Commercial model
$29,950 list price
A published price gives buyers a starting point for budgeting, ROI modeling, and peer comparison before deeper vendor conversations begin.
Robot dossier
Stretch 4
Release
May 12, 2026
Price
$29,950
Connectivity
0
Status
Available
Height
160cm
Weight
46kg (33kg with ballast removed for transport)
Battery
8 hours (light CPU load)
Payload
2.5kg arm extended; 4kg arm retracted
Home Assistants
Available
Stretch 4
Hello Robot's 2026 Stretch 4 is a wheeled mobile manipulator built for real homes, research labs, and workplace pilot deployments. It keeps the Stretch line's open ROS 2/Python developer model while adding a compact omnidirectional base, self-charging, longer 8-hour light-load runtime, a 160cm working height, and a stronger telescoping arm rated for 2.5kg extended or 4kg retracted payloads. Official materials position it as available now, with reference demos for mapping, navigation, 3D SLAM, data collection, and VLM grasping; IEEE Spectrum reports that Stretch 4 is also intended for in-home assistive pilots with people who have severe mobility impairments. It is still a high-cost developer/assistive platform rather than a mass-market consumer appliance.
Listed price
$29,950
$29,950 list price; available now for research/enterprise buyers and in-home assistive pilot deployments
Release window
May 12, 2026
Current status
Available
Hello Robot
Last verified
May 13, 2026
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Technical overview
Core specifications and system stack
A fast read on the mechanical profile, sensing package, and platform integrations behind Stretch 4.
Technical Specifications
Height
160cm
Weight
46kg (33kg with ballast removed for transport)
Dimensions
160cm height; 45cm diameter footprint
Battery Life
8 hours (light CPU load)
Charging Time
Not officially disclosed
Max Speed
Not officially disclosed
Payload
2.5kg arm extended; 4kg arm retracted
Operational profile
How this robot is configured
Capabilities
11
Connectivity
0
Key capabilities
Mobile ManipulationOmnidirectional Indoor MobilityAutonomous Mapping and Navigation3D SLAMSelf ChargingVLM Grasping DemosData Collection ToolsAssistive Teleoperation and Pilot Deployments
Ecosystem fit
ROS 2Python SDK
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Coverage
Related Articles
Reporting and explainers linked to Stretch 4.
About the Stretch 4
7Sensors11Capabilities$29.9kListed Price
The Stretch 4 is a Home Assistants robot built by Hello Robot. Hello Robot's 2026 Stretch 4 is a wheeled mobile manipulator built for real homes, research labs, and workplace pilot deployments. It keeps the Stretch line's open ROS 2/Python developer model while adding a compact omnidirectional base, self-charging, longer 8-hour light-load runtime, a 160cm working height, and a stronger telescoping arm rated for 2.5kg extended or 4kg retracted payloads. Official materials position it as available now, with reference demos for mapping, navigation, 3D SLAM, data collection, and VLM grasping; IEEE Spectrum reports that Stretch 4 is also intended for in-home assistive pilots with people who have severe mobility impairments. It is still a high-cost developer/assistive platform rather than a mass-market consumer appliance.
At a listed price of $29,950, it positions itself in the enterprise segment of the home assistants market. See all Hello Robot robots on the Hello Robot page.
Spec Breakdown
Detailed specifications for the Stretch 4
Height
160cmAt 160cm, the Stretch 4 is sized for its intended operating environment and use cases.
Weight
46kg (33kg with ballast removed for transport)Weighing 46kg (33kg with ballast removed for transport), the Stretch 4 balances structural integrity with portability and maneuverability.
Dimensions
160cm height; 45cm diameter footprintThe overall dimensions of 160cm height; 45cm diameter footprint define the robot's physical footprint and determine what spaces it can navigate and what clearances it requires for operation.
Battery Life
8 hours (light CPU load)With a battery life of 8 hours (light CPU load), the Stretch 4 can operate for sustained periods before requiring a recharge. Battery life is measured under typical operating conditions and may vary based on workload intensity and environmental factors.
