this post was submitted on 15 Aug 2025
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The University of Rhode Island's AI lab estimates that GPT-5 averages just over 18 Wh per query, so putting all of ChatGPT's reported 2.5 billion requests a day through the model could see energy usage as high as 45 GWh.

A daily energy use of 45 GWh is enormous. A typical modern nuclear power plant produces between 1 and 1.6 GW of electricity per reactor per hour, so data centers running OpenAI's GPT-5 at 18 Wh per query could require the power equivalent of two to three nuclear power reactors, an amount that could be enough to power a small country.

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[–] jsomae@lemmy.ml 6 points 1 hour ago* (last edited 1 hour ago)

For reference, this is roughly equivalent to playing a PS5 game for 4 minutes (based on their estimate) to 10 minutes (their upper bound)

calulationsource https://www.ecoenergygeek.com/ps5-power-consumption/

Typical PS5 usage: 200 W

TV: 27 W - 134 W → call it 60 W

URI's estimate: 18 Wh / 260 W → 4 minutes

URI's upper bound: 48 Wh / 260 W →10 minutes

[–] plyth@feddit.org 2 points 1 hour ago* (last edited 1 hour ago)

That are 25 request per kWh. At 10 to 25cents per kWh that's 1cent per request. That doesn't seem to be too expensive.

[–] Deflated0ne@lemmy.world 18 points 14 hours ago (3 children)

And an LLM that you could run local on a flash drive will do most of what it can do.

[–] EncryptKeeper@lemmy.world 5 points 2 hours ago

I mean no not at all, but local LLMs are a less energy reckless way to use AI

[–] ckmnstr@lemmy.world 5 points 13 hours ago

Probably not a flash drive but you can get decent mileage out of 7b models that run on any old laptop for tasks like text generation, shortening or summarizing.

[–] Tikiporch@lemmy.world 2 points 14 hours ago (1 children)

What do you use your usb drive llm for?

Porn. Obviously.

[–] sp3ctr4l@lemmy.dbzer0.com 27 points 18 hours ago

Fucking Doc Brown could power a goddamn time machine with this many jiggawatts, fuck I hate being stuck in this timeline.

[–] RememberTheApollo_@lemmy.world 5 points 13 hours ago (1 children)

Help me out here. What designates the “response” type? Someone asking it to make a picture? Write a 20 page paper? Code a small app?

[–] ckmnstr@lemmy.world 1 points 13 hours ago (1 children)

Response Type is decided by ChatGPTs new routing function based on your input. So yeah. Asking it to "think long and hard", which I have seen people advocating for to get better results recently, will trigger the thinking model and waste more resources.

[–] towerful@programming.dev 5 points 12 hours ago (1 children)

So instead of just saying "thank you" I now have to say "think long and hard about how much this means to me"?

[–] ckmnstr@lemmy.world 2 points 5 hours ago

If you want it to really use a lot of energy on receiving your gratitude, sure I guess^^

[–] TheGrandNagus@lemmy.world 99 points 1 day ago* (last edited 1 day ago) (1 children)

I have an extreme dislike for OpenAI, Altman, and people like him, but the reasoning behind this article is just stuff some guy has pulled from his backside. There's no facts here, it's just "I believe XYX" with nothing to back it up.

We don't need to make up nonsense about the LLM bubble. There's plenty of valid enough criticisms as is.

By circulating a dumb figure like this, all you're doing is granting OpenAI the power to come out and say "actually, it only uses X amount of power. We're so great!", where X is a figure that on its own would seem bad, but compared to this inflated figure sounds great. Don't hand these shitty companies a marketing win.

Thats actyally a fav rhetorical trick of mine when arhuing with consummatw bullshitters who have followers.

[–] A_norny_mousse@feddit.org 115 points 1 day ago (5 children)

I don't care how rough the estimate is, LLMs are using insane amounts of power, and the message I'm getting here is that the newest incarnation uses even more.

