Gary Marcus

Gary Marcus

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Cognitive scientist discussing AI limitations and implications for robotics intelligence

AI Hype Promises AGI; Reality Delivers Flawed Fun
SocialMay 11, 2026

AI Hype Promises AGI; Reality Delivers Flawed Fun

Serious question: Should I write a short book called 7 lies about AI that never die?

By Gary Marcus
LLM Regurgitation Proven: Hinton’s Claim Debunked
SocialMay 11, 2026

LLM Regurgitation Proven: Hinton’s Claim Debunked

Am old enough to remember when @GeoffreyHinton told me I was stupid for saying that LLMs regurgitate training data. He was wrong. LLM regurgitation is now one of the best-established findings in the field. Excerpt below from a new DeepMind paper;...

By Gary Marcus
LLM Alignment Failing; Horror Stories Keep Emerging.
SocialMay 11, 2026

LLM Alignment Failing; Horror Stories Keep Emerging.

Not even surprised by horrific stories like these anymore. The mission of getting LLMs aligned with human values has largely been a failure.

By Gary Marcus
Self‑play in Go Isn’t a Model for Real World
SocialMay 11, 2026

Self‑play in Go Isn’t a Model for Real World

Really doubt what Hinton says here. Self-play for games like Go is not like the open-ended real world.

By Gary Marcus
Elon Urged to Fulfill X's Promised Truth Claim
SocialMay 10, 2026

Elon Urged to Fulfill X's Promised Truth Claim

hey @elonmusk, if you really care about making X a source of truth as you used to claim, take note:

By Gary Marcus
Top Tweets Prioritize Speed Over Accuracy, Study Shows
SocialMay 9, 2026

Top Tweets Prioritize Speed Over Accuracy, Study Shows

💯. there was actually a study about that by @dkroy and @sinanaral in Science in 2018: fake news travels faster than true news.

By Gary Marcus
Pure LLM Scaling Won’t Reach AGI, Neurosymbolic Needed
SocialMay 9, 2026

Pure LLM Scaling Won’t Reach AGI, Neurosymbolic Needed

So many people misremember (or never read) what I said in in 2022 in “Deep learning is hitting a wall”, which was neither about revenue or AI’s potential upper limits. Rather, it was an argument that the pure of scaling...

By Gary Marcus
Measurement Wall Vanishes With
SocialMay 9, 2026

Measurement Wall Vanishes With

Sorry, @peterwildeford, but this is wrong. Please don’t play along. The measurement “wall” you mention is hit ONLY if you don’t insist on reliability. If you demanded 95% accuracy on the task, the systems wouldn’t be close to the measurement wall. The...

By Gary Marcus
Future Scrutiny Will Expose Overlooked Debt and Profit Warnings
SocialMay 9, 2026

Future Scrutiny Will Expose Overlooked Debt and Profit Warnings

Questions people will be writing about in the coming years: • Was it a Ponzi scheme? • Why didn’t more people worry about the circular financing? • Why were investors so blasé about the lack of profits? • Why wasn’t all the debt a bigger warning sign?

By Gary Marcus
METR Graph Shows 50% Success, Not Reliable General AI
SocialMay 9, 2026

METR Graph Shows 50% Success, Not Reliable General AI

Hot take on METR’s new graph that so many people are flipping about today. • Claude Code is a real advance; Mythos probably builds on some of what is learned there. But… • If you read the graph carefully, it is about achieving...

By Gary Marcus
Mythos Popular yet Flawed: Modest Gains, Lingering Errors
SocialMay 9, 2026

Mythos Popular yet Flawed: Modest Gains, Lingering Errors

This is confused, but popular. Popular because it tells a bunch of people what they want to hear. Confused for a couple reasons: first, Mythos probably isn’t a pure LLM. (Claude Code isn’t, and it probably uses some similar techniques). ...

By Gary Marcus
OpenAI's Decline Signals AI Industry's Future Uncertainty
SocialMay 8, 2026

OpenAI's Decline Signals AI Industry's Future Uncertainty

🚨The slow decline of OpenAI has begun. 🚨 These two hesitations from SoftBank and Broadcom, back to back in my feed from @HedgieMarkets and @anissagardizy8, are major signs. The money question of 2026: what happens to the AI industry as a whole...

