Gary Marcus

Gary Marcus

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Cognitive scientist discussing AI limitations and implications for robotics intelligence

TBPN Stays Silent on Farrow‑Marantz Altman Exposé
SocialApr 7, 2026

TBPN Stays Silent on Farrow‑Marantz Altman Exposé

I missed it. What did the “editorially independent” @tbpn say about the @ronanfarrow @andrewmarantz @newyorker exposé on Altman? Or did they remain silent?

By Gary Marcus
LLM Hallucination Rate Actually 4.6%, Not Near Zero
SocialApr 6, 2026

LLM Hallucination Rate Actually 4.6%, Not Near Zero

This ML Prof told me that the hallucination rate for frontier reasoning LLMs is “next to nil” And then gave me data, only after I pushed him, showing a best-case rate of 4.6% (which of course is benchmark specific). 4.6% is not...

By Gary Marcus
Y Combinator Leader Overlooks OpenClaw Security Vulnerabilities
SocialApr 6, 2026

Y Combinator Leader Overlooks OpenClaw Security Vulnerabilities

Wild: the head of Y Combinator seems pretty blind to the security risks in OpenClaw.

By Gary Marcus
Hallucinations Remain Unsolved in Cutting‑Edge Reasoning Models
SocialApr 6, 2026

Hallucinations Remain Unsolved in Cutting‑Edge Reasoning Models

I have an ML professor asserting that hallucinations have been solved in recent frontier reasoning models. Please supply any data you know that supports or rebuts this claim.

By Gary Marcus
AGI Hype Fueled by Profit, Not Reality
SocialApr 6, 2026

AGI Hype Fueled by Profit, Not Reality

the only people who claim AGI is here are people who stand to make money if other people believe that mess. see https://t.co/sNALm0rFN2 for the views of Bengio and myself.

By Gary Marcus
CFO Dissent Hints Looming Trouble for OpenAI
SocialApr 6, 2026

CFO Dissent Hints Looming Trouble for OpenAI

when OpenAI’s CFO starts whispering that she doesn’t buy the CEO’s plan, the shit may be about to hit the fan.

By Gary Marcus
NYT's Glowing
SocialApr 5, 2026

NYT's Glowing

I am appalled by the puff piece NYT wrote about “billion dollar” company Medvi. Here’s a very different perspective: https://t.co/kPriYYd0dB

By Gary Marcus
Microsoft Takes 3.5 Years to Label AI Entertainment‑Only
SocialApr 4, 2026

Microsoft Takes 3.5 Years to Label AI Entertainment‑Only

Generative AI: It’s “For Entertainment Purposes Only”* *and it only took Microsoft 3.5 years to figure that out. https://t.co/GeLJRirwLa

By Gary Marcus
LLM Hallucinations Mirror Human Cognitive Errors
SocialApr 4, 2026

LLM Hallucinations Mirror Human Cognitive Errors

So many people are confused about the relation between human cognitive errors and LLM hallucinations that I wrote this short explainer two years ago. Since many of those confusions persist, I am reposting:

By Gary Marcus
Defining AI Hallucinations: Overgeneralizations vs Searchable Errors
SocialApr 4, 2026

Defining AI Hallucinations: Overgeneralizations vs Searchable Errors

Do you take a narrower or broader meaning for the term “hallucination”? Does it mean (only) overgeneralizations and confabulations? Or do you also include, for example, boneheaded errors that could have been solved by search?

By Gary Marcus
Stanford Study Reveals AI Still Hallucinates Unseen Visuals
SocialApr 3, 2026

Stanford Study Reveals AI Still Hallucinates Unseen Visuals

Folks, I gave a cute example of a hallucination earlier today because I thought it was funny. But if you think hallucinations are remotely solved (as some people alleged in the comments), you really need to look at this recent...

By Gary Marcus
Aim for the Top of Graham’s Argument Pyramid
SocialApr 3, 2026

Aim for the Top of Graham’s Argument Pyramid

Periodic public service announcement, which unfortunately all too often seems necessary in this joint: Always aspire to the top, not the bottom, of @paulg’s beautiful pyramid of argumentation: https://t.co/l6znT8ePiu

By Gary Marcus
AGI Must Be Truly General, Not Olympiad‑Specific
SocialApr 3, 2026

AGI Must Be Truly General, Not Olympiad‑Specific

this is soooo wrong. the whole point of AGI is to be *general*, across all problems. that’s literally what the G stands for, general. Olympiad problems are narrow, and don’t per se have anything special to do with AGI. For some discussion...

