HOPEJr
Research Development

HOPEJr

HOPEJr is an open-source DIY humanoid robot project from the Hugging Face LeRobot ecosystem and The Robot Studio. The May 2025 unveiling positioned it as a roughly $3,000 full-size humanoid intended to lower the cost of robot-learning hardware, while current official materials show an active developer platform rather than a consumer-ready home assistant. The official HOPEJr repository includes full-body design and URDF assets plus an actively updated arm and dexterous-hand stack, and Hugging Face's LeRobot documentation covers arm/hand calibration, teleoperation, recording, replay, and training workflows. Treat it as experimental research hardware for builders who can assemble, calibrate, and debug an open-source robot.

Listed price

$3,000

Hugging Face's May 2025 launch post and TechCrunch launch coverage gave an approximately $3,000 target estimate, not a finalized retail list price. Public normal-order shipping status and final kit/BOM cost remain not clearly published.

Release window

May 29, 2025

Current status

Development

Hugging Face LeRobot

Last verified

Jul 17, 2026

Share this robot

Open a plain share composer on X or Bluesky for this robot profile.

Technical overview

Core specifications and system stack

A fast read on the mechanical profile, sensing package, and platform integrations behind HOPEJr.

Technical Specifications

Height

Not officially disclosed

Weight

Not officially disclosed

Dimensions

Full humanoid project with arms, torso, legs, and dexterous hands; official height, footprint, and weight are not disclosed

Battery Life

Not officially disclosed

Charging Time

Not officially disclosed

Max Speed

Not officially disclosed

Degrees of Freedom

Up to 66 actuated degrees of freedom reported in launch coverage; current official documentation does not publish a finalized whole-body production specification

Payload

Not officially disclosed

Operational profile

How this robot is configured

Capabilities

8

Connectivity

2

Key capabilities

Open-source DIY humanoid research platformFull humanoid body design assets with arms, torso, legs, and URDF modelsDexterous hand development with underactuated fingers and an opposable thumbArm and hand calibration through Hugging Face LeRobot toolsGlove and exoskeleton teleoperation workflowsDataset recording, replay, training, and policy evaluation examples3D-printable hardware files and STEP models for builder iterationSimplified arm and exoskeleton assembly using custom PCBs

Ecosystem fit

Hugging Face LeRobotTheRobotStudio HOPEJr GitHub assetsProject Homunculus teleoperation conceptsURDF simulation modelsSTL and STEP 3D-printing workflowPython LeRobot command-line tools

About the HOPEJr

3Sensors2Protocols8Capabilities$3kListed Price

The HOPEJr is a Research robot built by Hugging Face LeRobot. HOPEJr is an open-source DIY humanoid robot project from the Hugging Face LeRobot ecosystem and The Robot Studio. The May 2025 unveiling positioned it as a roughly $3,000 full-size humanoid intended to lower the cost of robot-learning hardware, while current official materials show an active developer platform rather than a consumer-ready home assistant. The official HOPEJr repository includes full-body design and URDF assets plus an actively updated arm and dexterous-hand stack, and Hugging Face's LeRobot documentation covers arm/hand calibration, teleoperation, recording, replay, and training workflows. Treat it as experimental research hardware for builders who can assemble, calibrate, and debug an open-source robot.

At a listed price of $3,000, it positions itself in the mid-range segment of the research market. See all Hugging Face LeRobot robots on the Hugging Face LeRobot page.

Spec Breakdown

Detailed specifications for the HOPEJr

Dimensions

Full humanoid project with arms, torso, legs, and dexterous hands; official height, footprint, and weight are not disclosed

The overall dimensions of Full humanoid project with arms, torso, legs, and dexterous hands; official height, footprint, and weight are not disclosed define the robot's physical footprint and determine what spaces it can navigate and what clearances it requires for operation.

Degrees of Freedom

Up to 66 actuated degrees of freedom reported in launch coverage; current official documentation does not publish a finalized whole-body production specification

With Up to 66 actuated degrees of freedom reported in launch coverage; current official documentation does not publish a finalized whole-body production specification, the HOPEJr has a motion envelope shaped by its joint layout and whole-body control system.

Payload Capacity

Not officially disclosed

A payload capacity of Not officially disclosed determines what the robot can carry or manipulate. This is a critical spec for practical applications where the robot needs to handle physical objects.

The HOPEJr uses LeRobot integration for calibration, teleoperation, dataset recording, replay, policy training, and evaluation; final onboard AI/compute stack not officially disclosed as its intelligence backbone. This AI platform powers the robot's decision-making, perception processing, and autonomous behavior. The sophistication of the AI stack directly impacts how well the robot handles unexpected situations and adapts to new environments.