Payload Capacity
2.5kg arm extended; 4kg arm retractedA payload capacity of 2.5kg arm extended; 4kg arm retracted 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 Stretch 4 uses Open-source ROS 2 and Python SDK with reference autonomy demos for mapping, navigation, 3D SLAM, data collection, and VLM grasping; IEEE Spectrum reports Intel NUC 15 plus NVIDIA Jetson Orin NX onboard compute. 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.
Stretch 4 Sensor Suite
The Stretch 4 integrates 7 sensor types, forming the perceptual foundation that enables autonomous operation.
Wide-FOV depth sensing
Details →
High-resolution RGB cameras
Details →
Calibrated RGB + depth perception
Details →
Floor hazard sensing
Details →
Pair of hemispherical LiDARs
Details →
Luxonis vision/navigation cameras
Details →
Wrist-mounted depth camera
Details →
This sensor configuration enables the Stretch 4 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
Stretch 4 Use Cases & Applications
Home assistant robots combine the functionality of a smart speaker, tablet, security camera, and telepresence device into a mobile platform that follows you or patrols your home. They represent the next evolution of smart home interaction.
Capabilities That Enable Real-World Use
The Stretch 4 offers 11 distinct capabilities, each contributing to the robot's practical utility.
Mobile Manipulation
Omnidirectional Indoor Mobility
Autonomous Mapping and Navigation
3D SLAM
Self Charging
VLM Grasping Demos
Data Collection Tools
Assistive Teleoperation and Pilot Deployments
55cm + 6cm Wrist Reach
Quick-Release Tooling
Open-Source Software Platform
These capabilities work together with the robot's 7 onboard sensor types and Open-source ROS 2 and Python SDK with reference autonomy demos for mapping, navigation, 3D SLAM, data collection, and VLM grasping; IEEE Spectrum reports Intel NUC 15 plus NVIDIA Jetson Orin NX onboard compute. AI platform to deliver practical, real-world performance.
Ecosystem Integration
The Stretch 4 integrates with the following platforms and ecosystems, extending its utility beyond standalone operation.
ROS 2
Python SDK
This ecosystem compatibility enables the Stretch 4 to work as part of a broader automation setup rather than operating in isolation.
Stretch 4 Capabilities
11
Capabilities
7
Sensor Types
AI
Open-source ROS 2 and Python…
Mobile Manipulation
Omnidirectional Indoor Mobility
Autonomous Mapping and Navigation
3D SLAM
Self Charging
VLM Grasping Demos
Data Collection Tools
Assistive Teleoperation and Pilot Deployments
55cm + 6cm Wrist Reach
Quick-Release Tooling
Open-Source Software Platform
Stretch 4 Technology Stack Overview
The Stretch 4 by Hello Robot integrates 8 distinct technology components across sensing, connectivity, intelligence, and interaction layers. The physical platform features a height of 160cm, a weight of 46kg (33kg with ballast removed for transport), providing the foundation on which this technology stack operates.
Perception — 7 Sensor Types
The perception layer is built on Wide-FOV depth sensing, High-resolution RGB cameras, Calibrated RGB + depth perception, Floor hazard sensing, Pair of hemispherical LiDARs, Luxonis vision/navigation cameras, Wrist-mounted depth camera. 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.
Intelligence — Open-source ROS 2 and Python SDK with reference autonomy demos for mapping, navigation, 3D SLAM, data collection, and VLM grasping; IEEE Spectrum reports Intel NUC 15 plus NVIDIA Jetson Orin NX onboard compute.
Open-source ROS 2 and Python SDK with reference autonomy demos for mapping, navigation, 3D SLAM, data collection, and VLM grasping; IEEE Spectrum reports Intel NUC 15 plus NVIDIA Jetson Orin NX onboard compute. 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 Stretch 4?
Target Audience
Home assistant robots target households looking for a mobile smart home hub that can move between rooms, provide video communication, monitor the home, and assist with daily tasks. Early adopters and smart home enthusiasts are the primary market.
Key Considerations
Mobility range, smart home platform integration, camera quality for video calls and monitoring, microphone/speaker quality for voice interaction, and the breadth of assistive capabilities are key. Consider privacy features (physical camera shutters, mute buttons) and whether the robot can navigate your home layout reliably.
