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The Economics of Open-Weight Inference

27 pointsby 5h agodata.ornn.com
16 comments
2h agoHN ↗

The problem, IMO, with open-weight models is that you accustom to the capabilities of frontier models too quickly; and downgrading to an open-weight "frontier minus 2" or "frontier minus 3" model is often painful, since they feel way less useful than their newer closed-weights counterpart. To be honest, I don't know any companies using OW models at a large scale for their operations (agents or chat assistants).

1h agoHN ↗

I think this is where Deepseek has nailed the mark; DS4.1 Flash is really, really fast, and really, really cheap. If you give it small, structured goals, it completes them crazy quick, at negligible cost. There's different vectors to differentiate along to stay in the conversation.

I've taken to using them as micro-review subagents at development milestones, where a "frontier - 1" model like Opus or Sol launches 10-15 of them on small review tasks that each run for ~10 minutes. Costs about $1 per cycle, and they usually catch something Astra or Fable didn't. Then the orchestrator validates each claim before passing it back to the planning session so we can fold the findings in.

1h agoHN ↗

That is true if you're using them as chatbots but for something behind a product it's largely OK as long as it meets the requirements.

9m agoHN ↗

I haven’t used open weight models yet, but this would match my intuition given I haven’t experienced a noticeable increase in code quality this calendar year. If open weight models are already on par with January frontier models that’s already enough for me to automate most of the manual parts of my work (I.e. not “architecting”).

And once frontier models can architect (turn business requirements into engineered systems) then I guess no one needs a job because that’s the digital singularity.

55m agoHN ↗

I’ve found the opposite. Going from Opus 5 to Qwen3.8 flash has been a breath of fresh air.

28m agoHN ↗

It was a breath of fresh air for me because it was nice going to a model that is "smart enough".

36m agoHN ↗

To be honest, I don't know any companies using OW models at a large scale for their operations (agents or chat assistants).

Perhaps they simply don’t advertise it and investors (currently) love companies that spend heavily on frontier models. That said, OW models, especially when combined with RAG, work quite well, and given the current state of the industry, they may be the only sensible way to keep inference costs under control.

31m agoHN ↗

For chat I can see, less so for LLM use in automation for example, there it makes much less of a difference I can imagine.

2h agoHN ↗

I think an interesting point is that hardware as of today still has no utility value after its reported lifetime has elapsed, which prevents neolabs and smaller labs from getting older HW clusters as the banks are not willing to give out loans against them. There is no agreed upon pricing for "expired" A100 clusters or similar.

This is clearly not true, and we are starting to see compute markets, but only for rental prices/H, not for the hardware itself. I feel like there is some artificial moat being built here to stimulate sales of new hardware, because an H100 at 1/16th the price will have comparable dollar/FLOP as Vera Rubin.

2h agoHN ↗

Depends on the workload. H100 will never have the network performance of Vera Rubin. There's also token per watt, newer systems will beat the older systems.

2h agoHN ↗

It's not clear how much of the latest chips have even made it on-line yet.

The claims of many GW of installed training/inference have come under scrutiny lately. The first VeraRubins aren't even there yet, so it's all GB300 NVL72s as the peak performers and probably <<1GW of those so far. Even xAI Colossus is mostly H200s and B200s.

Electricity costs are also a huge differentiator. When drawing 100kW the difference between >50cents and <10cents per kWh is pretty big! One is almost $0.5M and the other is less than $100k.

47m agoHN ↗

HW clusters as the banks are not willing to give out loans against them

Which banks have analysts that understand the difference between H100 and A100? Do you have actual experience with being denied a loan based on this or are you just making things up?

2h agoHN ↗

Then why do people still believe that OpenAI any Anthropic have negative margins

2h agoHN ↗

Dark grey text on a black background: it's like they are trying not to let anyone read their article!

19m agoHN ↗

The style and font choice here is awful. Nearly impossible to read in the daytime.