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Show HN: Run an 80B Qwen in 4.3 GB of RAM on a Mac, and a 35B on an iPhone

310 points · 140 comments · leonickson

  1. dghlsakjg · · focus · HN ↗
    I know everyone wants to crap all over these setups that are impractical, but this is how progress happens.

    People will keep plugging away at this and figure out how to avoid wearing the hard drive, how to make it run faster, custom hardware buses etc.

    Keep going! I personally can't wait for the day when a 1t param model runs off a $200 SSD instead of a $50k rack of Nvidia chips.

    1. gpt5 · · focus · HN ↗
      Most people are already used to rely on the internet on basically everything. At best, they download a tiny chunk of entertainment from it when they go on a plane, and as soon as they land they immediately abandon that offline chunk.

      In addition, LLMs, small or large, are highly parallelizable. This means that running on the same machine/GPUs many requests in parallel is significantly more efficient, and the sum of tok/s will far outweight any single user use case.

      Those two combined means that unless LLMs reach the state of 'good enough' (TBD), I fully expect the economics and people's interest to align with 99%+ of LLM usage would be in centralized servers. (not dismissing the fact that there are use cases for local LLMs, and that the progress matters).

      1. anon373839 · · focus · HN ↗
        I suspect the economics favor centralized servers, if you only look at the aggregated cost to serve X number of users' tokens. But we could say the same thing about a lot of the computation that iPhones do locally. They could have been much thinner clients, but instead they now have more compute power than desktops had when iPhones launched.
        1. gpt5 · · focus · HN ↗
          iPhone are in practice more reliant on central servers than ever before. Except for some games, if you take a random person's iPhone it becomes almost useless without internet connection. Which is exactly my point, it's not about compute, it's about people's expecations and priorities. The main driver of the need for higher performance chips on iPhones is its camera and smooth 120fps UI animations, not local processing for apps for almost all people.

          However, the compute situation just skew it even further when it comes to LLMs.

          1. anon373839 · · focus · HN ↗
            Phones are communication devices. So I would always expect connectivity to be central to their use. But that's a different issue than the "inefficiency" of edge computation and whether powerful edge devices can sell (they obviously can).
        2. xyzsparetimexyz · · focus · HN ↗
          A lot of the compute that iPhones do either has high bandwidth requirements (photo editing etc) or low latency requirements (games etc). LLMs are an interesting case where unless you're feeding in images, it's just text
        3. zozbot234 · · focus · HN ↗
          > I suspect the economics favor centralized servers, if you only look at the aggregated cost to serve X number of users' tokens.

          The economics of real-time, low-latency inference of very large near-SOTA models will heavily favor a centralized setup. But if you can afford to wait for your answer - be it a day, a week, or even more at the extreme low end (or if you just stick to leaner models for your relatively quick replies) the economics start to shift in a very clear way. A slow-going local inference setup relying on cheap SSD offload does not need the high power input of a datacenter rack, and the cooling load is outright trivial - even when working on many requests in parallel, which (in a SSD offload context) is what maximizes throughput even for local inference. These are serious problems for centralized inference that will probably limit the scale at which it can be applied.

        4. dghlsakjg · · focus · HN ↗
          iPhone, at this very moment, ships with an llm that third party developers can use. People are already using local llms.
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