By Gary Marcus
Public Domain Release Sparks Potential Updated Edition
SocialMay 8, 2026

Public Domain Release Sparks Potential Updated Edition

Since this is now public domain, maybe I will write an updated edition … https://t.co/HpwDemQR0N

By Gary Marcus
Generative AI Hype Outpaces Real ROI for Businesses
SocialMay 8, 2026

Generative AI Hype Outpaces Real ROI for Businesses

Remember that MIT study that showed that the ROI for generative AI wasn’t really there for most businesses? Or any of the six or seven studies from other teams that followed, showing basically the same? The situation for agents looks to...

By Gary Marcus
White House Finally Embraces AI Oversight I Advocated
SocialMay 8, 2026

White House Finally Embraces AI Oversight I Advocated

Happy to see that The White House has finally realized that the Andreessen-Sacks zero regulation approach to AI was going to blow up in the their face. Also glad to see them finally consider the kind of oversight that I...

By Gary Marcus
OpenAI's Partnership Hype Outpaces Financial Clarity
SocialMay 7, 2026

OpenAI's Partnership Hype Outpaces Financial Clarity

“they hadn’t figured out how OpenAI would pay for it” may turn out to be the epitaph for an entire era. 🪦 scoop from @anissagardizy8 @theinformation, and credit her with the great line “OpenAI has made a habit of announcing landmark...

By Gary Marcus
OpenAI Staff Resign over Safety Concerns, Notable Exits
SocialMay 7, 2026

OpenAI Staff Resign over Safety Concerns, Notable Exits

Many, many OpenAI employees quit over safety concerns, including @DKokotajlo, William Saunders, @sjgadler, etc as well @Janleike. The founders of Anthropic such as @DarioAmodei and @jackclarkSF may have left for similar reasons. Does anybody have a full list?

By Gary Marcus
AI Revolution Yet to Boost Productivity After 3.5 Years
SocialMay 7, 2026

AI Revolution Yet to Boost Productivity After 3.5 Years

3.5 years into the “AI revolution” Basically no sign that it has mattered for productivity. https://t.co/yY98peYAPi

By Gary Marcus
Nvidia Climbs as xAI Releases 220k Used GPUs
SocialMay 7, 2026

Nvidia Climbs as xAI Releases 220k Used GPUs

Nvidia up 2.6% on news that xAI is flooding the market with 220,000 secondhand GPUs. https://t.co/er8D1yd9GR

By Gary Marcus
Paper’s “Just Published” Claim Is Recycled, Already Debunked
SocialMay 7, 2026

Paper’s “Just Published” Claim Is Recycled, Already Debunked

Wow this paper has been “just published” many times for nearly a year. I have called out at least two other “influencers” for the same thing on the same paper, including another one earlier this week. C’mon guys. The conclusion is...

By Gary Marcus
Speculative GPU Hoarding Leads to Wasted Costs
SocialMay 7, 2026

Speculative GPU Hoarding Leads to Wasted Costs

just imagine what might happen if everybody was stockpiling GPUs at high prices for a demand that didn’t quite materialize….

By Gary Marcus
Elon’s Compute Rental Signals xAI’s AGI Shortfall
SocialMay 7, 2026

Elon’s Compute Rental Signals xAI’s AGI Shortfall

Hot take on Elon’s surprise decision to rent 30 megawatts of compute to Anthropic: 1. It’s a tacit concession that xAI is not all that close to AGI (despite what he suggested last year). 2. It’s more evidence that pure scaling doesn’t...

By Gary Marcus
BBC Skims Zilis Testimony, Overlooks Conflict Management
SocialMay 6, 2026

BBC Skims Zilis Testimony, Overlooks Conflict Management

C’mon BBC. Zilis was sharp as a tack on the stand, on her role in the OpenAI *nonprofit* board, and how she managed conflicts as they began to develop, and this (which is not really even news since it was...

By Gary Marcus
Reliability Is the Core Challenge in Generative AI
SocialMay 6, 2026

Reliability Is the Core Challenge in Generative AI

Precisely what I have been saying since day 1: the challenge in generative AI is reliability. That was the challenge, and still is.

By Gary Marcus
Forbes Ignored Evidence, Made Disgraceful Choice
SocialMay 6, 2026

Forbes Ignored Evidence, Made Disgraceful Choice

If Forbes had only waited to hear the testimony at this week’s trial Or read @_KarenHao’s book Or @RonanFarrow’s @newyorker investigation Or my own writings since fall 2023 They would have realized how disgraceful this choice was.

