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Keyon Vafa
1,435 posts
@keyonV

Keyon Vafa

@keyonV
Incoming assistant professor @UCBerkeley | Now @Harvard_Data & @bicyclesftmind @MIT | Prev PhD @Columbia | Researching AI/implicit world models
keyonvafa.com
Joined August 2011
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  • Pinned
    @keyonV
    Keyon Vafa
    @keyonV
    Jul 11, 2025
    Can an AI model predict perfectly and still have a terrible world model? What would that even mean? Our new ICML paper formalizes these questions One result tells the story: A transformer trained on 10M solar systems nails planetary orbits. But it botches gravitational laws 🧵
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  • @keyonV
    Keyon Vafa
    @keyonV
    Jul 14
    Thrilled to share I'll be joining UC Berkeley next year as an assistant professor in @UCBStatistics and affiliated with @Berkeley_EECS. My research will build methods to test/improve the implicit world models of AI systems, so that they reflect reality and human understanding.
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  • @keyonV
    Keyon Vafa
    @keyonV
    Jul 7
    Had a great time chatting with @TaliamSherman on her podcast Tomayto Tomahto. Check out her full series -- so many great guests and conversations, especially for someone who just graduated from college! open.spotify.com/episode/46tWNC….
    open.spotify.com
    Evaluating AI World Models w/ Keyon Vafa
    Tomayto Tomahto · Episode
  • @keyonV
    Keyon Vafa
    @keyonV
    Mar 17
    Really interesting work exploring whether/why next-token predictors would encode "useless" features
    @broccolitwit
    Mark Rofin
    @broccolitwit
    Mar 17
    1/ Did you ever look at some feature represented by a Transformer and wonder: "Why would it even learn that? 🤔 " We did! Announcing the ICLR'26 paper "Understanding the Emergence of Seemingly Useless Features in Next-Token Predictors"
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  • @keyonV
    Keyon Vafa
    @keyonV
    Dec 7, 2025
    I'll be speaking at the Language, Agent, and World Models (LAW) Workshop this afternoon at 2:15 in Upper Level Ballroom 20D!
    @LAW2025_NeurIPS
    LAW Workshop@NeurIPS 2025
    @LAW2025_NeurIPS
    Dec 5, 2025
    🔥 We are pleased to announce the talk title for our #LAW2025 #NeurIPS workshop Join us on 📅Sunday, Dec 7th in📍Upper Level Ballroom 20D Full schedule here: sites.google.com/view/law-2025/… We look forward to seeing you all this Sunday! #NeurIPS2025 #AI #ML #WorldModel #Agents #LLMs
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