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nico

4,219 karma · joined October 11, 2007

Creator

* OpenJam, vibecoding for PMs who feel stuck in the discovery process and want to iterate fast: https//openjam.ai

* AI job search tool, Command Jobs: https://github.com/nicobrenner/commandjobs

* Wheelless, experimental RC toy that moves using vibration: https://www.tiktok.com/@wheelless?_t=8prRonmSXyV&_r=1

* Online JS image processing filters and animation, Blursort: https://jsfiddle.net/nicobrenner/a1t869qf/

Founder

* ClickFono (cloud phone platform for businesses) https://clickfono.com

* AutopilotReviews (customer satisfaction surveys that don't suck) https://autopilotreviews.co

* Lemontech (software for lawfirms) https://lemontech.com

_

submissionscomments
nico··on 56k.rip – the 1996 dial-up internet experience
That chat was fun, 20 people online!

Some were asking: a/s/l hahahaha

nico··on UnoDOS
> You have discovered a load-bearing gap, full stop.

I lowkey hate that I knew exactly where this reference is from :'(

It's true that almost no-one RTFM

nico··on Livenerf: Has Opus 5.5 been nerfed yet?
Anecdata: I've been running a long-lived claude code session with Opus 4.6 for the last few days. Yesterday, almost right after the Sonnet 5.5 announcement, codex starting asking for permission to run things a lot more often

The quality of the output/work seems the same, but the speed at which it gets stuff done is a lot slower, because it's asking for permission so much more

I don't have any numbers/stats, just my impression. However, I imagine that if Anthropic could make the models ask for permission more often, it could be an interesting way to throttle access, without degrading quality of the output

nico··on Nicholas Polson has authored 258 academic papers in 2026 so far
> AI submissions, soon AI reviewers, and shortly after only AI readers

This is already happening. Write code with an AI agent, agent creates PR, other agents review, coding agent iterates, PR gets merged, and hopefully real humans use the application and provide feedback

The latter step is also now staring to be replaced by AI (user directs agent to access app, get data, perform actions)

Similar thing with email

nico··on Jeeves. Reasoning improves Jev-like decision models
That's a great point. My case is not for spam, the classes are more balanced, but you are correct that precision, recall and f1 would be better measures for some of these tasks
nico··on Dots: Always-on agents
From that link:

> A protected workspace for each dot

> Each dot has its own cloud computer, where it can browse, analyze information, create files, and run tools. Dots can keep making progress in these workspaces, even when you are not actively engaged.

> Within each dot’s protected workspace, sandboxing restricts what code and tools that dot can access, helping contain the impact of harmful code or a mistaken command. We also isolate users’ cloud environments from one another and maintain the underlying Linux operating system and Chrome browser

> Each dot’s cloud workspace brings together its computer and the tools it can use. You choose which apps to connect and whether to connect your personal computer. Auto-review checks actions that need review before they run

So it seems like it runs on a Linux container on OpenAI’s cloud infra, but can get access to your local env through ChatGPT’s/Codex on your computer if you give it access

nico··on Jeeves. Reasoning improves Jev-like decision models
> I'd imagine it would be hard to train a classifier to do something like this because you'd need to represent a good distribution of all the states

Yes, one general classifier would be very hard to train. However, you can create a sort of ensemble of classifiers, each trained in different tasks

I’m currently experimenting with this. So far I’ve combined classifiers for 13 different datasets, my target is 95 (the ones Laya used for training)

nico··on Jeeves. Reasoning improves Jev-like decision models
For email you can use a classifier

One way: separately embed sender, recipients, subject, body - then use the embedding vectors as input to a logistic classifier

With that setup, I get 95% accuracy on email classification, training on 50-100 base examples. The model trains on CPU in under 1min, and it does inference in under 20ms (most of it is running the embeddings, so you can make it faster if you train your own embeddings model)

Here’s a gist with some sample code: https://gist.github.com/nicobrenner/056a5aaff5d0119c0032ecda...

That code applies the embeddings + classifier setup on the Banking77 dataset. It gets 93-94% accuracy depending on the embeddings you use (SOTA for this is ~95%, with much bigger and slower models)

nico··on Jeff – Jev-compatible 0.8B decision models, trained at home, ~30 ms
I’m in the process of piecing together the different task/dataset-specific classifiers

Depending on how much overfit, you can go from routing deterministically based on features/shape of the input data, all the way to training a routing model (which could be a classifier too). I’ll need to experiment to find the best approach

For completely unseen/unexpected, I’ve also experimented routing to a local LLM: request comes in, if there’s a marching classifier, send it there, otherwise send to LLM+training. As the system learns more tasks, the % of requests that go to the LLM go down over time

nico··on Jeff – Jev-compatible 0.8B decision models, trained at home, ~30 ms
You are correct, I didn’t train the embeddings model

Here's a gist with code you can use to test the Banking77 dataset: https://gist.github.com/nicobrenner/056a5aaff5d0119c0032ecda...

