Very excited to give an oral talk at ICLR this Saturday at 10:30 AM! We show that masked diffusion language models are computationally equivalent to looped transformers, and can solve anything chain of thought can; sometimes even faster, thanks to parallelism. Paper: arxiv.org/abs/2510.13117

Introducing Olmo Hybrid, a 7B fully open model combining transformer and linear RNN layers. It decisively outperforms Olmo 3 7B across evals, w/ new theory & scaling experiments explaining why. 🧵

Andy Yang, Christopher Watson, Anton Xue, Satwik Bhattamishra, Jose Llarena, William Merrill, Emile Dos Santos Ferreira, Anej Svete, David Chiang: The Transformer Cookbook https://arxiv.org/abs/2510.00368 https://arxiv.org/pdf/2510.00368 https://arxiv.org/html/2510.00368

We present The Transformer Cookbook: a collection of recipes for programming algorithms directly into transformers! Hungry for an induction head? Craving a Dyck language recognizer? We show you step-by-step how to cook up transformers for these algorithms and many more!

The Transformer Cookbook

We present the transformer cookbook: a collection of techniques for directly encoding algorithms into a transformer's parameters. This work addresses the steep learning curve of such endeavors, a prob...

arxiv.org

Introducing Asta—our bold initiative to accelerate science with trustworthy, capable agents, benchmarks, & developer resources that bring clarity to the landscape of scientific AI + agents. 🧵

As part of Asta, our initiative to accelerate science with trustworthy AI agents, we built AstaBench—the first comprehensive benchmark to compare them. ⚖️

Ai2 is excited to be at #ACL2025 in Vienna, Austria this week. Come say hello, meet the team, and chat about the future of NLP. See you there! 🤝📚

We are #1 on the @huggingface heatmap - this is what true openness looks like!🥇🎉 750+ models 230+ datasets And counting... Come build with us huggingface.co/spaces/cfahl...

Model Release Heatmap - a Hugging Face Space by cfahlgren1

Search this app to see model release activity for any Hugging Face organization or user over time. Just enter the org name to view their heatmap.

huggingface.co

🧵 Excited to share our paper "Unique Hard Attention: A Tale of Two Sides" with Selim, Jiaoda, and Ryan, where we show that the way transformers break ties in attention scores has profound implications on their expressivity! And it got accepted to ACL! :) The paper: arxiv.org/abs/2503.14615

Unique Hard Attention: A Tale of Two Sides

Understanding the expressive power of transformers has recently attracted attention, as it offers insights into their abilities and limitations. Many studies analyze unique hard attention transformers...

arxiv.org

Current KL estimation practices in RLHF can generate high variance and even negative values! We propose a provably better estimator that only takes a few lines of code to implement.🧵👇 w/ @xtimv.bsky.social and Ryan Cotterell code: arxiv.org/pdf/2504.10637 paper: github.com/rycolab/kl-rb

I will be at #NeurIPS2024 in Vancouver. I am excited to meet people working on AI Safety and Security. Drop a DM if you want to meet. I will be presenting two (spotlight!) works. Come say hi to our posters.

No joke, FLaNN is one of the most interesting servers around. Check out the website for talk information! flann.super.site

William Merrill@lambdaviking.bsky.social · 2y ago

A starter pack for research on Formal Languages and Neural Networks! go.bsky.app/eKG7Ua

Happy to share our work "Counterfactual Generation from Language Models" with @AnejSvete, @vesteinns, and Ryan Cotterell! We tackle generating true counterfactual strings from LMs after interventions and introduce a simple algorithm for it. (1/7) arxiv.org/pdf/2411.07180