# Whisker Litter-Robot 4 vs Whisker Litter-Robot 5

As of Oct 26, 2026, the Whisker Litter-Robot 4 costs $699 and the Whisker Litter-Robot 5 costs $799, so the Whisker Litter-Robot 4 is $100 cheaper. Pick the Whisker Litter-Robot 4 for one to four average size cats. Pick the Whisker Litter-Robot 5 for large cats and multi cat homes.

Prices checked Oct 26, 2026. HTML version: https://robotsforthat.com/vs/whisker-litter-robot-4-vs-whisker-litter-robot-5/

## Side by side

| | Whisker Litter-Robot 4 | Whisker Litter-Robot 5 |
|---|---|---|
| Price | $699 | $799 |
| 3 year cost | $1,035 | $955 |
| Our score | Not scored yet | Not scored yet |
| Rank in Litter box | #16 | #18 |
| Status | on sale | on sale |
| Warranty | 1 year (WhiskerCare), extendable to 3 years; 90 day in home trial | 1 year (WhiskerCare), extendable to 3 years; 90 day in home trial |
| Cat weight range | 3 to 25 lb (kittens under 3 lb need semi automatic mode) | 3 to 30 lb |
| Max cats | Up to 4 | Up to 5 |
| Waste drawer | Sealed drawer with carbon filter, as little as once every 8 days (maker claim) | Sealed drawer with carbon filter, up to 10 days for one cat (maker claim) |
| Sensors | Laser and weight sensors, SmartScale cat weight tracking, SafeCat system | Multiple lasers, weight sensing, SmartScale, WasteID urine vs stool detection, SafeCat system |
| App | Whisker app (2.4 GHz WiFi); free 7 day view, Whisker+ optional | Whisker app (2.4 GHz WiFi); free tier shows 7 days of visits and weights |
| Litter type | Clumping clay recommended; crystals only if they pass the screen; plant based and pellet litters not recommended | Clumping clay recommended; plant based, non clumping, paper and pellet litters not recommended |
| Size | 22 x 27 in footprint, 29.5 in tall, 15.75 x 15.75 in entry, 24 lb empty | 22 x 27 in footprint, 29.9 in tall, 15.75 x 15.75 in entry, 28.7 lb empty |
| Noise | No dB rating published; QuietSift motor | No dB rating published; QuietSift motor |
| Best for | one to four average size cats | large cats and multi cat homes |
| Skip if | your cat is over 25 lb | you want the lowest price from Whisker |

## What reviewers found

### Whisker Litter-Robot 4

- Cats.com: Runner Up in the October 2026 roundup; reliable and well built, but the smaller litter bed may not suit large cats. [Source](https://cats.com/reviews/best-self-cleaning-litter-box)
- The Irish Times: Quiet, no smells and a clean tray in a home test; sensors stopped the drum when a cat entered; app cat ID was less accurate for cats of similar size. [Source](https://www.irishtimes.com/technology/consumer-tech/review/2026/10/03/litter-robot-4-review-fed-up-with-scooping-cat-litter-try-this/)
- CNN Underscored: Drawer needed emptying about once a week with two cats; quieter than the Litter-Robot 3; cats took about a week to adjust. [Source](https://amp.cnn.com/cnn/cnn-underscored/reviews/litter-robot-4-review)

### Whisker Litter-Robot 5

- Cats.com: Described in the October 2026 roundup as nearly the same as the 5 Pro without cameras, saving $100. [Source](https://cats.com/reviews/best-self-cleaning-litter-box)
- 9to5Toys: Review of the 5 series found it quieter, smoother and less sensitive to placement on carpet than the Litter-Robot 4, with a better carbon filter. [Source](https://9to5toys.com/2026/04/14/review-whisker-litter-robot-5-elevate-homes-with-space-age-improvements/)

## Questions buyers ask

### Which is better, the Whisker Litter-Robot 4 or the Whisker Litter-Robot 5?

Pick the Whisker Litter-Robot 4 for one to four average size cats. Pick the Whisker Litter-Robot 5 for large cats and multi cat homes.

### Which is cheaper?

The Whisker Litter-Robot 4 at $699, versus $799 for the Whisker Litter-Robot 5, checked Oct 26, 2026. Over 3 years with running costs: $1,035 vs $955.

### What is the difference between the Litter-Robot 4 and the Litter-Robot 5?

Cat weight range: 3 to 25 lb (kittens under 3 lb need semi automatic mode) on the Litter-Robot 4, 3 to 30 lb on the Litter-Robot 5. Max cats: Up to 4 on the Litter-Robot 4, Up to 5 on the Litter-Robot 5. Waste drawer: Sealed drawer with carbon filter, as little as once every 8 days (maker claim) on the Litter-Robot 4, Sealed drawer with carbon filter, up to 10 days for one cat (maker claim) on the Litter-Robot 5.

Full reviews: [Whisker Litter-Robot 4](https://robotsforthat.com/robot/whisker-litter-robot-4/index.md), [Whisker Litter-Robot 5](https://robotsforthat.com/robot/whisker-litter-robot-5/index.md)