Price Context
At $29.9k ($29,950 list price; available now for research/enterprise buyers and in-home assistive pilot deployments), the Stretch 4 sits in the professional price tier for home assistants robots. This price point typically includes professional support, integration services, and ongoing software updates.
Availability
AvailableThe Stretch 4 is currently available for purchase. Check the manufacturer's website or authorized retailers for the latest stock and ordering information.
Stretch 4: Strengths & Trade-offs
Engineering compromises and where this home assistants robot excels
What the Stretch 4 does well
Extensive sensor suite
With 7 sensor types onboard, the Stretch 4 has one of the more comprehensive perception systems in the home assistants category. This multi-modal approach enables robust environmental awareness, redundant obstacle detection, and reliable autonomous operation even in challenging conditions. More sensor diversity generally translates to better real-world adaptability.
Broad capability set
With 11 distinct capabilities, the Stretch 4 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.
Extended battery life
A battery life of 8 hours (light CPU load) provides substantial operational runway. For home assistants applications, this means longer work sessions between charges, fewer interruptions, and the ability to complete larger tasks or cover more area in a single charge cycle.
Currently available
Unlike many robots that remain in development or prototype stages, the Stretch 4 is available for purchase today. This means you can evaluate the actual shipping product rather than making decisions based on projected specifications that may change before release.
What to consider carefully
Premium investment required
At $29,950, the Stretch 4 represents a significant investment. While the price reflects the advanced technology and engineering involved, it places the robot firmly in the professional or enterprise segment. Buyers should build a thorough ROI analysis and consider the total cost of ownership, including integration, training, and ongoing maintenance.
Note: This strengths and trade-offs assessment is based on the Stretch 4'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 Hello Robot 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 Home Assistants Robot Technology Works
Understanding the engineering behind this category
Home assistant robots combine mobility, intelligence, and physical manipulation to perform tasks that stationary smart devices simply cannot. While a smart speaker can tell you the weather, a home assistant robot can bring you an umbrella. This emerging category represents the convergence of multiple robotic technologies — navigation, manipulation, AI, and human-robot interaction — into a single household platform.
Navigation & Mobility
Home assistant robots must navigate the complex, cluttered, and constantly changing environment of a lived-in home. They use LiDAR, cameras, and depth sensors to build and continuously update maps of the home interior, handling furniture rearrangements, opened or closed doors, and transient obstacles like shoes and toys. Path planning must account for the robot's size (including any carried objects), doorway widths, carpet transitions, and areas where humans are present. Advanced systems create semantic maps that understand room functions — knowing the kitchen from the bedroom enables context-appropriate behavior like adjusting movement speed or interaction style.
The Role of AI
AI in home assistant robots must bridge the gap between high-level human instructions and low-level physical actions. When asked to bring a glass of water, the robot must understand the request, plan the task sequence (navigate to kitchen, find a glass, operate the tap, carry without spilling), and execute each step while handling unexpected situations. Foundation models and vision-language models are increasingly central to this task comprehension capability. The AI must also maintain context across interactions — remembering where items are usually kept, learning household routines, and anticipating needs based on time of day and activity patterns.
Sensor Fusion & Perception
Home assistant robots require comprehensive perception that combines environmental mapping with object-level understanding. Cameras and depth sensors identify objects and their positions. Force sensors in hands and arms enable safe grasping and manipulation without crushing or dropping items. Proximity sensors prevent collisions during navigation, especially when carrying objects that extend the robot's footprint. Audio processing detects and localizes voice commands from anywhere in the home. Some robots include sensors for detecting spills, open doors, or unusual sounds that might indicate a problem requiring attention.
Power & Battery Management
Home assistant robots face challenging power requirements due to the combination of mobility, computation, and manipulation. Battery technology limits operational time to several hours before recharging is needed. Smart power management prioritizes tasks by urgency and groups actions by location to minimize unnecessary movement. Autonomous docking and charging ensure availability when needed. Some designs use lighter-weight arms and efficient actuators to reduce power consumption during manipulation tasks. The ability to plan efficient routes through the home — minimizing backtracking and unnecessary movement — directly impacts how much useful work the robot can accomplish per charge cycle.
