Claude is good at assembling blocks, but still falls apart at creating them

(approachwithalacrity.com)

60 points | by bblcla a day ago ago

38 comments

  • maxilevi an hour ago ago

    LLMs are just really good search. Ask it to create something and it's searching within the pretrained weights. Ask it to find something and it's semantically searching within your codebase. Ask it to modify something and it will do both. Once you understand its just search, you can get really good results.

    • bhadass an hour ago ago

      better mental model: it's a lossy compression of human knowledge that can decompress and recombine in novel (sometimes useful, sometimes sloppy) ways.

      classical search simply retrieves, llms can synthesize as well.

      • RhythmFox an hour ago ago

        This isn't strictly better to me. It captures some intuitions about how a neural network ends up encoding its inputs over time in a 'lossy' way (doesn't store previous input states in an explicit form). Maybe saying 'probabilistic compression/decompression' makes it a bit more accurate? I do not really think it connects to your 'synthesize' claim at the very end to call it compression/decompression, but I am curious if you had a specific reason to use the term.

      • andrei_says_ an hour ago ago

        “Novel” to the person who has not consumed the training data. Otherwise, just training data combined in highly probable ways.

        Not quite autocomplete but not intelligence either.

        • soulofmischief 43 minutes ago ago

          Citation needed that grokked capabilities in a sufficiently advanced model cannot combinatorially lead to contextually novel output distributions, especially with a skilled guiding hand.

          • arcanemachiner 13 minutes ago ago

            Pretty sure burden of proof is on you, here.

            • soulofmischief 6 minutes ago ago

              It's not, because I haven't ruled out the possibility. I could share anecdata about how my discussions with LLMs have led to novel insights, but it's not necessary. I'm keeping my mind open, but you're asserting an unproven claim that is not currently agreed-upon consensus by the community. Therefore, the burden of proof is on you.

    • johnisgood an hour ago ago

      Calling it "just search" is like calling a compiler "just string manipulation". Not false, but aggressively missing the point.

      • maxilevi 22 minutes ago ago

        I don't mean search in the reductionist way but rather that its much better at translating, finding and mapping concepts if everything is provided vs creating from scratch. If it could truly think it would be able to bootstrap creations from basic principles like we do, but it really can't. Doesn't mean its not a great powerful tool.

      • oliverbennett 30 minutes ago ago

        It feels like defining LLMs by what they're good at. Which also includes things like summarisation and grouping things.

      • emp17344 an hour ago ago

        No, “just search” is correct. Boosters desperately want it to be something more, but it really is just a tool.

        • johnisgood an hour ago ago

          Yes, it is a tool. No, it is not "just search".

          Is your CPU running arbitrary code "just search over transistor states"?

          Calling LLMs "just search" is the kind of reductive take that sounds clever while explaining nothing. By that logic, your brain is "just electrochemical gradients".

          • jvanderbot an hour ago ago

            What would you add?

            To me it's "search" like a missile does "flight". It's got a target and a closed loop guidance, and is mostly fire and forget (for search). At that, it excels.

            I think the closed loop+great summary is the key to all the magic.

            • soulofmischief 40 minutes ago ago

              It's a prediction algorithm that walks a high-dimensional manifold, in that sense all application of knowledge it just "search", so yes, you're fundamentally correct but still fundamentally wrong since you think this foundational truth is the end and beginning of what LLMs do, and thus your mental model does not adequately describe what these tools are capable of.

              • jvanderbot 18 minutes ago ago

                Me? My mental model? I gave an analogy for Claude not a explanation for LLMs.

                But you know what? I was mentally thinking of both deep think / research and Claude code, both of which are literally closed loop. I see this is slightly off topic b/c others are talking about the LLM only.

                • soulofmischief 7 minutes ago ago

                  Sorry, I should have said "analogy" and not "mental model", that was presumptuous. Maybe I also should have replied to the GP comment instead.

