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

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Technical overview

Core specifications and system stack

A fast read on the mechanical profile, sensing package, and listed platform details for 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

Listed platforms & ecosystem

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

About the HOPEJr

2Protocols8CapabilitiesUSD $3,000Listed 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.

The HOPEJr is listed at USD $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. 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 are a recorded size entry. Check which axes and configuration it covers: a height-only entry does not establish width, depth or passage fit. Planning clearance also requires the operating envelope, turning space, attachments and documented margins.

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 recorded degree-of-freedom entry. Check whether it counts joints, independently controlled axes, fingers or the entire platform. The count alone does not establish reach, dexterity, workspace or controller architecture.

Read this recorded AI entry alongside the model description and source notes for announcement or deployment context. A platform name alone does not establish implemented features, autonomy, or performance.

HOPEJr Sensor Suite

The profile lists the sensor descriptions below. These entries do not establish physical sensor counts, sensor fusion, redundancy, or performance. Other sensor information is missing or unspecified in the source list.

Consult the linked profile sources for hardware configuration and tested behavior. A technology label alone does not verify an operating capability.

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.

Recorded Capabilities

The HOPEJr record lists 8 capabilities. Keep any announcement or demonstration qualifiers attached to these entries; the count alone does not establish practical performance.

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 are the capabilities listed in the profile. Hardware configuration and demonstrated performance should be checked against the linked sources.

Listed Platforms & Ecosystem

These are the platforms, communities, or ecosystem relationships listed in the profile. A listed name or protocol alone does not confirm home-device interoperability or automation support.

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

HOPEJr Capabilities

8

Capabilities

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

Listed Connectivity & Voice Systems

The HOPEJr profile lists the following communication and voice-system descriptions.

Network & Communication Details

Listed network interfaces do not by themselves identify supported services, integrations, or device-control functions.

HOPEJr Technology Stack Overview

The HOPEJr by Hugging Face LeRobot has the following technology descriptions in its profile.

Reported sensing

The profile lists Joint and motor-state feedback used during calibration and teleoperation, Optional camera input in LeRobot recording examples. Hardware quantities, integration, and tested behavior require separate source evidence.

Listed connectivity

The connectivity descriptions listed for the HOPEJr are USB serial control paths shown in LeRobot arm and hand examples, Host-computer LeRobot workflow. Specific services and device interoperability require separate documentation.

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.

Listed pricing

The HOPEJr is listed at USD $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.

Availability

Development

The HOPEJr is listed as Development, indicating active development in the catalog. Specifications and release plans may change. Check Hugging Face LeRobot's current documentation for access options and release updates.

HOPEJr: Strengths & Trade-offs

Recorded features and considerations to assess

Recorded features to assess for the HOPEJr

Recorded capability range

The HOPEJr record lists 8 capabilities. Review their qualifiers and supporting evidence for the tasks you need. The number of entries does not establish workflow coverage, reliability, or the ability to replace other robots.

What to consider carefully

Listed Development

The HOPEJr is listed as Development, indicating active development in the catalog. Specifications and release plans may change. Check Hugging Face LeRobot's current documentation for access options and release updates.

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 source. 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.

These are category-level technology examples; they do not establish the capabilities of the HOPEJr. For its recorded hardware details, see the sensor analysis and connectivity sections above. Check model-specific documentation from Hugging Face LeRobot for supported behavior, or use the components glossary to look up terminology.

HOPEJr in the Research Market

How this robot compares in the research landscape

The HOPEJr is listed at USD $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.

The HOPEJr is listed as Development, indicating active development in the catalog. Specifications and release plans may change. Check Hugging Face LeRobot's current documentation for access options and release updates.

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 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

USD $3,000 list price

The HOPEJr is listed at USD $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.

Integration posture

2 connectivity options

The profile lists USB serial control paths shown in LeRobot arm and hand examples, Host-computer LeRobot workflow. These labels do not establish APIs, fleet-management features, or workflow integration. These are the platforms, communities, or ecosystem relationships listed in the profile. A listed name or protocol alone does not confirm home-device interoperability or automation support.

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.

Find product and source links on the Hugging Face LeRobot page on ui44 or open Hugging Face LeRobot's official source. Use model-specific manufacturer documentation for setup, cleaning, and service instructions.

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.
How much does the HOPEJr cost?
The HOPEJr is listed at USD $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.
Is the HOPEJr available to buy?
The HOPEJr is listed as Development, indicating active development in the catalog. Specifications and release plans may change. Check Hugging Face LeRobot's current documentation for access options and release updates. Follow Hugging Face LeRobot for updates.
What sensors are reported for the HOPEJr?
The profile lists the sensor descriptions below. These entries do not establish physical sensor counts, sensor fusion, redundancy, or performance. Other sensor information is missing or unspecified in the source list. Joint and motor-state feedback used during calibration and teleoperation, Optional camera input in LeRobot recording examples See the sensor information section for details.
What AI does the HOPEJr use?
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.
What platforms or ecosystem relationships are listed for the HOPEJr?
These are the platforms, communities, or ecosystem relationships listed in the profile. A listed name or protocol alone does not confirm home-device interoperability or automation support. 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
How current is the HOPEJr data on ui44?
The HOPEJr record has a last-checked date of 2026-07-17. Consult the model description, source links, and attribution notes for the basis of individual claims. This date does not mean every claim is manufacturer-confirmed or independently tested. If you notice outdated information, please let us know.

Data Integrity

The HOPEJr record brings together the listed specifications and attributed claims. Consult the model description and source notes to distinguish manufacturer announcements, reported information, and unknowns. A source link or review date does not establish independent testing or manufacturer confirmation of every claim. Record last checked: 2026-07-17. Official source: Hugging Face LeRobot official source. If you find outdated or incorrect information, please let us know — accuracy is our top priority.

Explore More on ui44

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