Log inSign up
Valentin Hofmann
384 posts
@vjhofmann

Valentin Hofmann

@vjhofmann
Assistant Professor @CisLMU @LMU_Muenchen | Formerly @allen_ai @uwnlp @UniofOxford @stanfordnlp @GoogleDeepMind
valentinhofmann.github.io
Joined February 2020
286
Following
1,622
Followers
RepliesRepliesRepostsRepostsMediaMedia

Log in or sign up for X

See what’s happening and join the conversation

Continue with phone
or
Log in with username or email
Terms·Privacy·Cookies·Accessibility·Ads Info·© 2026 X Corp.
  • Pinned
    @vjhofmann
    Valentin Hofmann
    @vjhofmann
    Mar 4, 2024
    💥 New paper 💥 We discover a form of covert racism in LLMs that is triggered by dialect features alone, with massive harms for affected groups. For example, GPT-4 is more likely to suggest that defendants be sentenced to death when they speak African American English. 🧵
    Image
    74
  • @vjhofmann
    Valentin Hofmann
    @vjhofmann
    Jun 18
    📢 We're hiring a PhD student in tokenizer-free foundation models! The position will have a double affiliation with @LMU_Muenchen and @utn_nuremberg, co-supervised by @y_m_asano and me. Come work with us in Munich and Nuremberg! 👇
    Image
    Image
    4
  • @vjhofmann
    Valentin Hofmann
    @vjhofmann
    Mar 24
    Audio LLMs improve access, but speech carries identity cues users can't easily mask. We find these cues create new pathways for AI bias, complicating the fairness gains of accessibility. Really enjoyed working on this w/ great team led by @CarolinHolterm and @minhducbui_nlp! 👇
    @CarolinHolterm
    Carolin Holtermann
    @CarolinHolterm
    Mar 24
    🚨 New paper alert: A new generation of LLMs can now process speech natively. This could expand access for millions excluded by text interfaces, but our research shows a cost: demographic cues in speaker voice can trigger stereotypical model responses. 🎙️⚖️
    Image
  • @vjhofmann
    Valentin Hofmann
    @vjhofmann
    Mar 3
    📢 Life update 📢 After a wonderful time at @allen_ai, I've joined @CisLmu at @LMU_Muenchen as a tenure-track assistant professor in NLP. Thrilled to be back in Europe and to start a lab in Munich's flourishing AI ecosystem! 🎉
    Image
    38
  • @vjhofmann
    Valentin Hofmann
    @vjhofmann
    Dec 15, 2025
    Meet Bolmo, a byte-level LM matching or surpassing subword LMs across tasks. We built Bolmo via a new *byteification* method that replaces the subword tokenizer in a trained LM with byte encoder/decoder modules. Led by amazing @bminixhofer. 👇
    @bminixhofer
    Benjamin Minixhofer
    @bminixhofer
    Dec 15, 2025
    We are releasing Bolmo today! Bolmo is the best byte-level model so far. It comes close to and sometimes surpasses Olmo 3. Bolmo also performs competitively in terms of speed & is fully open. I was skeptical of byte-level models for a long time but I finally switched camps🧵
    Image
    1
Advertisement
Advertisement