The gist uses BAAI/bge-large-en-v1.5, which is 1.2GB approx. You can replace it for all-MiniLM-L6-v2 (91 MB @ fp32 or 45 MB quantized fp16) small enough for mobile/edge. With all-MiniLM-L6-v2 it still gets 93.0% on Banking77, only 1.3 points behind bge-large at 15x smaller

I haven’t compared different ways of sending requests to Jev

The data to train the classifiers comes from the datasets used to test them (not from Jev)

nico··on Jeff – Jev-compatible 0.8B decision models, trained at home, ~30 ms
Not sure the task at hand here. But if it doesn’t require any reasoning/thinking and it’s just a classification task, it’s worth a shot to look into training your own classifier

I’ve run some benchmarks. Using embeddings + logistic classifier, the architecture matches or beats Jev and Laya in all basic classification tasks (datasets tested: AG News, Emotion, MASSIVE Intent, Banking77) The type of task in which it does really well, especially against Laya, is classification with >50 classes

The classifiers also run in <1ms, so they can be very fast and precise at the same time

But this architecture has no “reasoning”, so it performs rather poorly on tasks that require it, like the ones from the XLNI dataset (Jev/Laya do a lot better on this one)

For the latter cases, you could use add a local lightweight LLM, something like a Gemma model. Or even some basic MLP, depending on the tasks/data

nico··on Jeff – Jev-compatible 0.8B decision models, trained at home, ~30 ms
Oh wow, those Doom scores for Jeff are pretty terrible

The Von numbers have led me on a rabbit whole of getting a classifier to play Doom

I got it to average 22 kills (the max is 26) on that same scenario that Jeff and Von are testing on (it’s called Defend Center)

Now I’m having it play a more advanced scenario, and it’s doing about 45 kills (SOTA is ~59 kills)

It’s amazing what you can do with small classifiers if you can collect some data. These models I’m testing train on CPU in seconds (what takes the longest is running the game, doing test runs and collecting data), they are <1MB in size and do inference in <1ms on CPU

Edit: after looking at Jeff's numbers more in detail, the 6.5 kills number is not that bad, but it can definitely be better ;)

nico··on "Music video" app of song Give it 2 me by DJ_Dave
Be warned: it's a zip file that contains a vibecoded app, it's going to ask you for permission to take over your computer, and it will. It's a scary experience, but also pretty awesome. Very unique way of making a "music video"

Also, it only works on Macs

Btw, DJ_Dave will be performing in LA this Thursday, and SF on Saturday : https://linktr.ee/dj_dave

nico··on Ember-1
I’ve tested this with some local LLMs and their accuracy is in general better than Jev/Laya, but they are super slow in comparison as well

For example, a typical/stock LLM can’t really play Doom in real time, but a Jev-like model can. Just because of latency

Of course, if you want the best Doom player, there are way better and faster adhoc models

nico··on Ember-1
> The problem: thinking models think too much

This is partly the appeal of Jev et al; having a quick model for simple tasks, that doesn’t require that much thinking

It’s amazing all the workflows that models like that can unlock. And yes, classifiers and other ML models have been around for a while for these types of tasks, but Jev has made it easy and cheap to play and experiment. This in turn, is incentivizing people to try them for a bunch of stuff, unlocking creativity and producing a lot of new cool (and eventually potentially very useful) applications

nico··on Promising discoveries about the potential for life on one of Saturn’s icy moons
In the case of weapons development, it's not about whether someone will do it or not. It's about whether that is a good reason/excuse to then do it yourself

So, if someone else is going to develop something very harmful, is the best solution to develop something equally or more harmful? Or are there maybe other better solutions to this problem?

nico··on Show HN: Jev Plays Pokémon Red
Wow, it looks like it was able to finish the game (or they stopped it), after almost 38hrs of play and a total of $1.65 in Jev requests

Very cool proof of concept!

nico··on Show HN: Tokken – a browser fighting game where AI models fight and HP is tokens
This game is amazing! the controls are kinda hard to find, and the CPU beat me embarrassingly fast, but it was so much to play and go through the intro + character selection screen. Very funny
nico··on Show HN: Jev predicting your life choices
This is very cool. And I think the format is potentially very useful. But the questions are not that good, because most of the answers don't perfectly fit the exclusive labels presented as options

For example:

Going 600 km for a family event. How do you travel? * Overnight train * Flight * Drive * Sleeper bus

To me the answer depends. It depends on things like what kind of family event it is, the urgency, who is going, who is coming with me, availability and timing. So essentially, there's a lot of missed context, that is not being captured or represented well enough to produce good predictions

nico··on Show HN: Jevgpt – reinventing the wheel with another wheel
This is amazing. I don't think I fully understand how it works, but the core of having Jev (or some classifier), generate the words/tokens it's going to output by picking/classifying the words/tokens, is very cool

Where do you see the biggest potential improvement gains?

nico··on Kev: Tiny Jev-like family of decision models built on top of Qwen3.5
Here's a gist with code you can use to test the Banking77 dataset:

https://gist.github.com/nicobrenner/056a5aaff5d0119c0032ecda...

