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The July 2024 leak was genuine: it revealed the redesigned Nest Learning Thermostat (4th gen) and a new remote temperature sensor before Google announced them. The thermostat launched on August 20, 2024, with a larger display, a new backplate, Matter support and one sensor included. The design and core features largely matched the leaks, though leaked interface details should not be treated as a promise that every screen shipped unchanged.
What the July 2024 leak showed
On July 24, unofficial images shared by leaker MysteryLupin showed a new Nest thermostat and a redesigned Temperature Sensor. The images were a leak, not a Google announcement; reporting also connected the device to an earlier FCC filing. A second round of leaked promotional material around July 28 showed more of the interface and suggested features, pricing and closer Google Home integration. An early unboxing reported later that month added views of the packaging, finishes and included installation pieces. The first report, the follow-up on the software and features and the unboxing were all pre-launch coverage.
The broad picture proved accurate. Google announced the Nest Learning Thermostat (4th gen) on August 13, 2024, and said it would be available from August 20 in the United States and Canada. The company later confirmed the redesigned hardware, sensor bundle, Matter support and most of the major features. Treat specific leaked interface screenshots and claims not repeated in official specifications as reports about a pre-release product, not final guarantees.
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The 4th gen replaces the familiar third-generation look with curved, domed glass over a larger, borderless-looking screen and a slimmer rotating metal ring. Its polished finishes are Silver, Gold and Obsidian. Google specifies a 3.9-inch (98-mm) diameter, 1.1-inch (29-mm) depth and 5.7-ounce (161.8-g) weight. The circular LCD is 600 by 600 pixels and about 2.7 inches (68 mm) across; Google describes it as 60% larger than the previous model’s display. Google’s technical specifications provide the hardware figures.
#1 Best Overall
- Nest’s smartest, most advanced thermostat yet, the Google Nest Learning Thermostat (4th gen) is a beautiful, brilliant way to save energy, keep your home comfortable, and help make sure your heating and cooling systems are running smoothly[4]
- Savings you can count on: The Nest Learning Thermostat can help save up to 31% on heating and cooling bills [2]
- Improved compatibility: It works with most 24V systems, including gas, electric, oil, forced air, heat pump, and radiant, and no C wire is required for installation in most homes; visit the Nest Compatibility Checker for more info[5]
- Easy control in the Google Home app: Adjust on your phone from anywhere[1] or by using your voice with Alexa, Siri, or Google Assistant smart speaker[3], it’s easy to install yourself and it’s Matter compatible for simple integration into your smart home[5]
- Beautiful design: With a 60% larger display[11] and Dynamic Farsight, you can see info from across the room[1]; choose the design, like a clock or the weather; it automatically adjusts brightness for the best readability or you can adjust manually
The screen is more than a larger temperature readout. Dynamic Farsight can show information such as the indoor or outdoor temperature, time, date, humidity, air quality and readings from a Nest Temperature Sensor. A built-in Soli motion sensor supports motion-aware behavior, and the interface adds animations and customizable screen content. Google also refreshed the Climate and Google Home app experiences. The leaked screens anticipated a new software direction, but the final feature descriptions—not every leaked image—are the sound basis for understanding what the released thermostat does. Google’s Farsight help page explains the available display information.
The backplate and trim plate have also changed. The package includes a steel plate for installation situations that need extra support. For a homeowner replacing a third-gen unit, the new appearance does not mean the old mounting hardware can simply be left in place: plan for the new backplate and possible trim or wall work.
Rank #2
- Nest’s smartest, most advanced thermostat yet, the Google Nest Learning Thermostat (4th gen) is a beautiful, brilliant way to save energy, keep your home comfortable, and help make sure your heating and cooling systems are running smoothly[4]
- Savings you can count on: The Nest Learning Thermostat can help save up to 31% on heating and cooling bills[2]
- Improved compatibility: It works with most 24V systems, including gas, electric, oil, forced air, heat pump, and radiant, and no C wire is required for installation in most homes; visit the Nest Compatibility Checker for more info[5]
- Easy control in the Google Home app: Adjust on your phone from anywhere[1] or by using your voice with Alexa, Siri, or Google Assistant smart speaker[3], it’s easy to install yourself and it’s Matter compatible for simple integration into your smart home[5]
- Beautiful design: With a 60% larger display[11] and Dynamic Farsight, you can see info from across the room[1]; choose the design, like a clock or the weather; it automatically adjusts brightness for the best readability or you can adjust manually
Why the new temperature sensor matters—and what it cannot do
The second-generation Nest Temperature Sensor is a wireless remote sensor that measures temperature in another room. If a bedroom runs warm or a home office stays cool, the thermostat can use a selected room’s reading as its comfort reference rather than relying only on the temperature at the wall unit. The redesigned sensor has a rounded form, can sit on a surface and has a mounting option. Google included one with the fourth-generation thermostat.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallIt is not a multi-zone controller. A sensor does not independently operate heating or cooling for its room; it changes the reading used by the thermostat to guide the home’s HVAC system. It may help address uneven comfort, but it cannot correct blocked vents, poor airflow, inadequate insulation or a failing system. Leaked coverage reported battery life of up to three years; do not treat that reported figure as an official guarantee unless it appears in current product documentation. Google’s launch materials listed additional sensors at $39.99 each or $99.99 for a three-pack in the U.S.
