David Schaub

Applied AI Engineer who is soldering at night

check my website for more

[David Schaub @dsnein]

batshit crazy pickup today. a 1984 video vendor vhs vending machine.

[David Schaub @dsnein]

@lateinteraction @willccbb 👀

[David Schaub @dsnein]

@anpaure @tautologer a vocal minority is just mad because it’s not THEIR research tool anymore.

we never see this outrage when they have the backstage passes, even when that overlaps with the public not having access.

this makes the claim that their outrage is about public access very dubious.

[David Schaub @dsnein]

@airkatakana @hopes_revenge @sporadica @AnthropicAI for real, no idea what people are smoking. “i wish they told us it was nerfed for many things”

… they did.

i cant believe they won’t let you do ai research with it! really? did you forget when they IP banned the openai office from claude code?

they’re consistent actually.

[David Schaub @dsnein]

@hopes_revenge just make sure the people you kill were thieves and you can keep your hero meter up

[David Schaub @dsnein]

@verrsane I had to build an entire IP censorship system before Azure had that by default. Think guardrails for people uploading sensitive stuff. Reject sometimes, line item censor or word swap others.

We have a long way to go on understanding enterprise business needs.

[David Schaub @dsnein]

@tom__ballard @omooretweets only one year? bleeding edge mom tbh

[David Schaub @dsnein]

@yacinelearning the anthropic hate has been building up for a while

it drives people to do weird stuff like act like openai is saintly. or to forget that anthropic has a long history of not letting you use their tools to compete with them. or to do vaguely defined (if at all) unsafe tasks.

[David Schaub @dsnein]

@xeophon based

[David Schaub @dsnein]

@Teknium Because the market is enterprise, not AI researchers. Anthropic is following the money, always has been. They have also always restricted people from upgrading their own AI platforms with their models. Day one.

They’ve simply found a new way to attempt that.

[David Schaub @dsnein]

@kitten_beloved @TomVaid @cremieuxrecueil we don’t because of NIMBYs and a certain political party

[David Schaub @dsnein]

@tekbog the main character died and woke up in shibuya at the end of KH3

[Taelin @VictorTaelin]

this is my personal singularity moment

this post may sound like a paid ad. I only wish. I'm concerned, more so than happy. the world is changing, and, among the scenarios where AI goes terribly wrong, inequality is the most realistic, yet, the one Anthropic seems to be the least concerned about. I'm glad OpenAI is taking the opposite stance: *personal AGI for everyone*. I think this is a commendable position in the times we live. but who am I in the queue of the bread?

anyway, Fable is here, so I'll just report my first-hour experience

first of all, all my pet prompts are solved.
→ λ-calculus puzzles
→ bug questions
→ one-shot apps
all are trivial to it.

I don't have anything harder other than my
ongoing work

so, in the last several days, I've been toying with HVM5, a new interaction net evaluator with a faster loop.

after writing the first version, I left 32 GPT-5 agents working for ~20 hours each. this resulted in up to 2x speedups, but the file size increased by 2-fold and quality decreased significantly.

I then simplified the whole thing into an even simpler core, and left Opus 4.8 and GPT 5.5 optimizing it for 8 hours. Opus got a legit 6% - 34% speedup in most benches. GPT got better results, but, sadly, an unusable file.

I then asked Fable to optimize it.

2 hours later, it landed a 1770% speedup in one case, 100%+ in other 4, and 22% in average. yes, in 2 hours it outperformed me, opus 4.8 and a swarm of gpt 5.5 agents, by one order of magnitude.

that could not possibly be legit. "it must be hardcoding the benchmarks" (GPT trauma). so I read its explanation and what it did was, indeed, the most high impact optimization one could try first. seems like HVM5 was wasting a lot of time garbage-collecting unused branches of pattern-match nodes. I had optimized that for static mats, but not for dynamic mats. skill issue. Fable figured how to do it for these, resulting in a massive speedup in some benches

but wait, is that *correct*? I'm not sure yet, it is credible, but this is the kind of thing that is very easy to get wrong on interaction nets. the problem is, when I was ready to start auditing Fable's solution so I could tell whether it was buggy or legit, it interrupted me to tell me it had found a massive bug on the code *I* had written.

... wait, what?

so... for garbage collection purposes, I stored a bit on lambda term pointers that meant "the variable bound by this lambda has been freed, so, its lambda must free whatever argument it is applied to". that's fine. yet, on duplicator nodes, I also used the same bit to mean "one of the duplicated variables was freed, so, treat this dup as a passthrough no-op". so, if a lambda entered a duplicator, it would mistake the lambda's collection bit for its own, resulting in corrupted interaction!

that's a mouthful, why I'm writing this?

just so you can appreciate the sheer absurdity of what just happened. I didn't ask it to find bugs. I asked it for an optimization. and even if I did ask it to find bugs, this bug is so astonishingly subtle and specific, identifying it takes mastering the domain to an extent that it beyond even me. I'd easily need hours or days to fix it, *if* I ever came across it. chances are it would just go unnoticed. and Fable found it and fixed it like it was nothing, while it was busy adding a 17x speedup to a file that neither I, nor Opus 4.8, nor a fleet of GPT 5.5 managed to barely make 2x faster.

oh and there is also another tab where it is also ripping through Bend's codebase and finishing everything I had to do

I don't know what to say anymore

this isn't about Anthropic or OpenAI, this is about our collective future as a species. the world is changing, and we need to be aware of it, and discuss how to handle this change.

receipt below . . .

[David Schaub @dsnein]

@giyu_codes if it was google you’re cooked

[David Schaub @dsnein]

@basedalexandoor they nerfed claude mythos in the API

[David Schaub @dsnein]

@tomieinlove in dune society replaced ai supercomputers with human ones called mentats, drug addicted mutants for travel, and a cabal of breeders. this is perhaps worse than if they stuck to ai because finite elite specialist humans are much easier to build empires around than buildings.

[David Schaub @dsnein]

@willccbb JCpenai made me do a leetcode for the interview

[David Schaub @dsnein]

@dirtman row, row, row your boat
row row fight the power

[David Schaub @dsnein]

@growing_daniel @coldhealing how do you know it’s the bro making that choice

[David Schaub @dsnein]

@hopes_revenge if you don’t name a logo color they brand you

[David Schaub @dsnein]

@keithwhor i did notice that 1999 indeed turned out to be the peak of human civilization