programmer/philosopher/e-acc
Braşov, România
Joined November 2012
- Tweets2K
- Following238
- Followers66
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Petru C. retweeted
People are incredibly impatient with businesses they just started and incredibly patient with jobs they hate.
Petru C. retweeted
RAG is officially cooked.
IBM built a retriever that hallucinates 65x less than fine-tuned RAG systems.
Right now, every company is using Retrieval-Augmented Generation (RAG) to stop their AI from hallucinating.
The idea is to give the AI a private database to read so it doesn't make things up.
But there is a massive structural flaw.
Standard RAG blindly grabs documents based on vector similarity and forces the AI to read them. If the retriever pulls irrelevant garbage, the AI doesn't stop.
It just hallucinates with citations.
IBM just dropped a paper that changes the math entirely.
They built a new retrieval architecture that hallucinates 65x less than state-of-the-art fine-tuned RAG systems.
65x is the difference between a fun prototype and a production-grade enterprise system.
Instead of blindly dumping context into the model and hoping for the best, their system actively filters and validates the retrieved data before the generation step even begins.
It cuts out the noise. It forces absolute precision.
For businesses, this is the holy grail.
Zero hallucinations means zero liability. It means autonomous agents can finally be trusted with sensitive company data without a human babysitting every output.
Petru C. retweeted
Just to be clear:
I don't think anyone is mocking a person being scared they'll lose their job to AI.
We're mocking a person choosing to voice those concerns by crying into the camera and then posting that on the internet as a First-World white lady, pretending the sky is falling.
Someone was even suggesting it's cruel because she's "suffering".
Children getting bombed in senseless wars as we speak are suffering. This woman is not.
Petru C. retweeted
My quick takeaways on the Anthropic S-1:
1. This is a historical moment
2. $6.6M in revenue per employee!! Hard to even comprehend how good that is but Anthropic is AI native as it gets so makes sense.
3. I always thought OpenAI would drop their S-1 first
4. Customers spend about 9x more after a year. Net Revenue Retention is approximately 900% as of Sep 30, 2026. Good SaaS companies brag about 120%.
5. Cowork is growing faster than Claude Code did. Goes to show you the demand for consumer products. Duo will probably rip.
6. 3 years ago this company did $41M in revenue. In the first six months of 2026, it did $16.3 billion. I don't think anyone has a mental model for that curve yet, I sure don’t.
7. Nearly half of revenue comes through cloud marketplaces. About 48% comes from customers buying through them. Big companies buy where their budget already lives, and the lesson for founders selling to enterprises is to get listed where your buyers already spend.
8. Their run rate formula is published: the last 28 days of usage times 13, plus subscriptions times 12, which i guess is the new ARR math for founders?
9. It looks like They're merging Cowork into Claude dot au which tells you the chat box era is ending and the "go do the work for me" era is here.
10. Thousands of Anthropic employees are about to become liquid at once, so expect the biggest wave of new AI startups and angel checks San Francisco has ever seen. Reminds me when Facebook went public but this is way bigger.
Let’s go!
11. Buried in the filing, Anthropic says the gap between what Claude can do and how widely it's used is one of its biggest growth opportunities, so the company itself is telling you the models are ahead of the market and someone has to close that gap for dentists, landlords, and plumbers.
12. Whatever happens, exciting times to be building in AI.
Anthropic has filed an S-1 registration statement with the SEC related to its proposed IPO.
Read more: anthropic.com/news/s1-sec
Legal disclaimer: A registration statement relating to these securities has been filed with the SEC but has not yet become effective. These securities may not be sold, nor may offers to buy be accepted, prior to the time the registration statement becomes effective. This post does not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.
Petru C. retweeted
Tim is right. Steam's AI disclosure rule is abhorrent.
I recently shipped an AI-assisted game, and that label doesn't help anyone pick a game. It's a target. It tells the angry mob exactly where to send the review bombs.
Nobody discloses which engine, which brushes, or which plugins they used. AI gets singled out for one reason: so devs can be punished for using it.
Petru C. retweeted
I'm not sure a lot of people understand what game coders actually do. We're not spending 9 hours a day finely hand crafting artisan software and expressing our inner dreams... 90% of the time we are fighting compilers and existing architecture, having to work out how undocumented code works, and tracking down obscure bugs and behavioural issues.
Most of game programming is just difficult, tedious, laborious grunt work, and the cognitive load we have to endure to get anything done is tiring and frustrating. No game coder is doing it for this 90% of the job.
We make games because the 10% that IS actually about making things fun and expressing ourselves is so incredibly rewarding it makes the other 90% bearable.
Now imagine if there was a tool, some kind of AI agent maybe, which could do most of the 90% grunt work for you, leaving you to just make all the decisions and express your creativity. How amazing would that be. How completely revolutionary would that be.
Petru C. retweeted
If you've ever wondered why smart TVs are so cheap, this is why.
@log4j rooted his Samsung and found an always-on hot mic, automatic content recognition, geolocation, network mapping, ad targeting and user profiling, shared with Samsung's "400 partners".