Rank #3
- Nest’s smartest, most advanced thermostat yet, the Google Nest Learning Thermostat (4th gen) is a beautiful, brilliant way to save energy, keep your home comfortable, and help make sure your heating and cooling systems are running smoothly[4]
- Savings you can count on: The Nest Learning Thermostat can help save up to 31% on heating and cooling bills[2]
- Improved compatibility: It works with most 24V systems, including gas, electric, oil, forced air, heat pump, and radiant, and no C wire is required for installation in most homes; visit the Nest Compatibility Checker for more info[5]
- Easy control in the Google Home app: Adjust on your phone from anywhere[1] or by using your voice with Alexa, Siri, or Google Assistant smart speaker[3], it’s easy to install yourself and it’s Matter compatible for simple integration into your smart home[5]
- Beautiful design: With a 60% larger display[11] and Dynamic Farsight, you can see info from across the room[1]; choose the design, like a clock or the weather; it automatically adjusts brightness for the best readability or you can adjust manually
Leak claims versus the product Google released
| What leak coverage indicated | What the released product confirms |
|---|---|
| Curved-glass redesign and slimmer ring | Confirmed in the fourth-generation hardware. |
| Larger display and a redesigned interface | The larger display and updated experience shipped. Do not assume every leaked screen or detail remained identical. |
| A new remote temperature sensor | Confirmed; one second-generation sensor is included with the thermostat. |
| Price around $279.99 | Confirmed as the U.S. launch MSRP. |
| Google Home emphasis and Matter | Confirmed. Initial setup uses Google Home; Matter enables use with compatible platforms, subject to feature availability in each one. |
| Soli or presence sensing | Google lists Soli motion sensing among the thermostat’s sensors. |
| Energy and HVAC features | Google markets Adaptive Eco, Smart Schedule, natural heating and cooling, smart ventilation and system-monitoring features. Some depend on the HVAC system. |
Google’s launch announcement confirmed the central hardware and feature story. Google describes energy-oriented features, but actual household energy use depends on factors such as climate, insulation, HVAC equipment, occupancy and settings; the feature names do not establish a particular savings result.
Price, availability and smart-home compatibility
At U.S. launch, the thermostat’s MSRP was $279.99; Google announced a Canadian launch price of C$379.99. The additional-sensor prices above are also U.S. figures from Google’s launch materials. In the commercial snapshot dated August 16, 2026, Google listed a $279.99 regular price, and one U.S. Store page view displayed a $239.99 promotion. That sale price is a dated offer, not the standard price; check the Google Store listing for current availability and price. The announced launch markets were the United States and Canada; availability should not be assumed worldwide.
Rank #4
- Professional installation Recommended! Advanced Compatibility & Performance: Works with most 24V systems, including gas, electric, oil, forced air, heat pump, radiant heating, dual-fuel systems, geothermal systems, and zoned HVAC systems, with professional calibration for maximum efficiency.
- Optimized for Professional Installation: Designed for seamless integration by certified installers, ensuring proper configuration and peak performance for your heating and cooling systems.
- Enhanced Energy-Saving Features: Includes the Nest Temperature Sensor for precise room-based temperature control, with professional tuning to minimize energy waste and adapt to your specific system needs.
- Premium Support Services: Access to specialized customer support, ensuring smooth operation and rapid troubleshooting tailored to professionally installed devices.
Matter broadens the thermostat’s ability to work with compatible smart-home platforms and assistants, including Apple Home or Alexa where supported. It does not ensure that every Google Home feature—such as every sensor control, energy tool or scheduling option—will be available in the same way in a third-party app. Initial setup requires Google Home, and the fourth gen is managed in that environment rather than being a direct continuation of the older Nest-app experience. Check the specific controls you rely on in your chosen platform before buying.