The <10MB does not include the embeddings encoder

The gist uses BAAI/bge-large-en-v1.5, which is 1.2GB approx. You can replace it for all-MiniLM-L6-v2 (91 MB @ fp32 or 45 MB quantized fp16) small enough for mobile/edge. With all-MiniLM-L6-v2 it still gets 93.0% on Banking77, only 1.3 points behind bge-large at 15x smaller

nico··on Kev: Tiny Jev-like family of decision models built on top of Qwen3.5
Mostly 2 languages

Haven’t tried with more

Do you have a specific use case?

nico··on Kev: Tiny Jev-like family of decision models built on top of Qwen3.5
> Basically, the whole thing has turned into a Collect -> Distill -> Train pipeline for whatever I happen to need

Amazing, thank you for sharing your setup. Very cool applications

nico··on Kev: Tiny Jev-like family of decision models built on top of Qwen3.5
Very cool. What kinda of classifications are you running? How big are the models/training sets?

Also curious about if you plan on doing some sort of routing for the requests. Like detecting the type of task to decide which model to route the request to

nico··on Kev: Tiny Jev-like family of decision models built on top of Qwen3.5
Yes, I ran some benchmarks. This architecture seems to match or beat Jev and Laya in all basic classification tasks (datasets tested: AG News, Emotion, MASSIVE Intent, Banking77)

The type of task in which it does really well, especially against Laya, is classification with >50 classes

But this architecture has no “reasoning”, so it performs rather poorly on tasks that require it, like the ones from the XLNI dataset (Jev/Laya do a lot better on this one)

For the latter cases, you could probably enhance the architecture with a lightweight LLM, something like a Gemma model. Or even some basic MLP

nico··on Kev: Tiny Jev-like family of decision models built on top of Qwen3.5
If you only need classification, and you can provide some training data, you can ask Codex/Claude to build an embeddings + logistic classifier model for you

For emails, I get 95% accuracy with this method, with only 50-100 examples for training

Training the model takes less than 5 minutes on a CPU

The resulting model is <1MB, and inference is sub 100ms

Some other cool things about this approach:

* the model doesn’t train on some “ideal” or general classification, instead it learns your preferences

* the model runs on pretty much any mobile device and can be retrained online on the device

* privacy, the whole training and inference is 100% local, no data goes anywhere (except whatever you feed codex/claude while building the model)

Note: to do a more general test, I made a classifier for the Banking77 dataset. The model is <10MB, trains in <30s on CPU and gets 94.5% accuracy, which puts it in the top 5?models by accuracy for that set (the best one is at 94.86%, but it’s 350MB in size and takes hours to train on a GPU).

nico··on Neovim have a ~$800k Bitcoin donation sitting untouched since 2023
> Also see: https://m.xkcd.com/2501/

The other day a neighbor asked me about AI. I said I wasn’t really up to date with things anymore. They asked: like what things? And then I said: like the Astra model that OpenAI released yesterday, I know nothing about it. And they were like: “bro, yesterday?! And you feel you’re not up to date?! Pfff”

nico··on Learning Programming in an Age of LLMs
> After months of refactoring I had an uncomfortable realization: I may have built a system that is above my own level of understanding. When everything works, that gap is almost invisible. When it doesn't, it becomes very real.

> "Sometimes I genuinely don't know what to do next without asking another model. That made me wonder whether I spent a year building a product, or partly building the appearance of one: something sophisticated enough to work, but which I don't yet understand deeply enough to truly own

This is always the reality for a sufficiently complex system. We only have an illusion of understanding

Now, more specifically about this feeling, it’s the way a lot of managers feel as well. They can only ask others to fix/change things, and they don’t really understand how/why things break in the code. Even if they lead the whole team to build the product

nico··on Λ Snap – An inviting programming language for kids and adults for CS study
Nice! Can this be used with a LEGO Wedo set? It would be cool to have some alternatives to the deprecated/unsupported official software, some of which no longer works (like the iOS app)
nico··on Any Human Ever – One life, drawn at random from all who have ever lived
It seems like the server might be overwhelmed

Very cool project

I was wondering if the generated people “fill up a spot” and temporarily change the stats for generating new lives. Eg, if the app already generated 10M stories, is it still using the same initial distribution for the new ones, or is generation conditioned on the stats of the already generated?

The random life I got: https://anyhumanever.com/life/1323665477-1682995380-16357802...

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