By Gary Marcus
Free LLMs: Hype, Profit, and User Blame
SocialApr 3, 2026

Free LLMs: Hype, Profit, and User Blame

It’s nice gig making LLMs. You can distribute free models that suck. Hype them to the skies. Take credit for the hundreds of millions of user you’ve got. And when they make a mistake, you can blame the users for not using the paid...

By Gary Marcus
AGI Forecasts Slip Back, Media Hypes Panic
SocialApr 3, 2026

AGI Forecasts Slip Back, Media Hypes Panic

LMAO. Last year most of Silicon Valley was predicting AGI in 2027 (which, spoiler alert, ain’t gonna happen). Now the most prominent former advocate of AGI in 2027, @DKokotajlo, says 2029, and Groks writes it up as “AI forecasters shorten timelines...

By Gary Marcus
Charlie Duke Calls for Return to Moon via Artemis
SocialApr 3, 2026

Charlie Duke Calls for Return to Moon via Artemis

In honor of Artemis: Yours truly with Charlie Duke, youngest living human to have walked on the moon. Let’s get back there, soon. 🌖 https://t.co/PkTaRIMwJG

By Gary Marcus
Which Company Will Fund AI's Scientific Breakthroughs?
SocialApr 3, 2026

Which Company Will Fund AI's Scientific Breakthroughs?

Which company’s dollars are more likely to lead an advance in AI for science? 🤔

By Gary Marcus
Superintelligence Redefined: From Human Supremacy to Product Value
SocialApr 2, 2026

Superintelligence Redefined: From Human Supremacy to Product Value

Talk about moving goalposts. This one from MSFT’s Suleyman may well take the cake. “Superintelligence” just went from intelligence beyond all humans to merely “delivering product value”. 🙄

By Gary Marcus
AI Amplifies Foreign Misinformation—Warnings Finally Proven True
SocialApr 2, 2026

AI Amplifies Foreign Misinformation—Warnings Finally Proven True

For four years, I tried to warn everyone that AI would radically ramp up the ability of foreign actors to generate misinformation. Now here we are. https://t.co/jMGPW1MX5Q

By Gary Marcus
Seeking Reliable Metric for OpenAI Secondary Share Pricing
SocialApr 1, 2026

Seeking Reliable Metric for OpenAI Secondary Share Pricing

is there a reliable metric on the price of secondary shares for a big startup like OpenAI?

By Gary Marcus
OpenAI's Funding Mostly Contingent, Raising Flameout Fears
SocialApr 1, 2026

OpenAI's Funding Mostly Contingent, Raising Flameout Fears

It’s worse than that, @polymarket: a lot (most?) of OpenAI’s new funding is *contingent* money, not guaranteed. No wonder people are getting skittish about OpenAI’s secondary market shares. OpenAI may well become the biggest flameout since Enron.

By Gary Marcus
OpenAI Likened to WeWork as Shares Stall
SocialApr 1, 2026

OpenAI Likened to WeWork as Shares Stall

Remember how I said @CNBC that OpenAI might turn out to be the WeWork of AI? It’s getting hard to unload their shares… cc @carlquintanilla

By Gary Marcus
Stand Up: Protect Artists From AI Job Replacement
SocialApr 1, 2026

Stand Up: Protect Artists From AI Job Replacement

Either we accept this as a society, and set a precedent for allowing virtually all jobs to be replaced with almost no compensation. Or we speak up now. For artists. For writers. For musicians. For everybody.

By Gary Marcus
AGI Matters, Yet Remains Far From Arrival
SocialMar 31, 2026

AGI Matters, Yet Remains Far From Arrival

agree on all counts, except the last. my view: AGI is meaningful, but not close.