                  Anyway, since we're here, I personally think giving LLMs agency helps unlock this latent knowledge, as it provides the agent more mobility when walking the manifold. It has a better chance at avoiding or leaving local minima/maxima, among other things. So I don't know if agentic loops are entirely off-topic when discussing the latent power of LLMs.

            • bitwize 44 minutes ago ago

              Which is kind of funny because my standard quip is that AI research, beginning in the 1950s/1960s, and indeed much of late 20th century computer tech especially along the Boston/SV axis, was funded by the government so that "the missile could know where it is". The DoD wanted smarter ICBMs that could autonomously identify and steer toward enemy targets, and smarter defense networks that could discern a genuine missile strike from, say, 99 red balloons going by.

          • RhythmFox an hour ago ago

            I mean, actually not a bad metaphor, but it does depend on the software you are running as to how much of a 'search' you could say the CPU is doing among its transistor states. If you are running an LLM then the metaphor seems very apt indeed.

  • simonw 22 minutes ago ago

    I'm not entirely convinced by the anecdote here where Claude wrote "bad" React code:

    > But in context, this was obviously insane. I knew that key and id came from the same upstream source. So the correct solution was to have the upstream source also pass id to the code that had key, to let it do a fast lookup.

    I've seen Claude make mistakes like that too, but then the moment you say "you can modify the calling code as well" or even ask "any way we could do this better?" it suggests the optimal solution.

    My guess is that Claude is trained to bias towards making minimal edits to solve problems. This is a desirable property, because six months ago a common complaint about LLMs is that you'd ask for a small change and they would rewrite dozens of additional lines of code.

    I expect that adding a CLAUDE.md rule saying "always look for more efficient implementations that might involve larger changes and propose those to the user for their confirmation if appropriate" might solve the author's complaint here.

    • bblcla 15 minutes ago ago

      (Author here)

      > I'm not entirely convinced by the anecdote here where Claude wrote "bad" React code

      Yeah, that's fair - a friend of mine also called this out on Twitter (https://x.com/konstiwohlwend/status/2010799158261936281) and I went into more technical detail about the specific problem there.

      > I've seen Claude make mistakes like that too, but then the moment you say "you can modify the calling code as well" or even ask "any way we could do this better?" it suggests the optimal solution.

      I agree, but I think I'm less optimistic than you that Claude will be able to catch its own mistakes in the future. On the other hand, I can definitely see how a ~more intelligent model might be able to catch mistakes on a larger and larger scale.

      > I expect that adding a CLAUDE.md rule saying "always look for more efficient implementations that might involve larger changes and propose those to the user for their confirmation if appropriate" might solve the author's complaint here.

      I'm not sure about this! There are a few things Claude does that seem unfixable even by updating CLAUDE.md.

      Some other footguns I keep seeing in Python and constantly have to fix despite CLAUDE.md instructions are:

      - writing lots of nested if clauses instead of writing simple functions by returning early

      - putting imports in functions instead of at the top-level

      - swallowing exceptions instead of raising (constantly a huge problem)

      These are small, but I think it's informative of what the models can do that even Opus 4.5 still fails at these simple tasks.

    • Kuinox 14 minutes ago ago

      > My guess is that Claude is trained to bias towards making minimal edits to solve problems.

      I don't have the same feeling. I find that claude tends to produce wayyyyy too much code to solve a problem, compared to other LLMs.

    • joshribakoff 15 minutes ago ago

      I expect that adding instructions that attempt to undo training produces worse results than not including the overbroad generalization in the training in the first place. I think the author isn’t making a complaint they’re documenting a tradeoff.