HOPEJr Sensor Suite

The HOPEJr integrates 3 sensor types, forming the perceptual foundation that enables autonomous operation.

This sensor configuration enables the HOPEJr to perceive its environment and operate autonomously in its intended use cases. Multiple sensor modalities provide redundancy and more robust perception than any single sensor type alone.

Explore sensor technologies: components glossary · full components directory

HOPEJr Use Cases & Applications

Research robots serve as platforms for advancing robotics science and engineering. They enable researchers to test theories about locomotion, manipulation, perception, and human-robot interaction in controlled and real-world environments.

Capabilities That Enable Real-World Use

The HOPEJr offers 8 distinct capabilities, each contributing to the robot's practical utility.

Open-source DIY humanoid research platform
Full humanoid body design assets with arms, torso, legs, and URDF models
Dexterous hand development with underactuated fingers and an opposable thumb
Arm and hand calibration through Hugging Face LeRobot tools
Glove and exoskeleton teleoperation workflows
Dataset recording, replay, training, and policy evaluation examples
3D-printable hardware files and STEP models for builder iteration
Simplified arm and exoskeleton assembly using custom PCBs

These capabilities work together with the robot's 3 onboard sensor types and LeRobot integration for calibration, teleoperation, dataset recording, replay, policy training, and evaluation; final onboard AI/compute stack not officially disclosed AI platform to deliver practical, real-world performance.

Ecosystem Integration

The HOPEJr integrates with the following platforms and ecosystems, extending its utility beyond standalone operation.

Hugging Face LeRobot TheRobotStudio HOPEJr GitHub assets Project Homunculus teleoperation concepts URDF simulation models STL and STEP 3D-printing workflow Python LeRobot command-line tools

This ecosystem compatibility enables the HOPEJr to work as part of a broader automation setup rather than operating in isolation.

HOPEJr Capabilities

8

Capabilities

3

Sensor Types

AI

LeRobot integration for…

Open-source DIY humanoid research platform
Full humanoid body design assets with arms, torso, legs, and URDF models
Dexterous hand development with underactuated fingers and an opposable thumb
Arm and hand calibration through Hugging Face LeRobot tools
Glove and exoskeleton teleoperation workflows
Dataset recording, replay, training, and policy evaluation examples
3D-printable hardware files and STEP models for builder iteration
Simplified arm and exoskeleton assembly using custom PCBs

Connectivity & Integration

How the HOPEJr communicates with your network, smart home devices, cloud services, and companion apps.

Network & Communication Protocols

Network protocols for device communication — enabling the HOPEJr to participate in various networking scenarios.

HOPEJr Technology Stack Overview

The HOPEJr by Hugging Face LeRobot integrates 6 distinct technology components across sensing, connectivity, intelligence, and interaction layers.

Perception — 3 Sensor Types

The perception layer is built on Joint and motor-state feedback used during calibration and teleoperation, Optional camera input in LeRobot recording examples, Final whole-body onboard sensor suite not officially disclosed. These work in concert to give the robot a detailed understanding of its operating environment. This multi-sensor approach provides redundancy and enables the robot to function reliably even when individual sensors encounter challenging conditions such as low light, reflective surfaces, or cluttered spaces.

Connectivity — 2 Protocols

For communications, the HOPEJr relies on USB serial control paths shown in LeRobot arm and hand examples, Host-computer LeRobot workflow. This connectivity stack ensures the robot can communicate with cloud services, local smart home devices, mobile apps, and other networked systems in its environment.

Intelligence — LeRobot integration for calibration, teleoperation, dataset recording, replay, policy training, and evaluation; final onboard AI/compute stack not officially disclosed

LeRobot integration for calibration, teleoperation, dataset recording, replay, policy training, and evaluation; final onboard AI/compute stack not officially disclosed serves as the computational brain, processing sensor data, making navigation decisions, and orchestrating the robot's autonomous behaviors. The quality of this AI platform directly influences how well the robot handles novel situations, adapts to changes in its environment, and improves its performance over time through learning.

Who Should Consider the HOPEJr?

Target Audience

Research robots are acquired by universities, government labs, and corporate R&D departments. They serve as experimental platforms for developing new algorithms, testing locomotion strategies, and advancing the field of robotics. Some are also used for educational purposes.