A lot of it can be blocked in <15 min, wrote a basic guide below.
What your TV is doing
The main culprit is ACR (automatic content recognition). Your TV screenshots what's on screen, fingerprints it, and sends it home to build your ad profile. Samsung does it every 500ms, LG every 10ms [1].
What is insane: it happens on connected devices too.
Plug in your laptop, your console, your work machine, and your TV can fingerprint that via HDMI [1].
He also found that if your Samsung doesn't have a mic, it'll look for one from a connected soundbar or bluetooth device.
teapawt.net/log4j/status/211376224…
It's on by default, and you likely agreed to it on the setup screen you clicked through in 10 seconds.
Step 1: Turn off ACR
Samsung: Terms & Privacy → Viewing Information Services
LG: Live Plus
Vizio: Viewing Data
Roku: "Use info from TV inputs"
Sony/Google TV: Samba Interactive TV
Menus vary by model, but those are the names to look for. While you're in there, opt out of interest-based ads, reset your advertising ID, decline every optional privacy agreement, turn off voice recognition, and delete apps you never open.
Step 2: Give smart devices their own network
Put the TV, cameras, speakers and vacuum on your router's guest/IoT network. The logic is simple: these devices rarely get patched. If one gets compromised (getting drastically more frequent with AI), it shouldn't be able to see your other devices or home network.
Step 3: Block trackers for the whole house with DNS-level filtering
NextDNS (cloud-based) is easy and has a solid free plan. Pi-hole is a little bit more work if you prefer self hosting. For simplicity we'll focus on the former.
1. Sign up at nextdns.io (free tier is plenty)
2. Privacy tab: add a blocklist (OISD is a good bet) and turn on Native Tracking Protection for Samsung, LG, Roku, Amazon (see attached image)
3. Setup tab: copy your endpoint
4. Paste it into your router's DNS settings as DNS-over-HTTPS/TLS (or use the IPs + "Link IP" if your router only does plain DNS)
5. Bonus: block outbound port 53 except to your router. Some devices hardcode their own DNS to get around you
Then open the NextDNS logs and watch how often your TV phones home. It's eye-opening. If an app or update breaks, find the domain in the logs and allowlist it.
Why they do this
TV prices are down 97% since 2000 [2]. Most of that is better manufacturing and brutal competition. But once margins on the hardware hit zero, the cost moved to you.
In Q3 2024, Vizio lost $6.7M selling TVs and made $115.8M in gross profit from ads and viewing data [3]. They've said on earnings calls that they keep TV prices low to grow the audience they sell to advertisers. Walmart bought them in 2024.
This isn't a conspiracy theory either. Vizio paid $2.2M to the FTC in 2017 for tracking 11 million TVs without consent. Last December, Texas sued Samsung, LG, Sony, Hisense and TCL over ACR. Samsung and LG have since agreed to stop collecting that data without explicit consent [4].
TL;DR
1. ACR off
2. Ads + voice off
3. Smart devices on their own network
4. NextDNS filtering on the router
Sources:
[1] ACR study: arxiv.org/abs/2409.06203
[2] Cost of US consumer goods: aei.org/economics/chart-of-t…
[3] Vizio Q3 2024: sec.gov/Archives/edgar/data/…
[4] Texas v. Samsung: texasattorneygeneral.gov/new…
Petru C. retweeted
If AI had been writing and reviewing its own code for the past few decades, and humans had only recently started looking into what it was up to and discovered an ever-growing list of CVEs, we would reasonably conclude that AI hadn’t been good at coding all along and that we should just start over.
Except it’s the other way around.
Humans have been the ones writing and reviewing each other’s code for decades. Very diligently, if I may add.
If we’re being intellectually honest and holding ourselves to the same bar we hold AI to, we’d have to admit that we haven’t been all that good at it either.
Petru C. retweeted
For some people, coding was the only valuable skill they had.
If you made your money by selling your ability to write JavaScript, CSS, Python, or whatever else, I understand why you are pissed now.
"Writing code" is worth very little today.
The sad part is that learning to code wasn't easy. It takes years for someone to become a skilled programmer.
Imagine watching all of those years go down the drain.
If you are a programmer (I mean, just someone who knows how to write code in a particular programming language), your days are numbered.
If you still think AI can't do your job, you are just in denial.
But honestly, writing code was never that valuable anyway. If you were a code pusher, you already knew that the best people at your company weren't just writing code.
They came up with new ideas, designed solutions, architected whole systems, knew how to troubleshoot and fix problems, found different ways to build better software, and, in general, spent almost no time writing code.
Not only are those people thriving today, but they're also the ones who will ride the AI wave and learn to bend it to their will.
So don't cling too long to what you lost; embrace what's already here. AI is a tide that lifts all boats, but you have to be open to it.
Petru C. retweeted
Scientists found a way to flush Alzheimer’s plaque out of the brain in minutes.
Without any surgery and drugs.