    • AIorNot 14 minutes ago ago

      Well yes but the wider point is that it takes new Human skills to manage them - like a pair of horses so to speak under your bridle

      When it comes down to it these AI tools are like going to power tools or machines from the artisanal era

      - like going from surgical knife to a machine gun- so they operate at a faster pace without comprehending like humans - and without allowing humans time to comprehend all side effects and massive assumptions they make on every run in their context window

      humans have to adapt to managing them correctly and at the right scale to be effective and that becomes something you learn

  • michalsustr an hour ago ago

    This article resonates exactly how I think about it as well. For example, at minfx.ai (a Neptune/wandb alternative), we cache time series that can contain millions of floats for fast access. Any engineer worth their title would never make a copy of these and would pass around pointers for access. Opus, when stuck in a place where passing the pointer was a bit more difficult (due to async and Rust lifetimes), would just make the copy, rather than rearchitect or at least stop and notify user. Many such examples of ‘lazy’ and thus bad design.

  • mikece a day ago ago

    In my experience Claude is like a "good junior developer" -- can do some things really well, FUBARS other things, but on the whole something to which tasks can be delegated if things are well explained. If/when it gets to the ability level of a mid-level engineer it will be revolutionary. Typically a mid-level engineer can be relied upon to do the right thing with no/minimal oversight, can figure out incomplete instructions, and deliver quality results (and even train up the juniors on some things). At that point the only reason to have human junior engineers is so they can learn their way up the ladder to being an architect and responsible coordinating swarms of Claude Agents to develop whole applications and complete complex tasks and initiatives.

    Beyond that what can Claude do... analyze the business and market as a whole and decide on product features, industry inefficiencies, gap analysis, and then define projects to address those and coordinate fleets of agents to change or even radically pivot an entire business?

    I don't think we'll get to the point where all you have is a CEO and a massive Claude account but it's not completely science fiction the more I think about it.

    • alfalfasprout 2 hours ago ago

      > I don't think we'll get to the point where all you have is a CEO and a massive Claude account but it's not completely science fiction the more I think about it.

      At that point, why do you even need the CEO?

      • arjie 2 hours ago ago

        Reminds me of an old joke[0]:

        > The factory of the future will have only two employees, a man and a dog. The man will be there to feed the dog. The dog will be there to keep the man from touching the equipment.

        But really, the reason is that people like Pieter Levels do exist: masters at product vision and marketing. He also happens to be a proficient programmer, but there are probably other versions of him which are not programmers who will find the bar to product easier to meet now.

        0: https://quoteinvestigator.com/2022/01/30/future-factory/

        • MrDunham an hour ago ago

          My technical cofounder reminds me of this story on a weekly basis.

      • jerf 30 minutes ago ago

        You will need the CEO to watch over the AI and ensure that the interests of the company are being pursued and not the interests of the owners of the AI.

        That's probably the biggest threat to the long-term success of the AI industry; the inevitable pull towards encroaching more and more of their own interests into the AI themselves, driven by that Harvard Business School mentality we're all so familiar with, trying to "capture" more and more of the value being generated and leaving less and less for their customers, until their customer's full time job is ensuring the AIs are actually generating some value for them and not just the AI owner.

      • pixelready an hour ago ago

        The board (in theory) represents the interests of investors, and even with all of the other duties of a CEO stripped away, they will want a ringable neck / PR mouthpiece / fall guy for strategic missteps or publicly unpopular moves by the company. The managerial equivalent of having your hands on the driving wheel of a self-driving car.

      • ako 2 hours ago ago

        And who does he sell his software to? Companies that have only 1 employee, don’t need a lot of user licenses for their employees…

        • AshamedCaptain an hour ago ago

          What would be the point of selling software in such a world ? (where anyone could build any piece of software with a handful of keystrokes)

      • mettamage an hour ago ago

        All of us are a CEO by that point.

      • ceejayoz 2 hours ago ago

        As Steinbeck is often slightly misquoted:

        > Socialism never took root in America because the poor see themselves not as an exploited proletariat, but as temporarily embarrassed millionaires.

        Same deal here, but everyone imagines themselves as the billionaire CEO in charge of the perfectly compliant and effective AI.

      • tiku an hour ago ago

        For the network.

  • mklyachman 39 minutes ago ago

    Wow, what an excellent blog. Highly suggest trying out creator's tool (stardrift.ai) too!