Key Considerations

Open-source software compatibility (ROS/ROS 2), sensor modularity, programmability, available SDK/API quality, community support, and published research papers using the platform are key factors. Documentation quality and the ability to modify both hardware and software are essential for research use.

Price Context

At $3k (Hugging Face's May 2025 launch post and TechCrunch launch coverage gave an approximately $3,000 target estimate, not a finalized retail list price. Public normal-order shipping status and final kit/BOM cost remain not clearly published.), the HOPEJr sits in the premium price tier for research robots. At this price point, buyers can expect solid build quality, advanced features, and regular software updates.

Availability

Development

The HOPEJr is currently in active development. Follow Hugging Face LeRobot for updates on when the robot will become available for purchase or pre-order.

HOPEJr: Strengths & Trade-offs

Engineering compromises and where this research robot excels

What the HOPEJr does well

Broad capability set

With 8 distinct capabilities, the HOPEJr is designed as a versatile platform rather than a single-task device. This breadth means the robot can handle varied scenarios and workflows, reducing the need for multiple specialized robots and increasing its utility across different situations.

What to consider carefully

Currently in development

The HOPEJr is not yet available as a finished, shipping product. Specifications may change before commercial release, and timelines for availability are subject to revision. Early adopters should account for this uncertainty in their planning.

Note: This strengths and trade-offs assessment is based on the HOPEJr's documented specifications as tracked in the ui44 database. Real-world performance depends on deployment conditions, firmware maturity, and environmental factors. For the most current information, check the Hugging Face LeRobot manufacturer page or visit the official product page. Use the comparison tool to evaluate these trade-offs against competing robots in the same category.

How Research Robot Technology Works

Understanding the engineering behind this category

Research robots serve a fundamentally different purpose than commercial or consumer models. They are platforms for discovery — enabling scientists and engineers to test theories, develop algorithms, and push the boundaries of what robots can do. The technology in research robots prioritizes openness, flexibility, and access to raw data over consumer-friendly packaging or commercial reliability. Understanding this distinction is important for anyone considering a research robot platform.

Navigation & Mobility

Research robots typically expose their navigation systems at a much lower level than commercial products. Researchers can access raw sensor data, modify SLAM algorithms, implement custom path planners, and test novel navigation approaches. ROS (Robot Operating System) and ROS 2 compatibility is standard, providing a common framework for sharing navigation modules across the research community. This openness enables rapid iteration — a researcher can swap between different SLAM implementations, test new obstacle avoidance strategies, or develop entirely novel navigation paradigms without being locked into a vendor's proprietary stack.

The Role of AI

Research robots serve as physical testbeds for AI algorithms that may eventually appear in commercial products years later. Reinforcement learning, imitation learning, few-shot task learning, and human-robot interaction studies all require robot platforms that can execute AI-generated commands in the physical world. The gap between simulation (where training is cheap and fast) and reality (where physics is unforgiving) makes physical robot platforms essential for validating AI approaches. Research robots must support rapid deployment of new AI models without extensive integration work.

Sensor Fusion & Perception

Research platforms prioritize sensor modularity and data access. Standard mounting interfaces allow researchers to attach custom sensors alongside built-in ones. Raw sensor data streams (not just processed results) are accessible for developing novel perception algorithms. Precise time-stamping and synchronization across sensor streams enable accurate multi-modal fusion research. Many research robots include more sensors than strictly necessary for any single application, providing researchers with rich datasets for developing and testing new algorithms.

Power & Battery Management

Research robots balance operational runtime with practical lab use. Sessions of one to four hours are typical, with quick charging between experiments. Some research setups use tethered power for long-running experiments where battery limitations would interrupt data collection. Power monitoring and logging capabilities help researchers understand the energy costs of different behaviors and algorithms — important for developing efficient approaches that will eventually run on battery-constrained commercial systems.

Safety by Design

Research environments present unique safety challenges because robots are constantly being programmed with untested behaviors. Hardware safety limits (joint speed caps, force limits, emergency stops) must be robust regardless of software commands. Safety-rated monitored stop and speed monitoring ensure the robot cannot exceed safe operating parameters even when running experimental code. Collaborative operation standards apply when researchers work alongside the robot during experiments. Many labs implement layered safety with physical barriers for high-speed testing and open-area operation restricted to validated, lower-risk behaviors.

What's Next for Research Robots

Research robot platforms are becoming more accessible and capable. Cloud robotics enables remote experiment execution and shared datasets. Digital twins and high-fidelity simulators reduce the need for physical hardware time while improving sim-to-real transfer. Standardized benchmarks and open datasets enable fair comparison of results across labs. The democratization of robotics research — through lower-cost platforms, open-source software, and cloud infrastructure — is expanding who can contribute to advancing the field.

