The Optoma GT4000UHD is the latest addition to the brand’s UST lineup, following the compact PhotonGo from earlier in 2025, the GT3500HDR from 2024, and the CinemaX D2 Smart from 2022. It builds directly on the GT3500HDR, upgrading from 1080p to true 4K UHD resolution, boosting brightness to 4,000 lumens, and refining performance for home theater and gaming enthusiasts.
Lasers & HDR
The GT4000UHD uses Optoma’s DuraCore laser light source, delivering up to 4,000 lumens of brightness and up to 30,000 hours of life in Eco mode. It offers a native contrast ratio of 500,000:1, supports both HDR10 and HLG, and can project a 100-inch image from just under 12 inches away (up to 120 inches max), making it ideal for big-screen viewing and gaming in tight spaces.
4K UHD via Pixel Shifting
Similar to other 4K UHD DLP projectors, the GT4000UHD incorporates a 0.47-inch-sized 1080p DLP imaging chip—also known as a Digital Micromirror Device (DMD)—from Texas Instruments. This chip contains 2.1 million tiny mirrors (pixels), which is far fewer than the 8.3 million pixels required for true 4K resolution.
In order to make up the pixel number difference needed for 4K UHD Resolution display, the GT4000UHD rapidly shifts the pixels both vertically and horizontally at a rate of 240 times per second (240Hz). This pixel-shifting technique happens so quickly and precisely that the final result is classified as a 4K image when projected on a screen or wall.
Gaming
For PC gamers, the GT4000UHD keeps input lag to a minimum: just 8ms at 120Hz and 4.3ms at 240Hz in 1080p mode, and 16.9ms at 60Hz in 4K. That means fast, responsive gameplay whether you’re chasing high frame rates or higher resolution.
Setup Tools
For easy installation, the GT4000UHD is equipped with four-corner keystone correction and 360-degree and portrait modes. Physical connections include three HDMI 2.0 inputs (one is eARC compatible). The GT4000UHD includes a single built-in speaker powered by a modest 115-watt amp—which is fine if you’re watching the news at grandma’s. But if you actually care about sound, use the HDMI-eARC port and connect it to a real audio system, soundbar, or AV receiver. It’s there for a reason—don’t let good picture quality suffer with weak audio.
From Billy Harrison, Product Manager at Optoma: “With consumers seeking flexible projection solutions for a variety of home usage scenarios, we’ve introduced our latest ultra short throw alternative with the GT4000UHD, delivering incredible brightness and true-to-life color in a new compact design….A suite of convenient installation features makes the GT4000UHD an ideal projector for any space and takes the big screen experience to new levels for competitive gaming, home entertainment, or home offices.”
Comparison
| Model | GT4000UHD (2025) | GT3500HDR (2024) |
| Price | $4,499 | $1,499 |
| Projector Type | UST (Ultra Short Throw) | UST (Ultra Short Throw) |
| Display Technology | DLP | DLP |
| Light Source Type | DuraCore Laser | DuraCore Laser |
| Light Source Life | 30,000 hours (Eco Mode) | 30,000 Hours (Eco Mode) |
| Resolution | 4K UHD (3840×2160) via Pixel Shifting | 1080p Full HD |
| Brightness (While Light Output) | 4,000 lumens | 3,800 Lumens |
| HDR Support | HDR10, HLG | HDR10, HLG (via 4K UHD Input) |
| Contrast Ratio | 500,000:(Native) 1,700,000:1 (Dynamic) | 500,000:1(Native) |
| Native Aspect Ratio | 16:9 | 16:9 |
| Aspect Ratio Compatible | 4:3,16:9 | 4:3, 16:9 |
| Keystone Correction | 5°+/- Four corner correction | Horizontal: +/- 5 degrees, Vertical +/- 5 degrees |
| Horizontal Scan Rate | 15KHz ~ 150KHz | 15 ~ 140KHz |
| Vertical Scan Rate | 24KHz ~ 240KHz | 24 ~ 120Hz |
| Screen Uniformity | 75% | 75% |
| Screen Size | 100″ ~ 150″ diagonal | 80″ ~ 130″ diagonal |
| Projection Distance | 10.53″ – 21.43″ (<12 inches for 100-inch screen) | 7.95″ – 15.67″ |
| Throw Ratio | 0.25:1 | 0.253:1 |
| Zoom | Fixed | Fixed |
| Zoom Type | Fixed | Fixed |
| Focal Length (mm) | 3.7 mm | 3.7 mm |
| Lens Shift | No | No |