Safety by Design
Operating a robot with arms and hands in a home with people requires extensive safety engineering. Force-limiting actuators prevent the robot from exerting dangerous grip or impact forces. Speed reduction in the presence of detected humans protects against collision injuries. Object-drop prevention systems ensure the robot does not release carried items unexpectedly. Hot-liquid and sharp-object handling requires specialized grip and stability control. Emergency stop mechanisms allow any household member to immediately halt the robot. The system must fail safely — if power is lost while carrying an object, the gripper should default to a secure hold rather than releasing.
What's Next for Home Assistants Robots
Home assistant robots are at an early but rapidly advancing stage. The convergence of foundation models (for understanding tasks), improved dexterous manipulation (for executing them), and decreasing hardware costs (for making them accessible) is accelerating development. Near-term advances will likely focus on specific task competency — robots that excel at a few useful tasks rather than attempting to do everything. As these capabilities mature and costs decrease, the scope of home assistant robots will gradually expand toward the vision of a truly general-purpose household helper.
The Stretch 4 by Hello Robot incorporates many of these technology pillars. For a detailed look at the specific sensors and components used in the Stretch 4, see the sensor analysis and connectivity sections above, or browse the complete components glossary for explanations of every technology used across the robotics industry.
Stretch 4 in the Home Assistants Market
How this robot compares in the home assistants landscape
With a price point of $29,950, the Stretch 4 is squarely in the enterprise/professional segment. This pricing typically includes integration support, commercial-grade warranties, and ongoing software updates.
With 7 sensor types, the Stretch 4 has an extensive sensor suite. This comprehensive sensing capability places it among the more perception-capable robots in the home assistants category, enabling more robust autonomous operation in varied conditions.
Being currently available for purchase gives the Stretch 4 a practical advantage over competitors still in development or prototype stages. Buyers can evaluate the actual product rather than relying on spec-sheet promises that may change before release.
Head-to-Head Comparisons
Side-by-side specs, capability overlap analysis, and key differentiators.
For the full picture of Hello Robot's portfolio and market strategy, visit the Hello Robot manufacturer page.
Deployment Readiness and Procurement Signals for Stretch 4
What the public profile tells you, and what still needs direct vendor confirmation
From a buying and rollout perspective, the Stretch 4 should be read as a home assistants platform aimed at connected homes that want a mobile smart-home touchpoint. ui44 currently tracks 11 capability signals, 7 sensor inputs, and a last verification date of 2026-05-13. 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 Hello Robot.
Integration posture
Integration details thin
The page does not list any connectivity standards, so procurement teams should verify network requirements, remote management options, and how the robot fits into existing software or facility infrastructure.
Spec disclosure
5/7 core specs public
ui44 currently has 5 of 7 core physical and operating specs filled in for this model, leaving 2 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 detailed enough to support early comparison work, shortlist creation, and cross-checking against other home assistants robots. It is still worth validating the final deployment package, because integration services, support coverage, software entitlements, and site-preparation requirements often sit outside the raw hardware spec sheet.
If you want a faster apples-to-apples read, compare the Stretch 4 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 Hello Robot profile helps anchor this robot inside the wider product lineup.
Before you sign off on a pilot, confirm these points
- 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.
- Check what safety, electrical, or deployment certifications exist for the region and task you care about.
Owning the Stretch 4: Setup, Maintenance & Tips
Practical guide from day one through years of ownership
Initial Setup
Home assistant robot setup involves physical placement, network configuration, environment mapping, and capability training. Place the charging dock in an accessible central location. Connect to your home Wi-Fi and smart home platform. Run the initial mapping session with all doors open and the home in its typical state. After mapping, configure room names, restricted areas, and any smart home integrations. For robots with manipulation capabilities, the setup may include teaching specific tasks by demonstration or configuring task parameters through the app. Expect to invest several sessions over the first week refining the robot's understanding of your home and preferences.
Ongoing Maintenance
Home assistant robots combine the maintenance needs of mobile platforms with those of manipulation systems. Weekly tasks include cleaning sensors, checking wheels and arm joints for debris, and verifying gripper functionality. Monthly maintenance should cover thorough sensor cleaning, software updates, and calibration checks. If the robot handles food or liquids, clean any contact surfaces after each use according to the manufacturer's hygiene guidelines. Monitor battery performance over time and report any significant degradation to the manufacturer.