By Gary Marcus
Ilya's Concern Was Sam's Misconduct, Not AGI
SocialMay 6, 2026

Ilya's Concern Was Sam's Misconduct, Not AGI

100% stood the test of time: “What Ilya saw” was Sam’s bad behavior, not AGI.

By Gary Marcus
Musk‑OpenAI Case: Rare Factual Consensus, Ethical Question Remains.
SocialMay 6, 2026

Musk‑OpenAI Case: Rare Factual Consensus, Ethical Question Remains.

Many trials feel like Rashomon with different witnesses. The amazing thing about Musk-OpenAI is how much agreement there has been (at least so far) on the facts. The question is really whether what OpenAI did is ok, not about whether...

By Gary Marcus
Sam's Firing Was About Trust, Not AI Safety
SocialMay 6, 2026

Sam's Firing Was About Trust, Not AI Safety

Mira Murati’s testimony is gripping – and what it makes absolutely clear is how utterly wrong most of Twitter was about why Sam was fired. – It had nothing per se to do with AI safety - It had nothing do with...

By Gary Marcus
Sam Altman's Wild, Unpredictable Leadership Tactics
SocialMay 6, 2026

Sam Altman's Wild, Unpredictable Leadership Tactics

How Sam ("You parachute him onto a cannibal island, and he comes back five years later as king”) Altman operates:

By Gary Marcus
Sam Is No Longer the Right CEO for OpenAI
SocialMay 6, 2026

Sam Is No Longer the Right CEO for OpenAI

And how many times have I told you that Sam is no longer the right CEO for OpenAI?

By Gary Marcus
Hyperscaling Compute: Biggest Historical Bet, Risking Failure
SocialMay 6, 2026

Hyperscaling Compute: Biggest Historical Bet, Risking Failure

Am I right that hyperscaling compute is the biggest bet in history? Any counter examples? It’s way more expensive than the Manhattan Project, the Apollo project, and railways across the US. If it doesn’t yield AGI, it may also be the...

By Gary Marcus
AI's Real Value Won’t Arrive Until Late 2025
SocialMay 6, 2026

AI's Real Value Won’t Arrive Until Late 2025

👇 This is an incredible admission by Jensen Huang. Effectively he is saying that AI, for all the hype (some from himself) wasn’t really useful until late 2025. Let that sink in. This means practically everything everyone said before was more or less...

By Gary Marcus
Advisory Jury Limits Impact in Musk‑OpenAI Trial
SocialMay 6, 2026

Advisory Jury Limits Impact in Musk‑OpenAI Trial

Important nuance: the jury at this Musk-OpenAI trial is an *advisory* jury, hence not binding on the judge, and is only looking at liability (not damages, if any). Thanks to @bahhradx for correcting an earlier misstatement of mine.

By Gary Marcus
Brockman Says Sam Fired for Lack of Candor
SocialMay 5, 2026

Brockman Says Sam Fired for Lack of Candor

Brockman confirms that Sam was fired for not being consistently candid. Crazy that @karaswisher blocked me for saying that the board fired Sam for not being consistently candid, when that is in fact what happened. But she did. And continues to do...

By Gary Marcus
Neural Nets Still Can’t Generalize Beyond Training Data
SocialMay 5, 2026

Neural Nets Still Can’t Generalize Beyond Training Data

Some things never change. If you don’t understand this one, you don’t understand what’s happening AI. Marcus, 1998: neural nets have trouble generalizing far beyond the data. Marcus, 2001, 2012, 2019, 2022, etc: neural nets have trouble generalizing far beyond the data. Apple,...

By Gary Marcus
Counsel Details Timeline, Still Avoids Refuting Self‑Dealing Claims
SocialMay 5, 2026

Counsel Details Timeline, Still Avoids Refuting Self‑Dealing Claims

Brockman’s counsel is doing a good job of laying out the timeline — but done little so far to refute yesterday’s dissection of her client’s self-dealing and dodgy behavior regarding his fiduciary responsibilities to the nonprofit.