The HOPEJr by Hugging Face LeRobot incorporates many of these technology pillars. For a detailed look at the specific sensors and components used in the HOPEJr, see the sensor analysis and connectivity sections above, or browse the complete components glossary for explanations of every technology used across the robotics industry.

HOPEJr in the Research Market

How this robot compares in the research landscape

At $3,000, the HOPEJr is positioned in the premium tier for research robots. At this price point, buyers expect top-tier build quality, advanced features, and strong after-sales support.

The HOPEJr's 3 sensor types provide solid perceptual coverage for its intended use cases. This mid-range sensor suite balances cost with capability, covering the essential modalities needed for research applications.

As a robot still in development, the HOPEJr represents Hugging Face LeRobot's vision for where research robotics is heading. Specifications may evolve before commercial release, and early performance demonstrations should be evaluated with this context in mind.

Head-to-Head Comparisons

Side-by-side specs, capability overlap analysis, and key differentiators.

For the full picture of Hugging Face LeRobot's portfolio and market strategy, visit the Hugging Face LeRobot manufacturer page.

Deployment Readiness and Procurement Signals for HOPEJr

What the public profile tells you, and what still needs direct vendor confirmation

From a buying and rollout perspective, the HOPEJr should be read as a research platform aimed at labs and development teams validating robotics workflows. ui44 currently tracks 8 capability signals, 3 sensor inputs, and a last verification date of 2026-07-17. That mix gives buyers a useful first-pass picture, but it is still only the public layer of due diligence, especially when procurement, uptime, and support commitments are decided directly with Hugging Face LeRobot.

Commercial model

$3,000 list price

A published price gives buyers a starting point for budgeting, ROI modeling, and peer comparison before deeper vendor conversations begin.

Integration posture

2 connectivity options

The profile lists USB serial control paths shown in LeRobot arm and hand examples, Host-computer LeRobot workflow, plus LeRobot integration for calibration, teleoperation, dataset recording, replay, policy training, and evaluation; final onboard AI/compute stack not officially disclosed as the AI stack. That is enough to infer the basic network posture, but buyers should still confirm APIs, fleet management, and workflow integration details. ui44 currently tracks 6 declared compatibility links.

Spec disclosure

0/7 core specs public

ui44 currently has 0 of 7 core physical and operating specs filled in for this model, leaving 7 gaps that matter for deployment planning. Missing runtime, charge, speed, or payload details can materially change staffing and site-readiness assumptions.

The current profile is useful for scouting, but it still leaves meaningful operational unknowns. If this robot is heading toward a pilot or purchase discussion, the next step should be a structured vendor Q&A that fills the remaining runtime, charging, payload, safety, or integration blanks before anyone builds ROI assumptions around it.

If you want a faster apples-to-apples read, compare the HOPEJr against nearby alternatives in ui44's compare view, then cross-check the underlying AI, sensor, and subsystem terms in the components glossary. For manufacturer-level context, the Hugging Face LeRobot profile helps anchor this robot inside the wider product lineup.

Before you sign off on a pilot, confirm these points

  • Ask for real shift runtime under the intended workload, not just standby endurance.
  • Confirm how the charging workflow works in practice, including charger count, swap options, and expected downtime.
  • Verify travel speed and cycle time if the robot must keep up with people, lines, or service windows.
  • Clarify usable payload or tool-load limits before planning material handling or mounted accessories.

Owning the HOPEJr: Setup, Maintenance & Tips

Practical guide from day one through years of ownership

Initial Setup

Research robot setup combines hardware assembly with software environment configuration. Unpack and assemble the platform following the manufacturer's documentation. Install the development framework — typically ROS or ROS 2 — and verify sensor connectivity. Calibrate all sensors using the manufacturer's tools and procedures. Set up the simulation environment (Gazebo, Isaac Sim, or equivalent) alongside the physical platform for parallel development. Establish version control for your experiment code and configuration. Document the initial calibration values and system state as your baseline for future reference. Plan network and computing infrastructure to handle the data rates your sensors will generate.

Ongoing Maintenance

Research robots need maintenance that preserves the precision required for valid experimental results. Regularly verify sensor calibration — drift in camera intrinsics or IMU biases can invalidate experiment data. Maintain clean workspace conditions to protect optical sensors. Document any hardware modifications or maintenance performed, as these can affect experimental reproducibility. Update software dependencies carefully, documenting versions used for each experiment. Joint and actuator wear in research robots that perform repetitive tasks should be monitored and factored into experimental design.

