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dgellowyesterday at 7:20 PM5 repliesview on HN

One aspect Paul Kedrosky mentioned recently is the concept of „duration mismatch“. The price per token goes down over time (either because the AI vendor reduces due to competition pressure, or because customers are now incentivized to use older cheaper models). But datacenters are financed through debt, with the assumption their revenue increases over time. Quoting him: „[AI vendors are] paying for a fixed cost with a depreciating commodity“[0].

So you have on one end the token revenue trending down, on the other end the training cost going up for the next frontier models, and you need to pay back your 10y debt.

0: https://youtu.be/wGZboZcSGDY?is=64GuKyqBh_4aSjTE


Replies

missedthecueyesterday at 9:06 PM

"So you have on one end the token revenue trending down, on the other end the training cost going up for the next frontier models, and you need to pay back your 10y debt."

Not necessarily, the bond holders could simply take a massive hair cut and lose shitloads of money. On the topic of bubbles and exuberance, Jeff Bezos made the salient point that there was a massive over-invested biotech boom in the 1990s and tons of sophisticated investors ended up losing lots of money. But humanity still kept the medical advancements made by the boom. Stocks going down didn't un-research drugs, and it won't un-research new GPUs or un-build datacenters.

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try-workingtoday at 2:43 AM

If you have a good model router, you can route to older, cheaper models that run on older hardware, for simpler tasks. That helps labs extend the economic life of their hardware investments. They will likely fight it at first though as they see it as reducing ASP.

This is why I'm building role-model, a routing protocol and a router runtime: https://role-model.dev/

geysersamyesterday at 9:37 PM

Current AI datacenter/model development investment rate is roughly 1T/year. That's a lot. But the US economy is 33T/year. So the investment pays back (roughly) over ten years if, each year, the AI investments increase overall productivity by 0.6%, assuming the AI companies can capture half of the value of that productivity gain.

> „[AI vendors are] paying for a fixed cost with a depreciating commodity“

That's just a confusing way to say you don't think future models will be worth the development costs. Because if future models are significantly better, why would the price of tokens to access those models deprecate?

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bijowo1676yesterday at 7:25 PM

do GPU chips really depreciate physically? There are no moving parts, I dont think memory chips or GPU chips deteriorate naturally.

I think its only accounting depreciation.

I have been using my laptop for a decade, what is stopping datacenters from using the purchased GPU chips for a decade?

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bethekidyouwantyesterday at 11:01 PM

Using a shittier model is just more work for the user, I’m not sure why anyone does it, unless they’re playing with it like a toy.