| Native Offset | 120% ( + or – 5%) | Yes |
| Inputs | 1 x HDMI 2.0, 1 x HDMI 2.0 (eARC), 1 x USB service shared with USB-A power, 1 x DC | 2 x HDMI 2.0 |
| Outputs | 1 x Audio 3.5mm, 1 x 3D sync | 1 x Audio 3.5mm, 1 x 3D sync, 1 x USB-A power 1.5A |
| Control | 1 x RS232, 1 x RJ45, 1 x HDBaseT 4K, IR Remote | 1 x RS232, 1 x RJ45, |
| Noise Level | Min: 29dB Max: 34dB | 27dB Eco Mode |
| 3D | Full 3D | Full 3D |
| Security | Security bar, Kensington Lock | Security bar, Kensington Lock, Password-protected interface |
| OSD / Display Languages | 25 languages: Arabic, Czech, Danish, Dutch, English, Farsi, Finnish, French, German, Greek, Hungarian, Indonesian, Italian, Japanese, Norwegian, Polish, Portuguese, Romanian, Russian, Chinese (simplified), Spanish, Swedish, Chinese (traditional), Turkish, Vietnamese | 25 languages: Arabic, Czech, Danish, Dutch, English, Farsi, Finnish, French, German, Greek, Hungarian, Indonesian, Italian, Japanese, Norwegian, Polish, Portuguese, Romanian, Russian, Chinese (simplified), Spanish, Swedish, Chinese (traditional), Turkish, Vietnamese |
| 24/7 Operation | Yes | Yes |
| 360° Operation | Yes | Yes |
| Operating Conditions | 0°C~40°C/32°F~104°F, max. altitude 3,048m/10,000ft, max. humidity operating 80%, non-operating 90% | 0°C~40°C/32°F~104°F, max. altitude 3,048m/10,000ft |
| Speaker System | 1 Channel x 15 watts | 1 Channel x 15 watts |
| Input lag | 16.9ms input lag at 8ms at 120Hz 1080p 4.3ms at 240Hz 1080p 16.9ms at 60Hz 4K | 8.6ms (1080p 120Hz) 17ms (1080p 60Hz) |
| Networking | Wired LAN | Wired LAN |
| IPX Rating | IP6X | IP6X |
| Power Supply | 250W | External power supply, 180W DC 19.5V, 9.23A |
| Power Consumption (Standby) | 0.5W | Standby: 0.5 watts – |
| Power Consumption (min) | 180 W +/- 15% (typical)@110VAC 178 W +/- 15% (typical)@220VAC | 119 watts |
| Power consumption (max) | 255 W +/- 15% (typical)@110VAC 250 W +/- 15% (typical)@220VAC | 173 Watts |
| Dimensions (WDH) | 12.87 x 12.91 x 3.35 inches | 12.87 x 12.87 x 4.29 inches |
| Weight | 9.92 lbs | 8.6 lbs |
| In The Box | Projector QSG (Quick Start Guide) Power Adapter and Cable Remote Batteries (2xAAA) | AC power cord Remote control 1x CR2025 Battery User Manual |
The Bottom Line
The Optoma GT4000UHD bumps up both the resolution and brightness over the earlier GT3500HDR, making it a strong contender for big-screen movie nights or immersive gaming. But let’s take a closer look.
The GT4000UHD is missing something that an increasing number of USTs are providing: a built-in Smart OS. For example, the Hisense PL2 ($2,499) and Formovie Cinema Edge ($2,199) both incorporate the Google TV OS, providing access to an abundance of streaming apps (including gaming apps). Of course, you can connect an external streamer (Roku, Fire TV, Apple TV) to the Optoma, but the convenience of having a system built-in is attractive for many.
Sure, Optoma wins the lumen war on paper, but both projectors are still bright enough to handle a semi-darkened room without breaking a sweat. Just don’t forget—like with most projectors—dropping $5K on the unit itself is only part of the story. You’ll want to factor in the cost of a proper screen if you actually want to see what you paid for.
Here’s the reality check: TVs are starting to squeeze projectors hard—on both size and price. For $3,999 or less, you can grab a 98-inch TCL QM7K or QM6K that doesn’t just give you a giant screen, but also tosses in built-in Google TV, Dolby Vision HDR, and brightness levels that the GT4000UHD (or almost any projector) simply can’t touch.
Sure, a projector like the GT4000UHD still delivers a more cinematic vibe for movie nights—but with streaming and gaming taking over, projectors are definitely starting to lose some ground.
Price & Availability
The Optoma GT4000UHD is available for an estimated street price of $4,499 (actual prices will vary) and can be purchased at Amazon USA ($5,299) and B&H Photo Video ($4,499).
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