Software Updates & Long-Term Support

Research robot software updates require careful management to maintain experiment reproducibility. Document the exact software versions used for each experiment. Test updates in a separate environment before applying to your experiment platform. Contribute bug fixes and improvements back to the community when using open-source frameworks. Be aware that ROS and other framework updates may require code changes in your custom packages — budget time for integration testing after major framework updates.

Maximizing Longevity

Research robots often have longer productive lives than commercial products because they can be upgraded and repurposed. Extend your investment by maintaining clean mechanical and electrical systems, documenting all modifications for future lab members, and keeping spare parts for common wear items. When specific components become obsolete, community forums and lab networks can be valuable sources for replacements. Consider the platform's modularity when planning future research directions — a platform that can accept new sensors and actuators adapts to evolving research questions.

For Hugging Face LeRobot-specific support resources and documentation, visit the Hugging Face LeRobot page on ui44 or check the manufacturer's official website at Hugging Face LeRobot's product page.

Frequently Asked Questions

What is the HOPEJr?
The HOPEJr is a Research robot made by Hugging Face LeRobot. HOPEJr is an open-source DIY humanoid robot project from the Hugging Face LeRobot ecosystem and The Robot Studio. The May 2025 unveiling positioned it as a roughly $3,000 full-size humanoid intended to lower the cost of robot-learning hardware, while current official materials show an active developer platform rather than a consumer-ready home assistant. The official HOPEJr repository includes full-body design and URDF assets plus an actively updated arm and dexterous-hand stack, and Hugging Face's LeRobot documentation covers arm/hand calibration, teleoperation, recording, replay, and training workflows. Treat it as experimental research hardware for builders who can assemble, calibrate, and debug an open-source robot. It features 3 sensor types, 2 connectivity protocols, and 8 distinct capabilities.
How much does the HOPEJr cost?
The HOPEJr is listed at $3,000 (Hugging Face's May 2025 launch post and TechCrunch launch coverage gave an approximately $3,000 target estimate, not a finalized retail list price. Public normal-order shipping status and final kit/BOM cost remain not clearly published.). This places it in the mid-range tier for research robots. Prices may vary by region and retailer.
Is the HOPEJr available to buy?
The HOPEJr is currently in active development and is not yet available for purchase. Follow Hugging Face LeRobot for release date announcements.
What sensors does the HOPEJr have?
The HOPEJr is equipped with 3 sensor types: Joint and motor-state feedback used during calibration and teleoperation, Optional camera input in LeRobot recording examples, Final whole-body onboard sensor suite not officially disclosed. These sensors work together through sensor fusion to provide comprehensive environmental awareness for autonomous operation. See the sensor analysis section for details.
What AI does the HOPEJr use?
The HOPEJr is powered by LeRobot integration for calibration, teleoperation, dataset recording, replay, policy training, and evaluation; final onboard AI/compute stack not officially disclosed. This AI platform handles the robot's perception processing, decision-making, and autonomous behavior. The sophistication of the AI directly impacts how well the robot handles unexpected situations, learns from its environment, and improves over time.
How does the HOPEJr compare to the LeRobot Humanoid?
The HOPEJr and LeRobot Humanoid are both research robots, but they differ in key specifications, pricing, and manufacturer approach. Use the side-by-side comparison tool to see detailed differences in specs, sensors, and capabilities. You can also browse other similar robots below.
Does the HOPEJr work with smart home systems?
Yes, the HOPEJr is compatible with: Hugging Face LeRobot, TheRobotStudio HOPEJr GitHub assets, Project Homunculus teleoperation concepts, URDF simulation models, STL and STEP 3D-printing workflow, Python LeRobot command-line tools. This ecosystem integration allows the robot to work alongside your existing smart home devices and platforms rather than operating as an isolated system.
How current is the HOPEJr data on ui44?
The HOPEJr specifications on ui44 were last verified on 2026-07-17. All data is sourced from official Hugging Face LeRobot documentation, spec sheets, and press releases. If you notice any outdated information, please let us know.

Data Integrity

All HOPEJr data on ui44 is verified against official Hugging Face LeRobot sources, including spec sheets, product pages, and press releases. Last verified: 2026-07-17. Official source: Hugging Face LeRobot product page. If you find outdated or incorrect information, please let us know — accuracy is our top priority.

Explore More on ui44

Explore more research robots

See how the HOPEJr stacks up — compare specs, browse the research category, or search the full database.