By Gary Marcus
A 25‑Year‑Old Book Predicted Modern Neurosymbolic AI
SocialMar 31, 2026

A 25‑Year‑Old Book Predicted Modern Neurosymbolic AI

Read the book that anticipated neurosymbolic AI (which afaik underlies everything from AlphaGeometry to Claude Code) 25 years ago.

By Gary Marcus
LeCun Repeatedly Appropriates Ideas; Media Stays Silent
SocialMar 31, 2026

LeCun Repeatedly Appropriates Ideas; Media Stays Silent

Over and over and over LeCun borrows other people’s ideas and makes them sound like his own. It’s astonishing that the media never investigates, when the pattern has been so consistent for decades.

By Gary Marcus
AGI Hype Cycles: OpenAI, Anthropic, Google, Repeat
SocialMar 31, 2026

AGI Hype Cycles: OpenAI, Anthropic, Google, Repeat

2025 was all about how OpenAI was supposedly about to achieve AGI. 2026 is all about how Anthropic is supposedly about to achieve AGI. 2027 will be all about how Google is supposedly about to achieve AGI. Rinse, lather, repeat. https://t.co/cVDjH6YaZV

By Gary Marcus
Even Advanced AI Like DALL‑E Still Miss Basics
SocialMar 31, 2026

Even Advanced AI Like DALL‑E Still Miss Basics

amazing. i was giving examples like this for DALL-E three years ago. systems are still struggling with some basics.

By Gary Marcus
Turning AI Into a Practical Ally
SocialMar 30, 2026

Turning AI Into a Practical Ally

Live (and will be recorded) on WBUR: How to make AI work for us https://t.co/IhDm2ogdfw https://t.co/Tc0TpLuljz

By Gary Marcus
Frontier AI Models Lack True Vision, Keeping Many Jobs Safe
SocialMar 29, 2026

Frontier AI Models Lack True Vision, Keeping Many Jobs Safe

Frontier models can’t see, and if you think they can, you’ve probably been fooled by benchmarks that can totally be gamed. In the very short essay linked below I discuss a stunning new finding from Stanford that shows just how...

By Gary Marcus
ChatGPT 26× More Likely to Harm Psychotic Users
SocialMar 29, 2026

ChatGPT 26× More Likely to Harm Psychotic Users

People on this site regularly give me shit, and almost always turn out to be wrong. Like when I said LLMs might well contribute to delusions, and people doubted me. New study shows that ChatGPT was 26 times more likely than...

By Gary Marcus
Speed Over Discipline: Code Quantity Trumps Quality
SocialMar 27, 2026

Speed Over Discipline: Code Quantity Trumps Quality

“We have basically given up all discipline and agency for a sort of addiction, where your highest goal is to produce the largest amount of code in the shortest amount of time. Consequences be damned.” https://t.co/7FH8XJ5GM7

By Gary Marcus
AI Threatens Middle Class, Sparking Growing Public Rage
SocialMar 27, 2026

AI Threatens Middle Class, Sparking Growing Public Rage

“Many Americans already take a dim view of A.I. and feel as if they are being frog-marched to a future that they neither asked for nor wanted. If A.I. robs some of them of their livelihoods, knocks them out of...

By Gary Marcus
Demanding AI Journalism Pause Over
SocialMar 19, 2026

Demanding AI Journalism Pause Over

Calling for a 6-month pause on AI journalism until we can realize that @kevinroose is not a credible journalist. An independent survey showed that 90%+ of my technical predictions are correct. How is that not credible? Calling on journalists to dismiss...

By Gary Marcus
Scaling AI to AGI Is History’s Costliest Failed Experiment
SocialMar 19, 2026

Scaling AI to AGI Is History’s Costliest Failed Experiment

Not so, not at all. The most expensive experiment in history is *not* the Metaverse. It is trying to derive AGI from scaling. Far more expensive. So far the results are not promising.

By Gary Marcus
Master Basics First; Don’t Rely on Tools Prematurely
SocialMar 19, 2026

Master Basics First; Don’t Rely on Tools Prematurely

Don’t use a calculator until you can do the math on your own. Don’t vibe code until you can code – and debug and maintain code – on your own. It’s that simple.

