How much does it cost to teach an SO-101 arm to pick and place with LeRobot?

About $230, per the SO-ARM100 README BOM, leader+follower pair.

Muted demo loop from the projectCredit: Hugging Face LeRobot docs

Teach an SO-101 arm to pick and place with LeRobot

Arm, Medium, $230

Record ~50 teleoperated demos with a leader/follower SO-101 pair, push the dataset to the Hugging Face Hub, and train an ACT policy that repeats the task on its own.

Cost $230: SO-ARM100 README BOM, leader+follower pair.

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LeRobot is Hugging Face's PyTorch library for real-world robotics: a hardware-agnostic robot interface, the LeRobotDataset format (Parquet + MP4) on the Hub, and ready-to-train policies like ACT, Diffusion Policy and SmolVLA. The classic first project: move the leader arm by hand, the follower copies it, record episodes of 'pick the cube, drop it in the bowl', train, then let the policy run.

Hardware & cost: Two SO-101 arms (leader + follower, 6 Feetech servos each), a USB camera or two, a laptop with a GPU (or cloud GPU for training). The SO-ARM100 README lists BOM totals of roughly $122 to $230 (US) depending on the configuration; Seeed and others sell kits.

Difficulty: Medium. Assembly and calibration take an afternoon; training is copy-paste commands.

Agent install prompt (paste into Claude Code, Cursor or Codex): "Clone https://github.com/huggingface/lerobot, create a Python 3.10+ venv, run `pip install -e .` (or `pip install lerobot`), then follow the LeRobot docs for my robot: find the motor bus port, calibrate, and run a teleop test. Stop and ask me before moving any motor."

Source: huggingface/lerobot on GitHub — https://github.com/huggingface/lerobot (facts checked against the project README, Oct 2026; prices vary by region).

Quick answers

How much does it cost to teach an SO-101 arm to pick and place with LeRobot?: About $230, per the SO-ARM100 README BOM, leader+follower pair.
What do you need to teach an SO-101 arm to pick and place with LeRobot?: Two SO-101 arms (leader + follower, 6 Feetech servos each), a USB camera or two, a laptop with a GPU (or cloud GPU for training). The SO-ARM100 README lists BOM totals of roughly $122 to $230 (US) depending on the configuration; Seeed and others sell kits.
How hard is it to teach an SO-101 arm to pick and place with LeRobot?: Medium. Assembly and calibration take an afternoon; training is copy-paste commands.

Buying the parts new, one SO-101 follower arm came to $131.69 at Oct 30 retail prices. See the SO-101 parts list and cost.

How your agent drives it

Copied from the huggingface/lerobot README

Shell
```
$ pip install lerobot
```

Shell

$ lerobot-record \
  --robot.type=<robot_name> \
  --teleop.type=<teleoperator_name> \
  --dataset.repo_id=${HF_USER}/my-dataset

Shell

$ lerobot-train \
  --policy.type=act \
  --dataset.repo_id=lerobot/aloha_mobile_cabinet

Any coding agent that can run a shell can run these. Read the README before you run anything on a robot that moves.

Parts list

Some buy links may earn Robot Use Cases a commission. You pay the same price. Prices are what the builder listed in their source, so check the store.

SO-101: leader + follower pair (for teleop and LeRobot training)

Builder's listed total $229.88

7× Feetech STS3215 servo 7.4V, 1/345 gear (C001) · $13.89 eachBuy at Alibaba
2× Feetech STS3215 servo 7.4V, 1/191 gear (C044) · $13.89 eachBuy at Alibaba
3× Feetech STS3215 servo 7.4V, 1/147 gear (C046) · $13.89 eachBuy at Alibaba
2× Waveshare serial bus servo driver board · $10.60 eachBuy at Amazon
USB-C cable, 2 pack · $7Buy at Amazon
2× 5V power supply (5.5x2.1mm) · $10 eachBuy at Amazon
Table clamp, 4 pack · $9Buy at Amazon
Precision screwdriver set · $6Buy at Amazon
Alternative: all 6 leader servos in one bundle (3x C046, 2x C044, 1x C001)Buy at Alibaba

Also needed: 3D-printed parts for both arms in PLA+ (or a printed kit below). The leader's six servos are also sold as one bundle.

Or buy a kit

Kits listed in the SO-ARM100 README. Prices change by option, so check the vendor page.

Seeed Studio SO-ARM kit (includes 3D-printed kits)Buy at Seeed Studio
WowRobo SO-ARM101 kit (assembled versions)Buy at WowRobo
PartaBot, US (assembled versions)Buy at PartaBot
ForgeMotion Labs on Amazon US (frame, electronics or complete kits)Buy at Amazon
Seeed kit on AliExpressBuy at AliExpress