Gary Marcus (@GaryMarcus) on X (Twitter)

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Gary Marcus is a creator on X (Twitter) in the 200K–300K follower range, publishing for AI researchers, technologists, and policy advocates concerned about the risks and limitations of current generative AI, especially those skeptical of hype around LLMs and focused on long-term AI safety and robustness. Profile last checked 2026-07-05.

Observed facts (from the public profile):

Profile bio

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

What this creator posts about, and who reads it (AI-inferred)

Recurring topics: AI cost and ROI failures, Limitations of current LLMs and scaling, Neurosymbolic AI and world models, AI policy and regulation, Critiques of AGI claims

Audience: AI researchers, technologists, and policy advocates concerned about the risks and limitations of current generative AI, especially those skeptical of hype around LLMs and focused on long-term AI safety and robustness

Provenance: inferred by AI from public content, not stated by the creator — confidence 0.40 · read from 8 recent posts · updated 21 days ago.

Audience read from this creator’s own recent posts, not from platform-declared categories. It is our reading, and it can be wrong.

Recent content samples (what the inference above was drawn from)

“AI is now costing some companies more than the people it was supposed to replace.”

and vice versa @yudapearl!!

If this doesn’t chill you, I don’t know what will. 😱 “A president with the authority that Trump is now asserting could in theory put the world’s most powerful AI to repressive ends while at the same time keeping it off…

Indeed: if we actually had AGI we would not need forward deployed engineers.

See the original post on X (Twitter)

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