4 AI models · 17 ranked · updated aug 10, 2026
Best Smart Thermostats, according to AI (2026).
Ecobee Smart Thermostat Premium is the answer at the latest close: the consensus #1 at a score of 50 across all 4 models.
This guide is built from the recorded answers of ChatGPT, Claude, Gemini, Perplexity to the real questions buyers ask about smart thermostats. We logged 1,190 of them this period, covering 17 tools. We report what the models said, in the order they said it. Nobody paid to be here, and we don't add opinions of our own.
Prefer the raw board? See the full model-by-model ranking. Every rank, every score, every close.
The ranked list
Ecobee Smart Thermostat Premium holds the consensus #1 at a score of 50, with Gemini and Perplexity placing it first outright.
It entered the ranking at the latest close. A new name in the models' answers.
ecobee Smart Thermostat Premium — Best premium choice for a larger or more comfort-sensitive home because it adds ecobee’s strongest package of occupancy-based savings, time-of-use shifting, humidity-aware control, air-quality monitoring, and smart-home features.
ChatGPT, this closeRanked from strongest to more niche picks: 1. ecobee Smart Thermostat Premium – My top pick for most homes; it ships with a SmartSensor for room-level occupancy/temperature detection, has built-in air quality monitoring, and works natively with Alexa, Google Home, and HomeKit without extra hubs, which translates into r…
Claude, this closeGoogle Nest Thermostat ranks #2 on consensus with a score of 26, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #6 on Gemini, a spread of 5.
It entered the ranking at the latest close. A new name in the models' answers.
Google Nest Thermostat — Best lower-cost Google/Home-Matter option because it provides ENERGY STAR-certified scheduling, away setbacks, energy-use tracking, and broad 24V compatibility for considerably less than the Learning model, though it lacks remote-sensor support and automatic schedule learning.
ChatGPT, this closeGoogle Nest Thermostat (standard, non-Learning) – A budget-friendlier Nest that still integrates seamlessly with Google/Alexa ecosystems and covers most standard HVAC setups, though you give up the learning algorithm and built-in room sensor of the pricier Nest.
Claude, this closeAmazon Smart Thermostat ranks #3 on consensus with a score of 23, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #7 on Perplexity, a spread of 6.
It entered the ranking at the latest close. A new name in the models' answers.
Amazon Smart Thermostat — Best inexpensive pick for an Alexa-first home with a C-wire because it is ENERGY STAR certified and includes time-of-day scheduling, geofencing, humidity sensing, and utility demand-response capability, but it is less compelling if you want sensors, advanced controls, or ecosystem flexibility.
ChatGPT, this closeAmazon Smart Thermostat – The best entry point for tight budgets (~$80) that's still ENERGY STAR certified and delivers certified savings, but it's limited to single-stage systems and lacks the multi-room sensing of pricier models.
Claude, this closeGoogle Nest Learning Thermostat ranks #4 on consensus with a score of 21, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Perplexity, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
It is the most contested name in this category. It carries the widest cross-model disagreement on the board.
Google Nest Learning Thermostat (4th gen) — Best for hands-off automation and broad HVAC compatibility because it learns a schedule, includes a temperature sensor, uses adaptive away/eco behavior, works with most 24V systems, and does not need a C-wire in most homes.
ChatGPT, this closeGoogle Nest Learning Thermostat (4th Gen) – The best choice if you want a "set it and forget it" experience; its AI-driven learning algorithm adapts to your schedule and outdoor conditions automatically, and it now supports Matter/Thread for future-proof smart home integration.
Claude, this closeGemini#2compare head-to-headGoogle Nest Learning Thermostat (4th Gen) ranks #5 on consensus with a score of 21, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Gemini, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Google Nest Learning Thermostat (4th gen) — Best for hands-off automation and broad HVAC compatibility because it learns a schedule, includes a temperature sensor, uses adaptive away/eco behavior, works with most 24V systems, and does not need a C-wire in most homes.
ChatGPT, this closeGoogle Nest Learning Thermostat (4th Gen) – The best choice if you want a "set it and forget it" experience; its AI-driven learning algorithm adapts to your schedule and outdoor conditions automatically, and it now supports Matter/Thread for future-proof smart home integration.
Claude, this closePPLX#2compare head-to-headEcobee Smart Thermostat Enhanced ranks #6 on consensus with a score of 18, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Perplexity, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
For a typical U.S. home with a 24‑volt central HVAC system, my genuine top pick is the ecobee Smart Thermostat Enhanced: it combines strong automated savings features with room-sensor support and costs less than the flagship models.
ChatGPT, this closeecobee Smart Thermostat Enhanced – A slightly cheaper sibling to the Premium that keeps the SmartSensor and multi-platform compatibility but drops the air-quality extras, making it a strong value pick for room-by-room comfort without paying for features you may not need.
Claude, this closeGemini#3compare head-to-headEcobee Smart Thermostat Essential ranks #7 on consensus with a score of 18, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Gemini, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Ecobee Smart Thermostat Essential — A strong value choice for energy savings because it keeps Ecobee’s core occupancy-based automation approach while being positioned as a simpler, lower-cost option.
