Is the Nest Learning Thermostat (4th gen) Matter certified?

Yes. MatterCatalog matches it to CSA Matter certificate CSA24363MAT43542-24, certified Jun 23, 2024.

Does the Nest Learning Thermostat (4th gen) work with Apple Home or HomeKit?

Likely. It is Matter certified (certificate CSA24363MAT43542-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Apple Home on a page we hold. Apple says an iPhone using iOS 18 or later can add Matter accessories to the Home app without a home hub. Apple’s Matter page lists thermostats among the accessory types the Home app supports.

Does the Nest Learning Thermostat (4th gen) work with Google Home?

Yes. The maker’s own site names Google Home, and it is Matter certified (certificate CSA24363MAT43542-24). Google says you need a Matter-enabled hub device set up on your home wireless network before you can add Matter devices to Google Home. Google’s supported-device-types page lists the Thermostat type.

Does the Nest Learning Thermostat (4th gen) work with Alexa?

Likely. It is Matter certified (certificate CSA24363MAT43542-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Alexa on a page we hold. Alexa needs a Matter-compatible Echo; Amazon says its Echo devices support “a subset of Matter 1.5 and lower device types”, so check that yours does.

Does the Nest Learning Thermostat (4th gen) work with Samsung SmartThings?

Likely. It is Matter certified (certificate CSA24363MAT43542-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named SmartThings on a page we hold. SmartThings adds Matter devices through the SmartThings app and a Matter controller.

Does the Nest Learning Thermostat (4th gen) work with Home Assistant?

Likely. It is Matter certified (certificate CSA24363MAT43542-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Home Assistant on a page we hold. Home Assistant says: “Adding a new Matter device only works in the Home Assistant Companion app.”

Does the Nest Learning Thermostat (4th gen) use Thread or Wi-Fi?

Wi-Fi. Its catalog record lists Wi-Fi, so it joins your Wi-Fi network and does not need a Thread border router. You still need your platform’s Matter controller.

Does the Nest Learning Thermostat (4th gen) need a hub or a Thread border router?

No hub of its own and no Thread border router: it joins your Wi-Fi network. You still need your platform’s Matter controller (a smart speaker, display, streaming box or hub), though Apple says an iPhone using iOS 18 or later can add Matter accessories without a home hub.

When was the Nest Learning Thermostat (4th gen) Matter certified?

The CSA certified it on Jun 23, 2024 (certificate CSA24363MAT43542-24). That is its certification date, not a retail release date, which MatterCatalog does not state.

GoogleThermostats

Nest Learning Thermostat (4th gen)

CSA Certified5 retailer options · packages differ

The Nest Learning Thermostat (4th gen) is Matter certified (certificate CSA24363MAT43542-24, certified Jun 23, 2024). It uses Wi-Fi, so it needs no Thread border router, only your platform’s Matter controller. A certified Matter device can be added to any Matter controller whose app supports its device type, such as Apple Home, Google Home, Alexa, SmartThings or Home Assistant; features vary by app. The maker’s own site names Google Home. Sold in the US at Amazon, The Home Depot, Lowe's, Abt Electronics and Electronic Express.

Certificate data: CSA ledger read November 10, 2026. Set-up steps and sources: Apple Home · Google Home · Alexa · SmartThings · Home Assistant

CSA Matter certified (certificate CSA24363MAT43542-24). Uses Wi-Fi, so it needs no Thread border router, only your platform’s Matter controller.

At a glance: Matter certified: Yes, Jun 23, 2024 · Connectivity: Wi-Fi · Platforms: Google Home (named by the maker); Apple Home and Amazon Alexa (listed in its catalog record, unverified) · Thread border router: No

Works with: Google Home (named by the maker)
CSA certificate: CSA24363MAT43542-24, certified Jun 23, 2024
Network & hub: Wi-Fi; needs no Thread border router, only your platform’s Matter controller
Model number: GA05551-US

Updated Oct 13, 2026: the last change to this page’s certification, platform or store facts.

Independent guide. We may earn a commission through affiliate links. Direct non-affiliate links are labeled. How our links work

Google Nest Learning Thermostat (4th gen) Matter device

Sold at 5 stores

Amazon · The Home Depot · Lowe's · Abt Electronics · Electronic Express

Compare prices ↓

Price at retailer

Amazon

Compare prices

5 stores

Amazon

New · Silver finish · Nest Learning Thermostat (4th gen) + Temperature Sensor

See price at Amazon

Check price at Amazon

The Home Depot

See price at The Home Depot

Notes

Home Depot model GA05551-US: Polished Silver thermostat with one Nest Temperature Sensor (2nd gen), matching the Amazon listing's colour and bundle. Confirm current price, delivery and your HVAC compatibility at the retailer.

Check price at The Home Depot

Lowe's

See price at Lowe's

Notes

Lowe's model GA05551-US: Polished Silver thermostat with temperature sensor, matching the Amazon listing's colour and bundle. Confirm current price, delivery and your HVAC compatibility at the retailer.

Check price at Lowe's

Abt Electronics

See price at Abt Electronics

Notes

Link to Abt Electronics's US product page for Google Nest Learning Thermostat (4th Gen) in Polished Silver - GA05551-US; GTIN 193575038469 equals this record's GTIN; model/SKU GA05551-US matches this record's model. Confirm the exact variant, current price and delivery at the retailer.

