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Posted by dmarcos 16 hours ago

I’ve joined Anthropic(twitter.com)
https://xcancel.com/karpathy/status/2056753169888334312

https://www.axios.com/2026/05/19/anthropic-openai-karpathy-a..., https://archive.ph/h6T3X

1263 points | 524 commentspage 5
MangoCoffee 15 hours ago|
good name recognition for Anthropic mega IPO. everything Anthropic does now is all gear toward its IPO from buying Bun, Stainless, getting big name AI guy to join...etc.
baigy 14 hours ago||
Congrats to Karpathy. I wonder whether this is the right time to join Anthropic. Looks like it from the outside.

But - unpopular opinion - I believe Anthropic is one open-source model away (that can code well) from a massive revenue/stock crash. We're already seeing Claude's cost escalate to astronomical levels. Most coding work is medium difficulty in the grand scheme of things. So the future is an open source model small enough to fit in your local 16GB VRAM, giving you a Claude Code like experience for zero token cost. That's going to wipe out most of Anthropic's current revenue base. It does have several cool initiatives in the pipeline, but bad things happen once your bread and butter is threatened (just ask OpenAI).

energy123 14 hours ago||
I heavily weight the explosive revenue growth of Anthropic and OpenAI above speculation about what open source models may do in the future. I've heard for over 6 months that there's no moat but the revenue growth keeps proving it wrong. Opinions have to adjust to meet reality. There's some kind of moat, for now at least, that is not being appreciated in the conventional wisdom.

(If they were just burning Capex and nobody wanted to use their product or their gross margins were bad then I'd agree with you)

baigy 13 hours ago||
Your opinion also holds weight. In fact, I've been in your camp throughout, only having changed my mind in the last few weeks. I've seen legitimate instances of Anthropic costs surprising medium to large enterprises, so that's a demand shock. On the supply side, I've seen some very intense benchmarking going on at r/LocalLlama (the #1 community for opensource LLM tinkering IMO). It just feels like we're in a powder keg right now.
codemog 14 hours ago|||
GLM 5.1 is almost there. These guys should be scared. The valuations these companies have is insanity.
ahknight 14 hours ago||
Not in extended sessions, I've noticed. It's good at targeted edits, but not "build a small tool that XYZ".
ahknight 14 hours ago|||
Model diversity is really their weak point. OpenAI has embeddings, audio, image, video (RIP). Anthropic has ... Claude. It's a great model for a lot of things, but it's super risky to just have one thing you're good at (from a business standpoint).
nekooooo 14 hours ago||
those models are light years away from opus or sonnett right now though -- is the context problem really solvable?
zackangelo 14 hours ago||
absolutely not, take Kimi K2.6 for a spin
frellus 15 hours ago||
Sort of makes me sad, but . . . everyone has a price.
helloplanets 15 hours ago||
Not about money, but knowledge. The frontier of the field is no longer accessible through arXiv or research papers only.

One thing is that the companies are holding on because of competitive advantage, and I think another is that AI is such a politically polarizing topic that actually being open about everything is risky for the companies, wanting to avoid controversy.

LatencyKills 15 hours ago||
I worked for MS and Apple for 20 years and heard that opinion constantly; i.e., "People only work there for the money."

I have no idea if Andrej "sold out" but perhaps he realizes that if he wants to work on the cutting edge alongside talented people, with a seemingly endless budget, Anthropic is a good choice.

I chose my employers for the same reason; the compensation was secondary.

surgical_fire 15 hours ago||
MS and Apple. Infinite resources, plenty of smart people that consider compensation to be secondary (I remain skeptical, but choose to entertain the idea nonetheless), and the software output is incredibly, unbelievably, comically bad.

There's some poetry there that I am unable to capture with words.

Barbing 15 hours ago|||
Apple’s software defects can be comically bad. Software overall though, you may overstate.
LatencyKills 13 hours ago|||
I understand where you are coming from, but at least when I was there, we were still trying to develop solutions that had never been implemented at that scale before (just like Anthropic today). I helped create the first version of Visual Studio (Boston). People tend to forget that even by the 90s we still didn't really understand how to solve a lot of the main technical problems. That's what I loved about the work. Everything seems easy/obvious after the fact.

When I left MS, a full Windows build was about 18M LOC. The fact that 18 million lines of code, written by tens of thousands of engineers, worked at all was a mini miracle.

With regard to compensation: like Karpathy, I had already earned enough to be comfortable for the rest of my life. Once money stopped being the primary driver, I was able to focus on what made me happy. Building things, even if you don't like them, brought me happiness and fulfillment. I hope Andrej finds the same at Anthropic.

amazingamazing 16 hours ago||
Money always wins.
resiros 16 hours ago||
I don't think this is true. He strikes me as a person motivated by curiosity and interesting problems.
lucketone 15 hours ago||
Still, one can buy lot of interesting problems with that money.
United857 15 hours ago|||
As a OpenAI founder he already is long past the point of money being a consideration.
brcmthrowaway 11 hours ago||
The 2010s founders, how much are they worth?
martingalex2 15 hours ago|||
It's the only way he could get more tokens beyond the Max 20x plan lol.
Sol- 16 hours ago|||
Come on, he definitely has more money than he needs given his past employers. For someone with his creative output, he probably just enjoys having an environment to build and explore.
moralestapia 15 hours ago||
Your argument contradicts itself.

If money was not an issue he could just build that environment for himself.

whiplash451 11 hours ago|||
You can’t build “working with amazing people”. At least not in a short amount of time. I bet that this was a significant part of the decision for Andrej.
skeledrew 15 hours ago||||
The overhead of maintaining and running things isn't interesting to most creative folk. They'd rather others deal with the minutiae (managing a company, etc) so they can focus on their thing.
0123456789ABCDE 15 hours ago||||
i can play by myself, or i can join some friends, and make the play more joyful
HDThoreaun 15 hours ago||||
No, money is not the only barrier to building things. I think karoathy could build his own lab if he wanted, but it would be years of doing things he doesn’t want. Why waste time running a business when he’d rather be researching?
CooCooCaCha 15 hours ago|||
Do you have any idea how much it costs to build a frontier model and how much money it takes to enable R&D at the cutting edge?
bell-gwen 16 hours ago||
True.
mattsears 7 hours ago||
Way too late.
ed_balls 10 hours ago||
Meta: Why 1000 votes?
SequoiaHope 10 hours ago|
1000 people think it’s a cool story. (I am one of them). I like Karpathy and I like Anthropic and I’m excited to see them together.
bicepjai 15 hours ago||
Great communicator. It’s sad that he had joined a closed llm org. I would have expected him to join forces with someone else releasing open-source models rivaling chinese model landscape. Capital always accumulates to the capital holder in capitalism :)
scottyah 15 hours ago|
Hopefully he gets them to opensource some models, in the same way that Google does.
msp26 14 hours ago||
hell will freeze over before anthropic release anything meaningful to the public
w2seraph 8 hours ago||
Bravo Andrej
bigbuppo 13 hours ago||
I would like to announce I've retired. The tech industries are screwed and the future is paper.
lysecret 14 hours ago|
Honestly happy he’s back at a foundation lab. He will have insane impact there. Of course one of the best educators in the world it’s a bit sad he gave up building and education tool.
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