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Open-weight model · Robotics

act_piper_datatest_v3_100k_finetune_v1

by JoSeongJin seongjin0813/act_piper_datatest_v3_100k_finetune_v1

act_piper_datatest_v3_100k_finetune_v1 is an open-weight model for robotics from JoSeongJin, released under Apache License 2.0. It has 52M parameters. At 16-bit it needs about 0.1 GB of GPU memory, which fits on 1x MI300X from $1.85 an hour, at the lowest prices in the SAVRN Index.

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—
Weights206.7 MB
Licenseapache-2.0
AccessOpen weights
Monthly Downloads—

Runs On

What it takes to serve act_piper_datatest_v3_100k_finetune_v1 (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 Oct 18, 2026.

act_piper_datatest_v3_100k_finetune_v1 on every accelerator the SAVRN Index prices, at every precision

Model Card

By JoSeongJin, published under apache-2.0, revision a1153a100970.

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 JoSeongJin'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: piper_follower
  • Cameras: front

Inputs & Outputs

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

Inputs

Feature Type Shape
observation.state STATE (7,)
observation.images.front VISUAL (3, 240, 424)

Outputs

Feature Type Shape
action ACTION (7,)

Training Dataset

Training Configuration

Setting Value
Training steps 10000
Batch size 8
Optimizer adamw
Learning rate 1e-05
Seed 1000
LeRobot version 0.6.2

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=piper_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=seongjin0813/act_piper_datatest_v3_100k_finetune_v1 \
  --task="" \
  --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
seongjin0813/act_piper_datatest_v3_100k_finetune_v1
Publisher
JoSeongJin
Task
Robotics
Modality
Control
Library
lerobot
Parameters
52M parameters
Languages
act
Revision
a1153a100970666c4748b0915a4c1d2a2488de9d
First published
2026-10-09
Last updated
2026-10-09

Files and Weights

9 files, 206.7 MB in total. The weights are 3 files totalling 206.7 MB in safetensors.

Weights3 files · 206.7 MB
Configuration4 files · 11.1 KB
Documentation1 file · 5.6 KB
Repository1 file · 1.5 KB
Every file
FileTypeSizeSHA-256
model.safetensorsWeights206.7 MB 4fcb45c6f2e2
policy_postprocessor_step_0_unnormalizer_processor.safetensorsWeights6.6 KB f4285573b3d3
policy_preprocessor_step_3_normalizer_processor.safetensorsWeights6.6 KB fd0a3dbb2afd
config.jsonConfiguration1.6 KB —
policy_postprocessor.jsonConfiguration660 B —
policy_preprocessor.jsonConfiguration1.2 KB —
train_config.jsonConfiguration7.6 KB —
README.mdDocumentation5.6 KB —
.gitattributesRepository1.5 KB —

License and Download

License
apache-2.0
Access
Open weights, no gate
Download size
206.7 MB
Download from JoSeongJin

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

Built From

  • Described by arXiv:2304.13705
  • Trained on (disclosed) seongjin0813/my_piper_datatest_v3_100k_finetune_v1

Memory Requirements

PrecisionWeights in memory
As published206.7 MB
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 act_piper_datatest_v3_100k_finetune_v1

How much GPU memory does act_piper_datatest_v3_100k_finetune_v1 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 act_piper_datatest_v3_100k_finetune_v1 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 act_piper_datatest_v3_100k_finetune_v1 commercially?

Yes. act_piper_datatest_v3_100k_finetune_v1 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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