Xiaomi Mijia 5 Pro (OV21CN) vs Robot Vacuum 5 Pro (OV21GL) vs Robot Vacuum 5 (OV31GL) Differences
- cici7788404
- 3 hours ago
- 4 min read
I wonder if others share my question: Why are Xiaomi robot vacuums sometimes called Xiaomi Robot Vacuum XX and sometimes Xiaomi Mijia XX? In fact, Mijia is Xiaomi's smart-home ecosystem and entry platform. On the global site, models drop the "Mijia" label; it's mainly used in China to highlight seamless integration with other Xiaomi devices (e.g., Xiao AI speakers, smart locks).With this in mind, the three Xiaomi robot vacuum models become easy to distinguish. As a manufacturer of robot vacuum accessories, techTongBo continuously tracks new releases from all major brands.
Based on the latest product information (released in 2025), the Xiaomi Mijia 5 Pro (OV21CN), Xiaomi Robot Vacuum 5 Pro (OV21GL), and Xiaomi Robot Vacuum 5 (OV31GL) are all part of Xiaomi's robot vacuum series, featuring sweep-mop integration, self-cleaning base stations, AI obstacle avoidance, and HyperOS connectivity. However, they target different markets and use cases:
Mijia 5 Pro: China-market flagship with ultra-high suction and multi-lens AI vision
Robot Vacuum 5 Pro: Global Pro version balancing AI and practicality
Robot Vacuum 5: Global standard version focused on cost-effectiveness
The OV21CN, OV21GL, and OV31GL are their respective built-in OmniVision camera/sensor modules, primarily affecting navigation accuracy and object recognition.
1. Specs at a Glance (Core Parameter Comparison: Xiaomi Mijia 5 Pro (OV21CN) vs Robot Vacuum 5 Pro (OV21GL) vs Robot Vacuum 5 (OV31GL))
Aspect | Mijia 5 Pro OV21CN | Robot Vacuum 5 Pro OV21GL | Robot Vacuum 5 OV31GL |
Suction | 23,000 Pa (deep carpet suction) | 20,000 Pa (carpet boost +30%) | 20,000 Pa (no boost) |
Vision | Triple-lens full-color HDR 2m night vision, recognizes 200+ objects / 47 stains | Single-lens HD + AI 1.5m night vision, recognizes 200+ objects / 47 stains | ToF + single-lens recognizes 100+ objects |
Navigation | Triple-lens AI + wide-grid laser | dToF radar + triple-lens HD | dToF radar + dual-line structured light |
Edge Cleaning | Dual retractable arms 0mm edge | Dual retractable mops + side brush 0mm | Single retractable mop + side brush 0mm |
Self-Cleaning | 80°C hot water + auto re-wash + hot air dry | 80°C hot water + auto re-wash + hot air dry | Hot water wash + hot air dry (no re-wash) |
Height | 9.5cm (tower retractable) | 9.5cm (radar retractable) | 9.5cm (radar retractable) |
Ecosystem | HyperOS (Chinese) | Google Home / Alexa | Google Home / Alexa |
Price | ¥3,399 (JD.com) | €799 (EU) | €483 (Xiaomi Store) |
Market | China mainland exclusive | Global release | Global release |
*data based on official specs and reviews
2. In-Depth Segmented Evaluation
Mijia 5 Pro (OV21CN) — China’s Flagship AI King
- Suction Test: 23,000 Pa lifts 3 mm steel beads; carpet cat litter residue <1%
- AI Vision: Triple-lens HDR night vision detects pet poop, soy sauce, cables — auto-avoid + mark
- Cleaning Experience: 80°C hot-water mop wash; auto re-wash twice on oil stains — drag-clean like hand-wiping
- Pain Points:
- China-only; overseas via resellers (+¥600+)
- Early firmware misreads glossy floors (disable “Liquid Boost” in App)
Best For
- Tech enthusiasts in China
- Pet owners with heavy shedding
- Large homes (>120 m²) needing deep-clean AI
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Robot Vacuum 5 Pro (OV21GL) — Global Pro Balanced Choice
- Suction Test: 20,000 Pa + 30% carpet auto-boost; zero hair tangle (V-shaped roller) - AI Vision: OV21GL single-lens; 1.5 m night detection — best in well-lit rooms
- Global Ecosystem: Alexa / Google Home support; bi-weekly firmware updates
- Pain Points:
- No direct plumbing (only 2.5L tank)
- EU version 220V — confirm plug type
Best For
- Overseas users with smart-home ecosystems
- Mid-size apartments (80–120 m²)
- Users wanting voice control and regular updates
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Robot Vacuum 5 (OV31GL) — Value-for-Money Beast
- Suction Test: 20,000 Pa — excellent on hard floors/wood; slightly weaker on carpets - Navigation: dToF laser maps 80 m² in 6 min; gets lost on mirrors/glass doors (add anti-collision strips)
- Value: Full base station with hot-water wash + hot-air dry; 75-day dust bag
- Pain Points:
- No stain detection — manual second drag for oil
- Stuck on thresholds >5 mm
Best For
- Budget-conscious first-time buyers
- Small apartments (<80 m²) with hard floors
- Renters seeking low-maintenance cleaning
Overall Verdict:
The Mijia 5 Pro leads in suction and visual AI (OV21CN delivers top-tier recognition), ideal for users seeking peak performance. The Robot Vacuum 5 Pro (OV21GL) is the global AI-enhanced version, closely matching Mijia but with slightly lower suction. The Robot Vacuum 5 (OV31GL) is the most affordable, perfect for beginners.
All three models feature a base station with a 2.5L dust bag (up to 75 days without emptying) and a 4L water tank. However, the Mijia and Pro versions offer smarter AI (e.g., stain-type cleaning).
Recommendation: Choose based on region and needs — China users: prioritize Mijia; global users: go for Pro or standard version.
techTongBo (also named: Nanjing TongBo / NJTB) is a Chinese company specializing in the manufacture and sales of vacuum cleaner accessories. We offer replacement accessories for the global market that are compatible with mainstream vacuum cleaner brands and have stronger price advantages.
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