",
    year = {2024}
}

Identity and Version

Repository
chair0/chess_single_white_rook_night_tpu_corner_all5_merged
Publisher
Jason Lee
Task
Robotics
Modality
Control
Library
lerobot
Parameters
52M parameters
Languages
act
Revision
b95d4111f688b0bfeb1e9b8b70dae888e9b95400
First published
2026-09-17
Last updated
2026-09-18

Files and Weights

141 files, 7.6 GB in total. The weights are 63 files totalling 7.6 GB in safetensors.

Weights63 files · 7.6 GB
Configuration76 files · 169.4 KB
Documentation1 file · 5.8 KB
Repository1 file · 1.5 KB
Every file
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License and Download

License
apache-2.0
Access
Open weights, no gate
Download size
7.6 GB
Download from Jason Lee

Released by Jason Lee through its official repository on Hugging Face. Read the license.

Built From

  • Described by arXiv:2304.13705
  • Trained on (disclosed) chair0/chess_single_white_rook_night_tpu_corner_all5_merged

Memory Requirements

PrecisionWeights in memory
As published7.6 GB
16-bit0.1 GB
8-bit0.1 GB
4-bit0.0 GB

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

Questions About chess_single_white_rook_night_tpu_corner_all5_merged

How much GPU memory does chess_single_white_rook_night_tpu_corner_all5_merged need?

About 0.1 GB at 16-bit and 0 GB at 4-bit: the weights (52M parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run chess_single_white_rook_night_tpu_corner_all5_merged 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.

Can I use chess_single_white_rook_night_tpu_corner_all5_merged commercially?

Yes. chess_single_white_rook_night_tpu_corner_all5_merged is released under Apache License 2.0. The Apache License 2.0 is a permissive open-source license. It permits commercial use, modification and redistribution. It requires keeping the license and copyright notices and any NOTICE file, stating significant changes, and it includes an express patent grant from contributors.

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