Head-to-head
Osaki OS-3D Ai Vito vs Osaki OS-4000XT
Both chairs are compared using the same canonical specification records that power our reviews. Values are labelled in each review as Research Reviews.
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| Specification | ||
|---|---|---|
| Score: massage hardware | 8.4 | 5.9 |
| Score: body fit | 5.0 | 5.0 |
| Score: feature set | 8.2 | Not scored |
| Score: warranty | 3.0 | 3.0 |
| Score: controls | 10.0 | Not scored |
| Score: value | 9.0 | 7.4 |
| Recorded price (lowest named seller) | $1,999 | $4,799 |
| Best for | Entry 3D chair with AI body detection and voice control | Entry into a full-featured L-track chair |
| Roller technology | 3D | 2D |
| Track | SL track | L track |
| Track length | Not verified | Not verified |
| Air compression (airbags) | 44 | Not verified |
| Foot massage | Yes | Not verified |
| Calf massage | Not verified | Not verified |
| Heat | Lumbar, Calves | Lumbar |
| Zero gravity | 2 | Not verified |
| Body scan | Yes | Not verified |
| Stretch | Not verified | Not verified |
| Height range | Not verified in sources checked | Not verified in sources checked |
| Weight limit | 260 lbs | 260 lbs |
| Dimensions (upright) | 59.4" L x 29.5" W x 44.1" H | 67.2" L x 28.8" W x 44.5" H |
| Wall clearance | 6" | 2" |
| Warranty | 1 year parts and labor, with 2nd and 3rd year parts coverage | 1 year parts and labor, with 2nd and 3rd year parts coverage |
| ChairMentor verdict | Osaki's most affordable 3D chair and the entry point for adjustable roller depth. Research Review built from Osaki's official product page, with conflicting figures on Osaki's own pages flagged. | Osaki's long-running 2D L-track chair, now priced above the brand's newer 3D entry models. Research Review built from Osaki's official specification table; every figure below links to the page it came from. |
The short version
Osaki OS-3D Ai Vito: entry 3d chair with ai body detection and voice control. 3D rollers on a SL track, with a stated fit range of Not verified in sources checked. Read the full review.
Osaki OS-4000XT: entry into a full-featured l-track chair. 2D rollers on a L track, with a stated fit range of Not verified in sources checked. Read the full review.
How to decide
Start with fit. If only one chair covers your height and weight comfortably, the rest of the specification sheet is secondary. Then weigh track coverage against roller technology, and finally compare warranty terms from the specific retailer you intend to buy from.
This pairing is generated from the product database and does not yet carry an editorial verdict. Our curated head-to-heads are listed on the compare page.