Gary Marcus (@GaryMarcus) / X

Gary Marcus

59K posts

Gary Marcus

@GaryMarcus

OG GenAI Skeptic; spoke at US Senate. Warned about hallucinations in 2001. Advocating world models & neurosymbolic AI ever since. Author, Marcus on AI & 6 books

garymarcus.substack.com

Joined December 2010

Pinned
Gary Marcus
@GaryMarcus
Aug 31, 2025
Three thoughts on what really matters: 1. Fuck cancer 2. Friends are irreplaceable 3. The new "Marcus test" for AI is when AI makes a significant dent on cancer May that happen sooner, much sooner, rather than later. In memory of my childhood friend Paul.
560K
Gary Marcus
@GaryMarcus
Oct 22, 2025
Absolutely the most important satire of the LLM era.
Christian Keil
@pronounced_kyle
Mar 16, 2024
My 3-month-old son is now TWICE as big as when he was born. He's on track to weigh 7.5 trillion pounds by age 10
3.9M
Gary Marcus
@GaryMarcus
Jun 4, 2025
I never thought I would live to see the President of the United States serving as Russia’s Press Secretary.
817K
Gary Marcus
@GaryMarcus
Nov 1, 2024
⚠️⚠️⚠️ I have a PhD in Brain and cognitive science, from MIT. 𝗜𝗻 𝗷𝘂𝘀𝘁 𝘁𝗵𝗲 𝗹𝗮𝘀𝘁 𝟮𝟰 𝗵𝗼𝘂𝗿𝘀, 𝗜 𝗵𝗮𝘃𝗲 𝘀𝗲𝗲𝗻 𝟰 𝘀𝗶𝗴𝗻𝘀 𝗼𝗳 𝗯𝗿𝗮𝗶𝗻 𝗱𝗮𝗺𝗮𝗴𝗲 𝗮𝗻𝗱/𝗼𝗿 𝗱𝗲𝗴𝗲𝗻𝗲𝗿𝗮𝘁𝗶𝗼𝗻 𝗶𝗻 𝗧𝗿𝘂𝗺𝗽: - 𝗠𝗼𝘁𝗼𝗿 𝗱𝗲𝗳𝗶𝗰𝗶𝘁: swaying, missing and
1.1M
Gary Marcus
@GaryMarcus
Feb 15, 2024
When I started working on AI four decades ago, it simply didn’t occur to me that one of the biggest use cases would be derivative mimicry, transferring value from artists and other creators to megacorporations, using massive amounts of energy. This is not the AI I dreamed of.
Ed Newton-Rex
@ednewtonrex
Feb 15, 2024
OpenAI just released a model that can generate 1-minute videos. You simply cannot argue that these models don't / won't compete with the content they're trained on, and the human creators behind that content. What is the model trained on? Did the training data providers consent
821K
Gary Marcus
@GaryMarcus
Oct 31, 2024
When LeCun is right, he’s right
262K
Gary Marcus
@GaryMarcus
Oct 21, 2024
Why Musk will sacrifice democracy and maybe even jail, in one convenient chart @nytimes
826K
Gary Marcus
@GaryMarcus
Nov 7, 2025
BREAKING: Leaked October 27 letter from OpenAI to White House shows that • OpenAI had begun asking for Federal guarantees over a week ago. • Sam’s long attempted walkback yesterday on X after the huge backlash was a total lie. You cannot trust this man, ever. That’s what
simp 4 satoshi
@iamgingertrash
Nov 7, 2025
Here is an OpenAI document submitted one week ago where they advocate for including datacenter spend within the “American manufacturing” umbrella There they specifically advocate For Federal loan guarantees Sam Lied to everyone, Again
Readers added context they thought people might want to knowReaders added context
1. This is not a "leak". OpenAI submitted a public interest comment to the White House. The document is published on OpenAI's website. cdn.openai.com/pdf/21b88bb5-1… 2. The document calls for expanding tax credits, and for loan guarantees for *manufacturers*. It does not propose a backstop for OAI's loans.
Context is written by people who use X, and appears when rated helpful by others. Find out more.
1.3M
Gary Marcus
@GaryMarcus
Mar 21, 2025
If you live in the U.S. your civil rights will soon be over. This is not a drill.
507K
Gary Marcus
@GaryMarcus
May 17, 2025
A computer scientist’s perspective on vibe coding:
832K
Gary Marcus
@GaryMarcus
Aug 3, 2024
I just wrote a great piece for WIRED predicting that the AI bubble will in collapse in 2025, and now I wish I hadn’t. Clearly, I got the year wrong. It’s going to be days or weeks from now, not months.
1.6M
Gary Marcus
@GaryMarcus
Feb 8, 2025
I retired from the American University system at age 49 (after 26 years) so have no direct stake in this. But am here to say that drastically cutting NIH & NSF funding and reducing grant “overhead” to 15% are among the dumbest ideas I have ever seen. America will never be the
621K
Gary Marcus
@GaryMarcus
Nov 6, 2025
Call your Congress people. Ten months almost to the day, OpenAI and NVidia have both rolled out *exactly* the “too big to fail .. but China” game plan I predicted they would be forced to. Our government is welching on food stamps but they are going to bail out the biggest
Gary Marcus
@GaryMarcus
Jan 6, 2025
The countdown until we are told that LLMs are “too big to fail” starts now. “We can’t afford to lose to China”, they will say, accepting their multibillion dollar bailouts.
324K
Gary Marcus
@GaryMarcus
Sep 11, 2025
Mark my words, this week marks peak bubble. Oracle just went up $300B on what appears to be a non-binding deal with OpenAI. •OpenAI doesn’t have $300 billion dollars •They don’t have anywhere near $300 billion dollars •By their own (presumably optimistic) projection, they
824K