small hobby humanoid
Train ROBOTIS OP3 with reinforcement learning
The 50 cm Dynamixel-powered humanoid used in RoboCup kid-size and university labs, from MuJoCo Menagerie.
- Actuators
- 20
- First skill
- ~5M steps
- Size
- ≈50 cm
- License
- Apache-2.0
Tricks people teach ROBOTIS OP3
How it works
- Describe the trick in a sentence and pick ROBOTIS OP3.
- alia, kualia's assistant, writes the Gymnasium task — reward, success, failure and world objects — and runs 13 automatic checks.
- Train with PPO on kualia's servers and watch every checkpoint replayed in 3D in your browser.
- Export a deterministic ONNX policy and run it on the robot with onnxruntime.
From your coding agent
Working in Claude Code, Cursor or Codex? Connect kualia as an MCP server with a personal API key (Settings → API keys), then ask: “Train my ROBOTIS OP3 to walk forward with kualia.”
claude mcp add --transport http kualia https://kualia.ai/api/mcp \ --header "Authorization: Bearer $KUALIA_API_KEY"Coding-agent guide →
Questions
Can I train ROBOTIS OP3 without writing code?
Yes. Pick ROBOTIS OP3 in kualia, describe the trick in a sentence, and kualia's assistant writes the Gymnasium task (reward, success, failure and any world objects), runs 13 automatic checks and trains a PPO policy in MuJoCo.
How many training steps does ROBOTIS OP3 need?
Roughly ~5M steps for a first real skill with PPO. Start with a 10,000-step first try to check the task before spending more.
Can I run the trained policy on the real ROBOTIS OP3?
kualia exports a deterministic ONNX policy with observation normalisation baked in, plus metadata describing observations and action scaling. You run it with onnxruntime on the robot's computer. Test carefully: simulation and hardware differ.
Can my coding agent use kualia for ROBOTIS OP3?
Yes. kualia is a remote MCP server at https://kualia.ai/api/mcp. Add it to Claude Code, Cursor or Codex with a personal API key and ask the agent to train ROBOTIS OP3.
More tiny & maker robots
ROBOTIS OP3 model by ROBOTIS, Apache-2.0; used unchanged except for a floor, a standing pose and actuator centring where noted. kualia is not affiliated with ROBOTIS.