📌📌📌 I'm excited to be on the faculty job market this fall. I just updated my website with my CV. stephencasper.com

Thanks to @stellaathena.bsky.social for chatting with me about Deep Ignorance: the new paper/project from Eleuther AI and the UK AISI. Bottom line: Worried AI could teach people to build bioweapons? Don’t teach it how fortune.com/2025/08/14/w...

This articles covers our work for a general audience. :)

Big and True :)

I like that OpenAI published this. They were able to fine-tune away GPT-oss's refusal, decreasing refusal rates to ~0%. These results aren't surprising. Acknowledging that existing safeguards don't generalize to open models is the first step in developing solutions. arxiv.org/abs/2508.031...

I've learned a lot over the past two years of getting into research, mostly from mistakes. I’ve made many mistakes. Such is science. Good research is often at the adjacent possible. I've written up much of what I've learned now that I'm beginning to mentor others. open.substack.com/pub/kyletoke...

I led an effort at Microsoft last Fall that studied whether SAE steering was an effective way to improve jailbreak robustness. Our paper on SAE steering has been accepted to the ICML Actionable Interpretability Workshop! Venue: actionable-interpretability.github.io Paper: arxiv.org/abs/2411.11296

I'll be in England this summer as an AI Safety Research Fellow with ERA! erafellowship.org/fellowship I will be studying data filtering and tamper-resistant unlearning for open-weight AI safety so that the community can continue to benefit from open models as capabilities improve.