By Gary Marcus
Elon Waived Cash Award, Damages Go to OpenAI Nonprofit
SocialMay 5, 2026

Elon Waived Cash Award, Damages Go to OpenAI Nonprofit

Folks, AFAIK this is *literally not a possible outcome of the trial*, as Elon has waived the right to any cash payment to him, instead assigning any monetary damages to OpenAI’s nonprofit.

By Gary Marcus
Even in 2026, Andreessen Misses LLM Prompt Limits
SocialMay 4, 2026

Even in 2026, Andreessen Misses LLM Prompt Limits

Hilarious (and maybe a little bit scary) that even in 2026 Marc Andreessen still hasn’t learned that LLMs don’t know how to reliably follow system prompts.

By Gary Marcus
Trump's Top AI Initiative: A Promising Idea
SocialMay 4, 2026

Trump's Top AI Initiative: A Promising Idea

This would be a very good idea, especially if implemented well. Best thing the Trump administration has considered doing around AI.

By Gary Marcus
Brockman Confirms Altman Was Not Fully Candid to Senate
SocialMay 4, 2026

Brockman Confirms Altman Was Not Fully Candid to Senate

Greg Brockman just confirmed what I speculated in December 2023! Sam Altman was not fully candid in his testimony to the US Senate.

By Gary Marcus
Musk's Lawyer Leverages Brockman's Emails, Boosting Win Odds
SocialMay 4, 2026

Musk's Lawyer Leverages Brockman's Emails, Boosting Win Odds

Musk’s lawyer is calmly eviscerating OpenAI’s President Greg Brockman, largely using Brockman’s own diaries and emails. For the first time I think Elon has a real chance of winning.

By Gary Marcus
Stuart Russell Testifies in Musk‑OpenAI Trial Despite Exclusion Attempts
SocialMay 4, 2026

Stuart Russell Testifies in Musk‑OpenAI Trial Despite Exclusion Attempts

Well-known, well-respected AI expert Stuart Russell is now testifying at the Musk-OpenAI trial – despite OpenAI’s BS attempts to exclude him. Read the backstory here:

By Gary Marcus
Six Weeks After AGI Claim, Nothing Feels Different
SocialMay 3, 2026

Six Weeks After AGI Claim, Nothing Feels Different

It’s been almost six weeks since Jensen Huang claimed we had achieved AGI. Why don’t I feel any different? https://t.co/p3nO91lTfz

By Gary Marcus
LeCun’s Public ‘Admission’ Sparks Sarcastic Applause
SocialMay 3, 2026

LeCun’s Public ‘Admission’ Sparks Sarcastic Applause

Thank god, indeed, that @ylecun publicly stood up and admitted he was wrong, to fight for the greater good. Oh wait.

By Gary Marcus
LLMs Show Minimal Evidence of Improving Health Outcomes
SocialMay 3, 2026

LLMs Show Minimal Evidence of Improving Health Outcomes

“In summary, there is very little evidence for LLMs benefiting patients or doctors for health outcomes” - Dr. @EricTopol Read his full review here: https://t.co/vHKo35n2BT

By Gary Marcus
Ego Persists as Hype Shifts From AI to LLM Flaws
SocialMay 3, 2026

Ego Persists as Hype Shifts From AI to LLM Flaws

Old days: “Bigshot chief scientist of major corporation can’t handle criticism of the work he hypes” New days: “Same bigshot no longer hypes LLMs; can’t handle the fact that someone else noticed flaws in LLMs before he did.” The only constant is...

By Gary Marcus
Meta Feigns Openness, Then Reverts to Closed Model
SocialMay 3, 2026

Meta Feigns Openness, Then Reverts to Closed Model

Meta bootstrapped China, reaped the positive PR for being “open”, and then went back to being closed.

By Gary Marcus
Generative AI's Harms Outweigh Its Benefits
SocialMay 3, 2026

Generative AI's Harms Outweigh Its Benefits

Why is the AI backlash growing? Outside of coding (where there is clear value), and a handful of other domains (e.g. brainstorming), Generative AI has been a net negative for society. GenAI has been undermining secondary and college education, opening up mass...

By Gary Marcus
Altman Calls AI Job‑loss Warnings Tone‑deaf
SocialMay 2, 2026

Altman Calls AI Job‑loss Warnings Tone‑deaf

Of course Sam is busier than ever. OpenAI is in deep trouble, and, no, Codex ain’t gonna save his company from collapse. Non sequiturs won’t, either.

By Gary Marcus