Nelson Elhage
I'm currently an engineer and researcher at Anthropic. I currently work on our pretraining team; before that I worked on reverse-engineering large language models. You can read that team's research . Previously, I've worked at: As a personal project, I've put together livegrep.com, a site which allows for realtime regex searching of the Linux kernel as-you-type, using Russ Cox's RE2 regex library, and a custom indexing backend. It's open-source and you can deploy it for your own source code! It's also one of the backends for Mozilla's SearchFox. I write at a number of online venues. You can find stuff I've written at: I've previously done some security work for various open-source projects, including the Linux kernel and KVM. I presented at Black Hat USA 2011 about some work I have done on KVM. My slides and code for that talk are now available online.
Work Previously, I've worked at: Anthropic, where I worked on interpretability of large language models, and a number of other projects. You can read a number of publications I contributed to on the Interpretability team's website.. Stripe, where I worked on a variety of projects and teams, including as a founding member of the Sorbet project. Ksplice (and, post-acquisition, Oracle) working on the Ksplice technology and product for updating the Linux kernel without rebooting. livegrep As a personal project, I've put together livegrep.com, a site which allows for realtime regex…
saved by
related reading
- Tristan's Site - Tristan Humethume.ca
- Neil Rathics.stanford.edu
- Composer2.pdfcursor.com
- thesephist.comthesephist.com
- Transformer Circuits Threadtransformer-circuits.pub
- ProgramBenchprogrambench.com
- Here’s how I use LLMs to help me write codesimonwillison.net
- Introducing SWE-grep and SWE-grep-mini: RL for Multi-Turn, Fast Context Retrieval | Cognitioncognition.ai
- KernelBench: Can LLMs Write GPU Kernels?scalingintelligence.stanford.edu
- How Compiler Explorer Works in 2025 — Matt Godbolt’s blogxania.org
- Non_Interactive – Software & MLnonint.com
- Tips and Code for Empirical Research Workflows — AI Alignment Forumalignmentforum.org