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frabonifaceyesterday at 7:11 PM9 repliesview on HN

I hadn't seen the token/Joules comparison with human speech before. Humans are still 22x more efficient, which is not that far considering the rate of progress in this area.


Replies

Phemistyesterday at 7:49 PM

The 20W number includes EVERYTHING else the brain does. The chips/models are literally only producing tokens. Let's see an LLM drive a robot harness and have the robot produce speech, as well as move through 3D space, keep track of metabolic needs, etc. etc. etc. before we compare efficiencies. That is even assuming the tokens are of equal quality. This comparison is currently Apples and Oranges.

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DoctorOetkeryesterday at 9:15 PM

I couldn't source the parameters from the screenshot or the nearby graphs, but from the nearby graphs you can see that at concurrency C=1, tokens/Joule (vertical axis) has totally plummeted, and obviously concurrent inference is much more efficient by batching. Divide the memory by the bandwidth and thats how long it takes to dump the full RAM contents through the chip. Do you want to do this once per token for a single conversation, or do you want to progress multiple conversations if you're going through all the weights anyway? The peak in the graphs is easily 22x more efficient than the low bottom right part on the graphs. So in batched mode its already more efficient than human speech.

nojsyesterday at 11:09 PM

> Humans are still 22x more efficient, which is not that far considering the rate of progress in this area.

Based on a human output rate of 3.3 tok/s, which seems questionable as a means of comparison

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jstummbilligyesterday at 9:22 PM

At just inference! Which both a human and a model can not do without training, but while training rounds to zero for the model, for humans it scales linearly.

I am relatively certain we have already squarely been beaten in net efficiency at scale.

plasticchrisyesterday at 7:41 PM

Probably not when you consider the training cost and upkeep expenses, not to mention the depreciation…

walrus01today at 1:14 AM

Fairly amazing when you think about it, like human intellect can run on a bowl of rice and a chicken yakitori skewer.

kemilleryesterday at 8:24 PM

I wonder how that stacks up if you consider all the time you have to keep the body alive when it’s not actively producing “tokens”.

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saagarjhayesterday at 10:26 PM

You’re missing the factor for intelligence/token.

danishanishyesterday at 7:37 PM

I mean, surely when quality is accounted for the difference is significantly higher

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