Check price at Abt Electronics

Electronic Express

See price at Electronic Express

Notes

Link to Electronic Express’s product page for the Google Nest Learning Thermostat 4th Gen with Nest Temperature Sensor 2nd Gen - Polished Silver (part GA05551-US); its UPC 193575038469 equals this record’s GTIN. Confirm the exact variant, current price and delivery at Electronic Express.

Check price at Electronic Express

These are different packages and selections, not like-for-like prices. Check condition, pack quantity, included accessories and model before buying. Prices and availability are confirmed at each retailer.

CSA Matter Certified

Certificate: CSA24363MAT43542-24

Matter 1.2 certificate

Its certificate, CSA24363MAT43542-24, is for Matter 1.2, certified Jun 23, 2024. The Matter version is the specification version on the certificate's ledger record.

Source: CSA Distributed Compliance Ledger, read Nov 10, 2026.

What Matter 1.2 added, and which devices use it →

Certified software versions

The CSA ledger lists 3 certified software versions for the device on certificate CSA24363MAT43542-24. The most recent is software 2.4, certified Sep 23, 2026, for Matter 1.5.1. The certificate this page shows covers software 2.1, certified Jun 23, 2024, for Matter 1.2.

Software 2.4 · certified Sep 23, 2026 · Matter 1.5.1 · CSA264ZBMAT55863-24
Software 2.3 · certified Oct 14, 2025 · Matter 1.4 · CSA25B51MAT47779-24
Software 2.1 · certified Jun 23, 2024 · Matter 1.2 · CSA24363MAT43542-24 · this page's certificate

Certification covers each software version listed. It does not establish the software on a unit you buy.

Source: CSA Distributed Compliance Ledger, device record (vendor ID 24582, product ID 13), read Nov 10, 2026.

A thermostat with learning schedules and a separate room-temperature sensor. Google’s compatibility checker is the starting point for your system, including multi-stage equipment and any power accessories. Compatible 24 V HVAC · C-wire needs vary. Check the exact HVAC system with Google. This model can work without a C wire in many installations; some need a C wire or Nest Power Connector. The linked offer is Polished Silver with a 2nd-gen sensor. Obsidian and Gold are different finishes; the 2020 Nest Thermostat and earlier Learning generations are different products.

Wi-FiMatter

Specifications

Brand: Google
Category: Thermostats
Protocols: Wi-Fi, Matter
Certificate ID: CSA24363MAT43542-24
Certified: Jun 23, 2024
Model: GA05551-US
Firmware: 2.1

Ecosystem compatibility

Matter

Apple HomeUnverified

AlexaUnverified

Google Home

Checked platforms are named on the maker’s own site. Unverified: listed in its catalog record, not confirmed by the maker; check exact controller support.

Quick answers

Is the Nest Learning Thermostat (4th gen) Matter certified?: Yes. MatterCatalog matches it to CSA Matter certificate CSA24363MAT43542-24, certified Jun 23, 2024.
Does the Nest Learning Thermostat (4th gen) work with Apple Home or HomeKit?: Likely. It is Matter certified (certificate CSA24363MAT43542-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Apple Home on a page we hold. Apple says an iPhone using iOS 18 or later can add Matter accessories to the Home app without a home hub. Apple’s Matter page lists thermostats among the accessory types the Home app supports.
Does the Nest Learning Thermostat (4th gen) work with Google Home?: Yes. The maker’s own site names Google Home, and it is Matter certified (certificate CSA24363MAT43542-24). Google says you need a Matter-enabled hub device set up on your home wireless network before you can add Matter devices to Google Home. Google’s supported-device-types page lists the Thermostat type.
Does the Nest Learning Thermostat (4th gen) work with Alexa?: Likely. It is Matter certified (certificate CSA24363MAT43542-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Alexa on a page we hold. Alexa needs a Matter-compatible Echo; Amazon says its Echo devices support “a subset of Matter 1.5 and lower device types”, so check that yours does.
Does the Nest Learning Thermostat (4th gen) work with Samsung SmartThings?: Likely. It is Matter certified (certificate CSA24363MAT43542-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named SmartThings on a page we hold. SmartThings adds Matter devices through the SmartThings app and a Matter controller.
Does the Nest Learning Thermostat (4th gen) work with Home Assistant?: Likely. It is Matter certified (certificate CSA24363MAT43542-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Home Assistant on a page we hold. Home Assistant says: “Adding a new Matter device only works in the Home Assistant Companion app.”
Does the Nest Learning Thermostat (4th gen) use Thread or Wi-Fi?: Wi-Fi. Its catalog record lists Wi-Fi, so it joins your Wi-Fi network and does not need a Thread border router. You still need your platform’s Matter controller.
Does the Nest Learning Thermostat (4th gen) need a hub or a Thread border router?: No hub of its own and no Thread border router: it joins your Wi-Fi network. You still need your platform’s Matter controller (a smart speaker, display, streaming box or hub), though Apple says an iPhone using iOS 18 or later can add Matter accessories without a home hub.
When was the Nest Learning Thermostat (4th gen) Matter certified?: The CSA certified it on Jun 23, 2024 (certificate CSA24363MAT43542-24). That is its certification date, not a retail release date, which MatterCatalog does not state.
Where can I buy the Nest Learning Thermostat (4th gen)?: MatterCatalog has verified store links for it at Amazon, The Home Depot, Lowe's, Abt Electronics and Electronic Express. Check the current price, model and pack size at the store.

From this product’s catalog record, not hands-on testing. Editorial policy

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Google GA05551-US

· CSA certified · New · Silver finish · Nest Learning Thermostat (4th gen) + Temperature Sensor

Check price at Amazon See 3 stores