At the time, I did automated bug filing with human review. Human review found zero known false positives.
Anthropic was using a better model and had more tokens to spend, giving them the advantage on the two most difficult factors w.r.t. false positive rejection.
If you have the budget, false positive rejection is straightforward (ask agent to repro, have agents independently check if the repro is valid).
Given the false positive rate people are seeing, it seems like they didn't do this? It's very weird that they wouldn't have, though.
Were Ralph loops ever effective?
They were popular, but when I did a comparison, they underperformed vs. a normal loop with context. There were all these theories about why Ralph loops were effective but AFAICT people just didn't run the comparison?
danluu.com/pl-tokens/#ralph
ALT Ralph loops underperform in 27 out of 30 conditions
ALT In early 2025, I started seeing people turn off their brain as they use LLMs1. They would have an LLM take an action (summarize text, write some code, etc.), and just assume that it worked2. This generally didn't work in early 2025 and the result was often quite silly.
As LLMs have gotten better, I've seen more of this. Sometimes, people will try to get the LLM to write some code for them and basically just assume that it works3. Sometimes there's a human in the loop and, if the thing doesn't work, they'll ask the LLM to figure out the problem and solve it. Niklas Gruhn calls some variants of doing this being a meat proxy.4
Being a for loop meat proxy works better than it did in early 2025 and the software I've tried that's developed like this sometimes actually sort of works. Not well enough that I'd want to use it or that it's successful, but I'm impressed at how effective being a meat proxy is in September 2026. You could even imagine LLMs improving enough that brain-off meat-p...
Amazon exec: you wouldn't notice [if someone blew up a datacenter]. I mean, we might be a bit upset, but you wouldn't notice! [laughs]
Amazon after DCs blown up: After a thorough assessment, we have determined that we are unable to restore access to the resources and data ...
ALT But hold on a second: If we're concentrating all of our data into data centers, and concentrating most of the data centers in one county, doesn't that make a very tempting target for terrorists?
Amazon's Matt Wood isn't worried: "If something does happen or we have a power event or there's a flood in one specific location, that data is held redundantly in other locations as well."
Pogue asked, "I don't mean to give anyone ideas, but let's say I figured out that one of these unmarked buildings was an AWS data center, and I blew it up. Are you saying that it's so backed up and redundant that you probably wouldn't notice?"
"Yeah, you wouldn't notice. I mean, we might be a bit upset, but you wouldn't notice!" Wood laughed.
ALT AWS says wartime damage means some Middle East cloud resources are gone for good
Iranian strikes overwhelmed regional redundancy in Bahrain and left one UAE Availability Zone inaccessible
Dan Robinson
IT INFRASTRUCTURE REPORTER
25
Published Wed 16 Sept 2026 // 12:11 UTC
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Yes, more than one DC was blown up, but DCs being blown up aren't uncorrelated events.
It's well-known that disk, CPU, etc., failures are highly correlated events, and those aren't even adversarial failures!
Interesting to see Yegge say he never successfully built anything with Gas Town.
In danluu.com/ai-coding/, I mentioned not finding these ultra vibed orchestrators useful b/c reliability (w.r.t. completing tasks). Turns out the author of the most famous one had the same issue.
BTW, in danluu.com/yegge-predictions…, I said that I have a huge amount of respect for Yegge due to his insight into the future.
I still think his public predictions were really good, as were his non-public predictions from his internal writing at Google.
Pretty concrete career advice unrelated to my own career: Cloud security is a nascent field with few good solutions and lots of greenfield to invent the future. Only 20% of IT spend is in the cloud, but it will reach 80%. Getting in early will make you an expert in 5 years time.
in my head my bar for "human level" is actually "top 0.1% of humans" and i think this is more correct than human medians, in the same spirit of this classic dan luu work danluu.com/p95-skill/
but also i think it's funny that our models will probably have lsat scores worthy of top tier law schools before they qualify for aime
How accurate have Ed Zitron's AI skeptic predictions been?
danluu.com/zitron/
ALT Feb 2024: "I believe we're reaching the upper limits about what generative AI can do and how accurate its outputs can be."
Wrong4
March 2024: "Have We Reached Peak AI?"; another prediction that hallucinations mean that AI progress is limited to then-current levels
Wrong
April 2024: "As I previously warned, artificial intelligence companies are running out of data ..."; another prediction that models can't improve because there's no more data
Wrong
June 2024: OpenAI growth is stalling (with the implication it will continue to stall), which will lead to some kind of collapse of OpenAI
Wrong (it could be the case that OpenAI will collapse but, if so, it won't be due to any kind of growth stall from 2024)
July 2024: "Generative AI, as I said back in March, is peaking, if it hasn't already peaked. It cannot do much more than it is currently doing, other than doing more of it faster with some new inputs"
Wrong
July 2024: "Gen...
ALT I used to wonder why I see so many more bugs than most people. I easily observe hundreds to thousands of bugs per week and nothing seems to work, but most people I talk to don't see anything like this. For a long time, I thought this had something to do with how I use computers but, over time, I've realized that it's mostly that people are hitting the same bugs and don't notice.
If you're not a programmer, that's probably a better way to see the world, but I think curing quality/bug blindness is helpful for programmers. I've done this with a lot of friends and acquaintances (just by pointing out bugs). After a few weeks, people who are so inclined tend to start noticing bugs as well.
Because I notice these kinds of things, I've had multiple jobs where directors/VPs/execs/etc. sometimes ask me to evaluate something when they want an actual opinion from someone who is relatively likely to notice issues (and fix them or drive fixes for them if necessary). Sometimes I won't find any i...
one of the big early ideas behind tailscale was a single computer is powerful enough to solve almost every problem, and that this is not widely understood. we need fewer distributed systems and more spreadsheet implementations.
ALT The other day, I saw a viral tweet saying that people talking about how LLMs are causing slow, bloated, code are going to eat crow once they re-write everything in super-optimized assembly. We're not quite at the point where we want to write everything in assembly, but some variant of what Nolan Lawson said about testing, you can choose how many bugs you want now, which I less eloquently noted here, is becoming more true for performance.
In response to a comment in my last post that the cost of formerly specialized performance work has dropped by many orders of magnitude and performance work that used to require a person or team that had a rare set of skills can be done by anyone who can type a few sentences1, which means that you can do all sorts of optimizations that used to be too expensive to be worthwhile for all but the largest scale or most lucrative projects, Marc Brooker responded with
Completely agree with your closing point. Dynamic custom software, fitted to a part...
Being fast is underrated, I'm telling you.
People make all kinds of excuses for why they aren't fast and don't *need* to be and then they look at people that ship huge projects in a year and go "how?"
danluu.com/culture/