Software Updates & Long-Term Support
Home assistant robot software updates are particularly impactful because they can add entirely new task capabilities. A robot that launches with five core tasks might gain additional abilities through software updates as the manufacturer develops and validates new skills. Keep automatic updates enabled and review update notes to discover new capabilities you might not have known were added. Major platform updates may also improve task execution quality for existing capabilities — making the robot more reliable and efficient at tasks it could already perform.
Maximizing Longevity
Home assistant robots represent a significant investment, and proper care maximizes that investment's return. Avoid exceeding payload limits when the robot carries objects. Keep the operating environment reasonably tidy to reduce navigation challenges. Maintain clean, unobstructed sensor surfaces for reliable operation. For robots with arms, avoid forcing joints beyond their range of motion. Address any unusual sounds or behaviors promptly — early intervention prevents small issues from becoming expensive repairs. Consider a manufacturer service plan for access to priority support and replacement parts.
For Hello Robot-specific support resources and documentation, visit the Hello Robot page on ui44 or check the manufacturer's official website at Hello Robot's product page.
Frequently Asked Questions
What is the Stretch 4?
The Stretch 4 is a Home Assistants robot made by Hello Robot. Hello Robot's 2026 Stretch 4 is a wheeled mobile manipulator built for real homes, research labs, and workplace pilot deployments. It keeps the Stretch line's open ROS 2/Python developer model while adding a compact omnidirectional base, self-charging, longer 8-hour light-load runtime, a 160cm working height, and a stronger telescoping arm rated for 2.5kg extended or 4kg retracted payloads. Official materials position it as available now, with reference demos for mapping, navigation, 3D SLAM, data collection, and VLM grasping; IEEE Spectrum reports that Stretch 4 is also intended for in-home assistive pilots with people who have severe mobility impairments. It is still a high-cost developer/assistive platform rather than a mass-market consumer appliance. It features 7 sensor types, 0 connectivity protocols, and 11 distinct capabilities.
How much does the Stretch 4 cost?
The Stretch 4 is listed at $29,950 ($29,950 list price; available now for research/enterprise buyers and in-home assistive pilot deployments). This places it in the enterprise tier for home assistants robots. Prices may vary by region and retailer.
Is the Stretch 4 available to buy?
Yes, the Stretch 4 is currently available for purchase. Check Hello Robot's official website or authorized retailers for the latest stock and ordering options.
What sensors does the Stretch 4 have?
The Stretch 4 is equipped with 7 sensor types: Wide-FOV depth sensing, High-resolution RGB cameras, Calibrated RGB + depth perception, Floor hazard sensing, Pair of hemispherical LiDARs, Luxonis vision/navigation cameras, Wrist-mounted depth camera. These sensors work together through sensor fusion to provide comprehensive environmental awareness for autonomous operation. See the sensor analysis section for details.
How long does the Stretch 4 battery last?
The Stretch 4 has a rated battery life of 8 hours (light CPU load). Actual battery performance may vary based on usage intensity, ambient temperature, and specific tasks being performed. Heavy workloads like continuous navigation and sensor processing will consume battery faster than idle or standby modes.
What AI does the Stretch 4 use?
The Stretch 4 is powered by Open-source ROS 2 and Python SDK with reference autonomy demos for mapping, navigation, 3D SLAM, data collection, and VLM grasping; IEEE Spectrum reports Intel NUC 15 plus NVIDIA Jetson Orin NX onboard compute.. 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 Stretch 4 compare to the Stretch 3?
The Stretch 4 and Stretch 3 are both home assistants 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 Stretch 4 work with smart home systems?
Yes, the Stretch 4 is compatible with: ROS 2, Python SDK. 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 Stretch 4 data on ui44?
The Stretch 4 specifications on ui44 were last verified on 2026-05-13. All data is sourced from official Hello Robot documentation, spec sheets, and press releases. If you notice any outdated information, please let us know.
Data Integrity
All Stretch 4 data on ui44 is verified against official Hello Robot sources, including spec sheets, product pages, and press releases. Last verified: 2026-05-13. Official source: Hello Robot product page. If you find outdated or incorrect information, please let us know — accuracy is our top priority.
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