BTW a lot of it seems to be just inefficient coding as Deepseek has shown.

[–] ThePinkUnicorn@lemdro.id 2 points 2 hours ago* (last edited 2 hours ago) (1 children)

For training yes, but during operation by this studies measure Deepseek actually has an even higher power draw, according to the article. Even models with more efficient programming use insane amounts of electricity

This was higher than all other tested models, except for OpenAI's o3 (25.35 Wh) and Deepseek's R1 (20.90 Wh).

[–] A_norny_mousse@feddit.org 1 points 13 minutes ago

OK I guess I didn't read far enough but your quote says that Deepseek uses less than Open AI?

[–] kautau@lemmy.world 18 points 22 hours ago* (last edited 21 hours ago) (1 children)

And water usage which will also increase as fires increase and people have trouble getting access to clean water

https://techhq.com/news/ai-water-footprint-suggests-that-large-language-models-are-thirsty/

[–] FauxLiving@lemmy.world 8 points 19 hours ago (4 children)

It would only take one regulation to fix that:

Datacenters that use liquid cooling must use closed loop systems.

The reason they dont, and why they setup in the desert, is because water is incredibly cheap and energy to cool a closed loop system is expensive. So they use evaporative open loop systems.

[–] Jason2357@lemmy.ca 3 points 6 hours ago

Closed loop systems require a large heat sync, like a cold water lake, limiting them to locations that are not as tax advantageous as dry red states.

[–] kautau@lemmy.world 7 points 19 hours ago (1 children)

Unfortunately I wonder if it’s more expensive to set up a closed loop system that’s really expensive or to buy lawmakers that will vote against bills saying you should do so and it’s a tale old as time

[–] FauxLiving@lemmy.world 6 points 19 hours ago (1 children)
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[–] ThePowerOfGeek@lemmy.world 42 points 1 day ago (4 children)

BTW a lot of it seems to be just inefficient coding as Deepseek has shown.

Kind of? Inefficient coding is definitely a part of it. But a large part is also just the iterative nature of how these algorithms operate. We might be able to improve that via code optimization a little bit. But without radically changing how these engines operates it won't make a big difference.

The scope of the data being used and trained on is probably a bigger issue. Which is why there's been a push by some to move from LLMs to SLMs. We don't need the model to be cluttered with information on geology, ancient history, cooking, software development, sports trivia, etc if it's only going to be used for looking up stuff on music and musicians.

But either way, there's a big 'diminishing returns' factor to this right now that isn't being appreciated. Typical human nature: give me that tiny boost in performance regardless of the cost, because I don't have to deal with. It's the same short-sighted shit that got us into this looming environmental crisis.

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[–] yesman@lemmy.world 40 points 1 day ago (13 children)

I think AI power usage has an upside. No amount of hype can pay the light bill.

AI is either going to be the most valuable tech in history, or it's going to be a giant pile of ash that used to be VC capital.

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[–] Dasus@lemmy.world 7 points 19 hours ago (8 children)

that's a lot. remember to add "-noai" to your google searches.

[–] Opisek@lemmy.world 1 points 1 hour ago

This is my weekly time to tell lemmings about Kagi, the search engine that does not shove LLM in your face (but still let's you use it when you explicitly want it) and that you pay for with your money, not your data.

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[–] stevedice@sh.itjust.works 2 points 14 hours ago

The team measured GPT-5’s power consumption by combining two key factors: how long the model took to respond to a given request, and the estimated average power draw of the hardware [they believe is] running it.

[–] eager_eagle@lemmy.world 32 points 1 day ago (2 children)

Bit of a clickbait. We can't really say it without more info.

But it's important to point out that the lab's test methodology is far from ideal.

The team measured GPT-5’s power consumption by combining two key factors: how long the model took to respond to a given request, and the estimated average power draw of the hardware running it.

What we do know is that the price went down. So this could be a strong indication the model is, in fact, more energy efficient. At least a stronger indicator than response time.

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