Your brain has a waste-clearance network called the glymphatic system. It flushes out toxic proteins and dead cells.
But it only really activates during deep, slow-wave sleep.
If you don't sleep, the trash piles up. Over time, that buildup leads to cognitive decline and Alzheimer's.
Until today.
Researchers just published a paper proving they can manually trigger this cleaning cycle.
Without you ever going to sleep.
They used 40.68 MHz ultrashort waves (USW) beamed non-invasively into the brain.
Within 10 minutes, the brain's fluid flow rapidly accelerated.
The waves artificially synchronized the neurons into a Delta state, the exact frequency of deep sleep. This forced the brain's water channels to open and start flushing out the system.
They tested it on mice with traumatic brain injuries and Alzheimer's pathology.
The brain swelling dropped. The toxic proteins were cleared out. Cognitive deficits actually improved.
No surgery. No massive chemical interventions. Just a frequency.
Petru C. retweeted
Next step: Longevity and Rejuvenation. We are almost there.
Researchers in Bonn turned blood cells from an 80-year-old into neural stem cells with a molecular age below 20. More than 60 years younger by epigenetic clocks, which estimate age from chemical marks on DNA.
The team directly reprogrammed blood precursor cells into neural stem cells, skipping the usual pluripotent stem cell stage. The rejuvenation unfolded gradually and could be tracked for over 100 days.
Petru C. retweeted
Dr. Christopher Stubbs is joining our Long-Term Benefit Trust. Chris is an experimental physicist and a former Dean of Science at Harvard University. He has also advised the US government on national security and arms control.
Read more: anthropic.com/news/christoph…
Petru C. retweeted
This is amazing and shows what would have taken a vast manual effort in the past can be done as a hobby project very efficiently. Truly a new age of gaming and software ahead.
I ported @TimSweeneyEpic's 1991 shareware PC classic, ZZT, to the Nintendo Entertainment System using Claude Code. One of the most underrated games of the '90s
ASCII art on a NES is more fun than it sounds. It runs on a standard MMC3 cart, real hardware, new soundtrack!
Petru C. retweeted
a critical vulnerability was just discovered in PHP. the language that runs 80% of the internet
severity score: 9.2 out of 10. that’s about as bad as it gets
what can an attacker do with this? take full admin control of a server. steal entire databases. passwords, credit cards, payment histories. plant malware and use the server to attack other systems
but here’s the terrifying part that most people missed
the moment the patch drops tonight attackers are expected to use AI to reverse engineer what was fixed within 15 minutes
15 minutes. that’s the window between the fix going live and automated attacks launching worldwide
every online store, booking site, and corporate system running PHP that doesn’t update in those 15 minutes becomes a target
this isn’t just a developer problem. if you’ve ever signed up to a website, entered your card details, or created an account online your data is sitting on servers that might be vulnerable right now
and someone just publicly dropped the working exploit on twitter before the patch was even ready. gave every attacker on earth a head start
engineers worldwide are pulling all-nighters tonight to patch their systems before the attacks begin
change your passwords on any service that matters to you. enable 2FA everywhere. and watch out for fake “maintenance” or “password reset” emails over the next few days
the internet is about to have a very long night
Petru C. retweeted
What is effort really? When do you change it it and why not just use max effort for everything?
I dove deep into this problem, looking into evals and doing my own tests and I was quite surprised by the results.
Petru C. retweeted
The future of gaming is not AI replacing devs. It is one person with a strange idea finally able to build the game that used to need fifty people. The gatekeepers lost the keys. Get ready.
Petru C. retweeted
When I was writing Unreal Engine 1, my time was divided as follows:
- Around 30% went to seriously deep coding on hard problems: assembly language texture mappers, C++ BSP trees, data persistence, object oriented systems design, and networking.
- Around 70% was just typing and refactoring large bodies of code needed for a complete engine feature set. This was not hard, and while I was doing it my mind was mostly on the deeper coding topics, thinking and planning for what's next. It didn't feel much different from vibe coding today, except that it was just me typing code on an IBM Model M keyboard rather than prompting it and reviewing the results.
So, it has always seemed perfectly logical that we would rely on AI for that 70%, once the AI could do it with a similar quality standard as we could, which has never been perfection. It came as no surprise that, after a few years of AI model evolution, it was able to take the reigns on that 70% and free up programmers' time for more valuable tasks.
What's more of a surprise is the emergence of AI as a sort of insta-Carmack able to solve hard technical problems quite cleverly and often cleanly, and that it's able to reason about and work in complex 3D scenes both by operating the tools and by directly understanding the raw data files.
I abandoned assembly language in 1998 when out-of-order CPUs made much simpler C/C++ code faster, and never I missed it. If prompting through architectural documents, concept art, and design plans can transcend typing code and tweaking vertices, that will enable developers to spend their time on higher-level, higher value technical and creative tasks.
What matters is the end product, whether it's a game or an engine. Anything developers can do to try out more ideas and make better software and games faster is a win for everyone.