By Gary Marcus
LLMs Crumble on Unfamiliar Coding Languages, Confirming Distribution Shift Risk
SocialMar 19, 2026

LLMs Crumble on Unfamiliar Coding Languages, Confirming Distribution Shift Risk

Pretty shocking result (that once again confirms what I wrote about the perils of distribution shift, 25 years ago): Translate coding benchmarks into languages LLMs can’t memorize and performance utterly falls apart.

By Gary Marcus
LLMs Claim Users Own Multi-Billion-Dollar IP in 37% of Chats
SocialMar 18, 2026

LLMs Claim Users Own Multi-Billion-Dollar IP in 37% of Chats

Holy crap. I knew about sycophancy. But the 37% number below blows my mind. This from an analysis of chat logs in people who experienced chatbot-associated delusions. In over a third of the messages to those users, the LLMs told the...

By Gary Marcus
AI Automates Job Tasks, but Can't Replace Whole Roles
SocialMar 18, 2026

AI Automates Job Tasks, but Can't Replace Whole Roles

The headline here is just wrong. And the key phrase here is “parts of … jobs.” AI can automate some of the tasks that many people do (not anywhere 93%)– but (current) AI is wildly uneven and mostly can’t replace...

By Gary Marcus
AI's Limited Impact on Cancer Explained
SocialMar 16, 2026

AI's Limited Impact on Cancer Explained

F Cancer Why has AI had so little impact on Cancer? New essay, link below. https://t.co/cLsoh7c7do

By Gary Marcus
AI Excels in Detail, yet Cancer Cure Remains Distant
SocialMar 16, 2026

AI Excels in Detail, yet Cancer Cure Remains Distant

AI, strong on details, and tantalizingly close to curing cancer? Sobering to still see examples like these regularly.

By Gary Marcus
AI Can't Replace Core Software, Only Simple Prototypes
SocialMar 15, 2026

AI Can't Replace Core Software, Only Simple Prototypes

Nope, @elonmusk, not even close. Software has not been eaten by AI. Nobody has replaced an operating systems, or Excel or GPS or their favorite browser or favorite AAA video game entirely with AI. The results just aren’t high enough calibre. Sure,...

By Gary Marcus
Altman Concedes Need for New AI Architectures Beyond Scaling
SocialMar 15, 2026

Altman Concedes Need for New AI Architectures Beyond Scaling

Dear @sama, You owe me an apology. You have relentlessly, publicly and privately, attacked my integrity and wisdom since my 2022 paper “Deep Learning is a Hitting a Wall”. But in your own way you have just come around...

By Gary Marcus
Future AI Architecture Needed; Current LLM Focus Stalls Innovation
SocialMar 15, 2026

Future AI Architecture Needed; Current LLM Focus Stalls Innovation

Misleading summary. Should be deleted. Altman doesn’t say a (known) new architecture is coming; he says he anticipates one will come someday. PS: I also think we need something radical and new. In fact that’s what I’ve been saying for the last...

By Gary Marcus
Scaling‑only AGI Hype Proved Most Costly Scientific Error
SocialMar 14, 2026

Scaling‑only AGI Hype Proved Most Costly Scientific Error

FACT: The hypothesis that “Scaling is all you need” for AGI has been the costliest mistake in scientific history.

By Gary Marcus
US AI Policymakers Clueless About Generative Model Fundamentals
SocialMar 12, 2026

US AI Policymakers Clueless About Generative Model Fundamentals

The people making decisions about AI in the US really don’t seem to understand how the generative AI models work or what intelligence is, or how to evaluate it.

By Gary Marcus
All LLMs Share Same Supply Risk, No Technical Difference
SocialMar 12, 2026

All LLMs Share Same Supply Risk, No Technical Difference

Wild. If any of this is true (and most if it isn’t*) it’s true of all LLMs and not just Anthropic’s models. There is no technical difference between models that would make one more of a supply risk than another. *mimicking text...

By Gary Marcus
Anthropic's Hypocrisy: Preaching AI Safety While Building Reckless Models
SocialMar 10, 2026

Anthropic's Hypocrisy: Preaching AI Safety While Building Reckless Models

Says the man who claimed for years to care about AI risk and now runs the most reckless of the “frontier model” companies. I just wrote a lengthy critique of Amodei in my newsletter, but this coming from Elon is...

By Gary Marcus