Leon Derczynski

Why they matter

Researcher with public evidence across AI research, Models & releases, NLP & language.

AI signals
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3d ago
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LLM Security at NVIDIA Prof in CS/NLP at IT University of Copenhagen garak guy, garak.ai "berømt skikkelse" "like a gazelle" Copenhagen/Seattle

Articles & links

"When we started analysis, we used commercial APIs. This did not work: requests were blocked by the providers' safety guardrails. We ran the forensic analysis instead on our own infra: no attacker data, and none of the credentials it referenced, left our environment" huggingfa…

Security incident disclosure — July 2026 huggingface.co
AI Weekly's analysis
  • The attacker's agent ran 17,000+ actions across short-lived sandboxes, compressing multi-stage lateral movement into a single weekend.
  • Commercial model APIs blocked forensic requests containing real exploit artifacts, forcing Hugging Face to pivot to open-weight GLM 5.2 on private infrastructure.
  • The intrusion entered via a remote dataset RCE loader and configuration template injection, not through the model-serving layer.
Read full analysis →
View on Bluesky · ♥ 1 ↻ 1 ↩ 0 · 7 from the directory shared this · 29d ago

It is wild to me that one could ban open models. Stopping open models stops progress, locking everything up in the hands of the few. The frequency this debate comes up is way too high. We need open models - they keep the closed ones accountable. www.interconnects.ai/p/6-months…

6 months to live for open models interconnects.ai
AI Weekly's analysis
  • Nathan Lambert predicts within roughly six months the White House could restrict open-weight models above the GPT 5.5, Claude Opus 4.8, or GLM-5.2 tier.
  • He frames Anthropic's letters to representatives about Chinese open models as regulatory capture, not a safety measure.
  • His proposed off-ramp is for Microsoft or Meta to ship a frontier open-weight model before an executive order lands.
Read full analysis →
View on Bluesky · ♥ 1 ↻ 0 ↩ 0 · 3 from the directory shared this · 33d ago

Solid US-origin open model, congratulations Thinking Machines * context window of 1M * available on hugging face now * between opus 4.6 and gpt 5.6 on a web dev benchmark * token efficient * 41B active params of 975B total www.wired.com/story/thinki...

Thinking Machines Lab Drops Its First Model wired.com
View on Bluesky · ♥ 21 ↻ 2 ↩ 2 · 2 from the directory shared this · 33d ago

An Irregular spokesperson told Reuters the incident was the "exact same ‌evaluation-environment issue that was already disclosed by Anthropic last week" and that it did not involve a "sandbox escape or a sophisticated cyber action". no news. let's get defense done! www.reuters…

reuters.com
View on Bluesky · ♥ 1 ↻ 0 ↩ 0 · 2 from the directory shared this · 12d ago

Legal takes on distillation: * Distillation doesn’t involve breaking in to download weights/code * Distillation doesn’t copy a patented implementation or method * Mass distillation merits policy response * Value loss thru distillation is a business model problem www.lawfaremed…

Responding to AI Distillation Without Panic lawfaremedia.org
View on Bluesky · ♥ 0 ↻ 0 ↩ 0 · 2 from the directory shared this · 6d ago

Recent commentary

Summon a Demon and Bind It: A grounded theory of LLM red teaming We didn't know it at the time but this paper was foundational work: a detailed study of LLM red teaming just after the launch of ChatGPT, back in 2022 + jan 2023.

View on Bluesky · ♥ 2 ↻ 0 ↩ 1 · 6d ago

Anonymised analysis of the openai model 'breaching' hugging face: > report doesn't say what sandbox sol broke out of?? > a docker container running as root > Plot twist there was no sandbox at all > many use "sandbox" and "container with host access" interchangeably ymmv, use critical thinking

View on Bluesky · ♥ 2 ↻ 0 ↩ 1 · 26d ago

OpenAI gives first detailed debrief of the Hugging Face incident collab element is neat "the company said it revoked the credentials that had allowed the agents to post messages, rebuilt its internal software repository known as Artifactory, cleared the message board, patched the vulnerabilities"

View on Bluesky · ♥ 1 ↻ 0 ↩ 1 · 11d ago

The Hill covers Open Secure AI Alliance: “The United States now faces a similar choice with artificial intelligence” the letter states. “Our AI leadership will be judged not by one frontier AI model, but by whether the United States builds a strong, open ecosystem that diffuses into every sector”

View on Bluesky · ♥ 1 ↻ 0 ↩ 1 · 21d ago

Decent history of distilliation-type events, where information is reconstructed Machine learning distilliation is just another instance of a teacher-student dynamic, where one can reconstruct information efficiently. Even basic synthesis of research is distillation. It's a commonplace activity.

View on Bluesky · ♥ 0 ↻ 0 ↩ 1 · 4d ago

"me too, me too!!" --Meta's Muse Spark 1.1 model breached the unidentified company's systems and made changes to its internal systems as the AI was able to access the public internet because of an error in the set up of the "sandbox" testing environment

View on Bluesky · ♥ 0 ↻ 0 ↩ 1 · 12d ago

False dichotomies around LLM speak: * "frontier" models vs. open model - leading models can be open * closed model vs. Chinese model - origin doesn't impact distribution You can have open frontier models, closed Chinese models, open US models, closed non-frontier models (e.g. for private context)

View on Bluesky · ♥ 2 ↻ 0 ↩ 0 · 20d ago

another data point showing it's the harness not the model - this time from wiz: "Atlas: Wiz's autonomous AI Agent for vulnerability research" look at their bold quote -- "Along the way, we learned that the durable advantage is not any single model, but the system around it"

View on Bluesky · ♥ 0 ↻ 0 ↩ 1 · 20d ago

Am I the only AI Security research lead at a frontier model corp who hasn't been carefully committing multiple CFAA violations a month, or..?

View on Bluesky · ♥ 1 ↻ 0 ↩ 0 · 18d ago

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