Ever wondered what makes language models generate overly verbose, vague, or sycophantic responses? Our new paper investigates these and other idiosyncratic biases in preference models, and presents a simple post-training recipe to mitigate them! Thread below 🧵↓

Extremely excited to announce that I will be joining @utaustin.bsky.social Computer Science in August 2025 as an Assistant Professor! 🎉

What does it mean for #LLM output to be novel? In work w/ johnchen6.bsky.social, Jane Pan, Valerie Chen and He He, we argue it needs to be both original and high quality. While prompting tricks trade one for the other, better models (scaling/post-training) can shift the novelty frontier 🧵

How do language models organize concepts and their properties? Do they use taxonomies to infer new properties, or infer based on concept similarities? Apparently, both! 🌟 New paper with my fantastic collaborators @amuuueller.bsky.social and @kanishka.bsky.social

If you are at #NAACL2025 @naaclmeeting.bsky.social catch @juand-r.bsky.social presenting our poster on the interplay between similarity and category membership in the property inferences of LMs @ Poster Session 1 on Wednesday! Or if you're at home like me, read our paper: arxiv.org/abs/2410.22590

🚀Meet CRUST-Bench, a dataset for C-to-Rust transpilation for full codebases 🛠️ A dataset of 100 real-world C repositories across various domains, each paired with: 🦀 Handwritten safe Rust interfaces. 🧪 Rust test cases to validate correctness. 🧵[1/6]

Evaluating language model responses on open-ended tasks is hard! 🤔 We introduce EvalAgent, a framework that identifies nuanced and diverse criteria 📋✍️. EvalAgent identifies 👩‍🏫🎓 expert advice on the web that implicitly address the user’s prompt 🧵👇

One of the ways that LLMs can be inconsistent is the "generator-validator gap," where LLMs deem their own answers incorrect. 🎯 We demonstrate that ranking-based discriminator training can significantly reduce this gap, and improvements on one task often generalize to others! 🧵👇

1.) [NAACL 25] @kanishka.bsky.social, @amuuueller.bsky.social and I delve into how language models do property inheritance using behavioral and mechanistic analyses. Thank you, Kanishka and Aaron. I could not have hoped for better collaborators! arxiv.org/abs/2410.22590 [👇 bsky.app/profile/juan...

LLM judges have become ubiquitous, but valuable signal is often ignored at inference. We analyze design decisions for leveraging judgment distributions from LLM-as-a-judge: 🧵 (w/ Michael J.Q. Zhang, @eunsol.bsky.social)

Do you want to know what information LLMs prioritize in text synthesis tasks? Here's a short 🧵 about our new paper, led by Jan Trienes: an interpretable framework for salience analysis in LLMs. First of all, information salience is a fuzzy concept. So how can we even measure it? (1/6)

⚠️Current methods for generating instruction-following data fall short for long-range reasoning tasks like narrative claim verification. We present CLIPPER ✂️, a compression-based pipeline that produces grounded instructions for ~$0.5 each, 34x cheaper than human annotations.

Excited that this got accepted at naacl/@naaclmeeting.bsky.social 2025! Massive kudos to Juan Diego and Aaron for being the best co-authors and colleagues one could ask for! 🙏

I'm at #Neurips2024 this week! My work (arxiv.org/abs/2406.17692) w/ @gregdnlp.bsky.social & @eunsol.bsky.social exploring the connection between LLM alignment and response pluralism will be at pluralistic-alignment.github.io Saturday. Drop by to learn more!

I've spent the last two years scouring all available resources on RLHF specifically and post training broadly. Today, with the help of a totally cracked team, we bring you the fruits of that labor — Tülu 3, an entirely open frontier model post training recipe. We beat Llama 3.1 Instruct. Thread.

We at UT Linguistics are hiring for 🔥 2 faculty positions in Computational Linguistics! Assistant or Associate professors, deadline Dec 1. UT has a super vibrant comp ling & #nlp community!! Apply here 👉 apply.interfolio.com/158280

1/ Introducing ᴏᴘᴇɴꜱᴄʜᴏʟᴀʀ: a retrieval-augmented LM to help scientists synthesize knowledge 📚 @uwnlp.bsky.social & Ai2 With open models & 45M-paper datastores, it outperforms proprietary systems & match human experts. Try out our demo! openscholar.allen.ai

Excited to share our updated preprint (w/ Jifan Chen, @jessyjli.bsky.social , @gregdnlp.bsky.social ) 📜 arxiv.org/pdf/2305.147... We show that LLMs can help understand nuances of annotation: they can convert the expressiveness of natural language explanations to a numerical form. 🧵