Perplexity, this closePPLX#3compare head-to-headHoneywell Home T9 WiFi Smart Thermostat ranks #8 on consensus with a score of 15, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Perplexity, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Honeywell Home T9 WiFi Smart Thermostat: Its excellent remote room sensors allow for highly targeted heating and cooling, preventing energy waste in unoccupied rooms.
Gemini, this closeGemini#4compare head-to-headHoneywell Home T9 Smart Thermostat ranks #9 on consensus with a score of 13, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Gemini, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Honeywell Home T9 Smart Thermostat with Smart Room Sensor — Best if your priority is fixing hot and cold rooms because its sensors let you prioritize the rooms you actually occupy, and the thermostat is ENERGY STAR certified.
ChatGPT, this closeHoneywell Home T9 Smart Thermostat — A solid alternative for multi-room comfort and savings, especially if you care about room sensors and broad HVAC compatibility.
Perplexity, this closePPLX#5compare head-to-headHoneywell Home T10 Pro Smart Thermostat ranks #10 on consensus with a score of 11, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Gemini, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Honeywell Home T10 Pro Smart Thermostat — Better suited for more complex homes and systems, making it a practical pick when installation flexibility matters as much as savings.
Perplexity, this closePPLX#6compare head-to-headWyze Thermostat ranks #11 on consensus with a score of 10, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Perplexity, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Wyze Thermostat: This is one of the most cost-effective smart thermostats on the market, offering impressive usage tracking and basic energy-saving scheduling for a fraction of the cost of premium models.
Gemini, this closeGemini#7compare head-to-headEmerson Sensi Touch 2 Smart Thermostat ranks #12 on consensus with a score of 8, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Perplexity, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Emerson Sensi Touch 2 Smart Thermostat: It features a sleek interface and smart alerts that notify you of extreme temperature and humidity changes, helping to maintain system efficiency.
Gemini, this closeGemini#8compare head-to-headSensi Touch 2 Smart Thermostat ranks #13 on consensus with a score of 8, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Gemini, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Sensi Touch 2 Smart Thermostat — Best straightforward, privacy-conscious alternative because it supports optional room and outdoor sensors, geofencing, flexible schedules and detailed usage reports, while Copeland estimates about 23% HVAC-energy savings from its smart features.
ChatGPT, this closeEmerson Sensi Touch 2 Smart Thermostat: It features a sleek interface and smart alerts that notify you of extreme temperature and humidity changes, helping to maintain system efficiency.
Gemini, this closePPLX#8compare head-to-headEmerson Sensi Smart Thermostat ranks #14 on consensus with a score of 7, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Gemini, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Emerson Sensi Smart Thermostat — A reasonable basic smart thermostat for simple energy management, but it is typically a lighter recommendation for AI-style optimization.
Perplexity, this closePPLX#9compare head-to-headEmerson Sensi Wi-Fi Smart Thermostat ranks #15 on consensus with a score of 7, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Perplexity, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Emerson Sensi Wi-Fi Smart Thermostat: This classic model features a traditional design but includes robust app-based scheduling and geofencing to help reduce unnecessary HVAC usage.
Gemini, this closeGemini#9compare head-to-headGoogle Nest Learning Thermostat (3rd Gen) ranks #16 on consensus with a score of 6, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Gemini, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Google Nest Learning Thermostat (3rd Gen) — Still viable if found at a discount, but it is weaker than the 4th-gen model for a buyer focused on getting the best current energy-saving recommendation.
Perplexity, this closePPLX#10compare head-to-headMysa Smart Thermostat ranks #17 on consensus with a score of 6, scoring best on ChatGPT (#1).
The models disagree about it more than most: #1 on ChatGPT but #11 on Perplexity, a spread of 10.
It entered the ranking at the latest close. A new name in the models' answers.
Mysa Smart Thermostat V2 for Electric Baseboard Heaters — Best choice if your home has 120/240V electric baseboard, convector, or fan-forced heat rather than central HVAC because it is designed specifically for line-voltage electric heat and adds zoned schedules, geofencing, energy charts, and smart-home control.
ChatGPT, this closeMysa Smart Thermostat: Specifically designed for high-voltage electric baseboard heating, it fills a crucial niche for homes needing energy-saving features for zoned electric heat.
Gemini, this closeGemini#10compare head-to-head
Questions people ask.
What is the best smart thermostats according to AI?
Ecobee Smart Thermostat Premium holds the consensus #1 at the latest close with a score of 50 out of 100, ahead of Google Nest Thermostat. The models don't fully agree: 1 different brand is crowned #1 across the four models.
Which smart thermostat does ChatGPT recommend first?
ChatGPT's current #1 for smart thermostats is shown in the model column of the full ranking.
Which smart thermostat does Claude recommend first?
Claude's current #1 for smart thermostats is shown in the model column of the full ranking.
How are these rankings measured?
We ask each model the same buying questions on every run (1,190 queries this period), record the full answers, and score each named brand 0-100 by how early and how consistently it appears. Every question runs through the official model APIs, with web search on, not through the consumer chat apps, so nothing is personalized to a user. Each model is scored independently; the consensus blends all 4.
Do the AI models agree with each other?
At the top, yes. Every model crowns the same #1 at the latest close. Further down the board they diverge, which is why each brand carries a spread figure: the gap between its best and worst model rank.
This is the guide. The record has more.
The full ranking shows every model’s column side by side, 12 weeks of movement, and the methodology behind every number.