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4th gen versus 3rd gen: what changes for an owner?
| Area | 3rd-generation Nest Learning Thermostat | 4th-generation Nest Learning Thermostat |
|---|---|---|
| Display | Older, smaller display design | About 60% larger circular display with Dynamic Farsight |
| Remote sensing | Temperature sensor available separately | One second-generation sensor included |
| Smart-home standards | No Matter support | Matter support for compatible platforms |
| Installation hardware | Previous-generation backplate | Redesigned backplate and trim options |
| Controls and setup | Older Nest-era experience | Google Home-centered setup and management |
| U.S. launch MSRP | $249.99 | $279.99 |
The fourth gen is a substantive redesign, not just a cosmetic refresh. It is most compelling if you want a larger, more informative display, need to prioritize another room’s temperature, use Matter devices, or need the expanded HVAC support. It is less compelling as an upgrade if a functioning third-gen thermostat already handles your schedule and comfort needs, you do not need Matter or remote sensing, and replacing hardware would add little practical value. The older model may also make more sense if available at a substantially lower price.
Best Value
- ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Connectivity : Wi-Fi - 802.11b/g/n 2.4 GHz, 802.11a/n 5 GHz Wi-Fi., Wireless interconnect : Bluetooth Low Energy Please refer to the product description section below for all applicable legal disclaimers.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page
- The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory
- Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home. Lock feature: No
- Programmable thermostat that lets you create an energy efficient schedule in the Google Home app on your Android or iPhone
- Remote control lets family members change the thermostat temperature from anywhere on a phone, laptop, or tablet[1]
For buyers whose main requirement is extensive room-by-room control, or who prefer a touchscreen or a different smart-home ecosystem, compare alternatives such as ecobee or Honeywell Home on their own compatibility and feature merits. A single remote sensor on the Nest is not a substitute for independently controlled HVAC zones. There is no basis here to promise that one brand saves more energy than another.
Check the HVAC system before ordering
The fourth gen is designed for most 24-volt systems, including many gas, electric, oil, forced-air, heat-pump and radiant systems, as well as certain ventilation, humidifier and dehumidifier configurations. It supports 2.4-GHz and 5-GHz Wi-Fi and draws power through HVAC wiring, with a built-in rechargeable battery. Google says many installations can work without a common wire, but wiring and system exceptions exist.
- Use Google’s compatibility and wiring information before buying. “Most systems” does not mean every system.
- Photograph existing thermostat wiring before removing anything, and shut off HVAC power before installation.
- Expect to install the new backplate. A wall outline, paint mismatch or need for trim may matter when replacing an older thermostat.
- Get a professional assessment for dual-fuel heat pumps, whole-home humidifiers or dehumidifiers, complex ventilation controls, or wiring that does not map clearly to the compatibility guidance.
Do not choose terminals or improvise wiring based only on a general article: the correct setup depends on the actual equipment and wiring. Google’s specifications and compatibility checker are the safer starting point.
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Who should buy it?
- Good fit: a new Google Home installation, a home with a useful room-temperature sensor location, or a Matter household that wants broader platform interoperability.
- Consider carefully: a satisfied third-gen owner. The upgrade brings real hardware and ecosystem changes, but its value depends on whether you will use them and whether you are comfortable changing the backplate and app experience.
- Poor fit: someone expecting a sensor to create independent room zones, fix airflow problems, or provide every Google feature through any Matter app; or a household with HVAC equipment whose compatibility is uncertain.
One early-user complaint reported a dim display, but that is not evidence of a universal defect or a measured failure rate. If screen brightness is especially important to you, inspect the display in person or check recent owner feedback before purchase.
How the leak became a product
- July 24, 2024: the initial unofficial leak showed the redesigned thermostat and second-generation sensor.
- July 28–31: further promotional-material leaks and an early unboxing revealed more of the software, finishes, accessories and alleged pricing.
- August 13: Google announced the Nest Learning Thermostat (4th gen) and its accompanying sensor.
- August 20: availability began in the U.S. and Canada.
In hindsight, the leak got the product’s major direction right: a more prominent display, a revised design, a new sensor and a stronger Google Home and Matter story. The useful buying question now is not whether the rumor was true, but whether those changes suit your rooms, HVAC system and smart-home setup.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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