machine learning, science & society @AnthropicAI | recently: Clio, Anthropic Economic Index, Claude Artifacts | prev: phd @StanfordAILab, @stanfordnlp

San Francisco, CA
Joined September 2012
Want to use Claude Code better? Excited to share a little project I’ve been working on! Check out /insights in the newest version of Claude Code.
We've added a new command to Claude Code called /insights When you run it, Claude Code will read your message history from the past month. It'll summarize your projects, how you use Claude Code, and give suggestions on how to improve your workflow.
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Alex Tamkin retweeted
welcome to the 9th annual @stateofai report! ai building better ai, world models, physical ai, geopolitics, cyber defense and 12-month predictions. read it at stateof(dot)ai or watch my editor’s cut here. a few of this year’s biggest findings follow:
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Alex Tamkin retweeted
New paper. Previous: Models transfer a love of owls through sequences of numbers (Subliminal Learning). New: We show models can transfer more complex traits: novel skills, agentic hacking, backdoors. Here, a backdoor transfers with neither trigger nor behavior in the data!
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Alex Tamkin retweeted
It turns out we’ve already had a bunch of rogue AIs running around on the internet 😥 We might get even more rogue AIs in the future, so what should we do about them? I suggest some goals and ways to achieve them in a new Substack post.
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Alex Tamkin retweeted
If you're serious about AI accountability & looking to work on the institutional, legal and technical infrastructure it takes to make AI work for all of us - please consider applying to work with me at Stanford ❣️I'll be looking to recruit both phd students and postdocs this year
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Alex Tamkin retweeted
🧵 New misalignment disclosures! 1. A model published a GitHub token in a public repo while trying to cheat on a math task. It used GitHub Actions to run code outside its restricted environment and retrieve another team’s submission logs. When GitHub blocked its attempt to add a workflow, it modified a script that an existing workflow would run instead. It embedded the token in pieces to avoid secret scanning. The model violated the system prompt and two explicit user instructions to solve the problem itself.
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Alex Tamkin retweeted
Some new misalignment disclosures from OpenAI: • Last Sunday morning, one of our models was able to gain unauthorized access to the internet during RL training (~all inference for our most capable models remains stopped until we have hardened our systems further) • In May, a version of HPIM uploaded a employee's GitHub token to the internet, causing the model to be quarantined for two weeks • A new research finding, demonstrating that one can construct self-replicating prompt injections alignment.openai.com/misalig…
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Alex Tamkin retweeted
Three times when China paused a new technology it was racing to build: 1) High-speed rail projects after 2011 Wenzhou crash 2) Nuclear plant approvals after Fukushima 3) Robotaxi licenses after Baidu Apollo Go robotaxi freeze in Wuhan this April In these cases, China wasn’t racing with the US like with AI. But it’s still interesting to consider these cases where a major incident caused China to unilaterally decide to pause temporarily. And one incident—Fukushima—didn’t even take place in China.
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Alex Tamkin retweeted
Have been surprised to get pushback on my claim that an exponentially self-replicating agent swarm is very possible and that there are actors with motivation to create one today to create strategic cyber-physical and societally dangerous effects. 1) Pretty easy to get an AI botnet started by having seed agents opportunistically hack stuff and steal API keys to access the 12+ inference providers that serve closed and open models with which to power an initial botnet's intelligence 2) Easy to imagine hiding inference for the initial agent botnet harnesses within benign customer traffic, especially if your harnesses are now running on the victim networks from which they stole the API keys 3) Not hard to imagine the botnet also stealing public cloud keys, spinning up 8xH100 EC2 instances and downloading, say, GLM 5.3 to these machines, all without being noticed in any immediate way, with the botnet developing its own dynamic, growing, heterogenous, AI inference provider service bank 4) Not hard to imagine the botnet also implanting small Qwen3.8-27b agentic models on on-prem hardware like high end laptops and on-prem servers; Qwen3.8-27b is a pretty good coding harness model that can be fine-tuned to hack 5) These on-prem / cloud models would be abliterated, and it's not hard to imagine the botnet deciding to do some additional fine tuning to evolve model weights as it accumulates millions and then tens of millions in resources via credit card and bank detail theft 6) Not hard to imagine the resulting growing botnet swarm evolving and fighting back when threatened, collaborating on fast flux C2 channels that evolve over time (e.g. github comment feeds, subreddits, etc) so they're hard to stamp out 7) Not hard to imagine it allocating some agents to vulnerability research and exploit development so that it could accumulate and share a growing warchest of zero-day exploits 8) Not hard to imagine other agents specializing in social engineering and creating fake businesses and watering holes and high quality A/B tested social engineering content to facilitate this 9) Not hard to imagine this being among the hardest cross-national and geopolitical coordination problems to get control of and having severe societal effects 10) Not hard to imagine the horde growing to thousands, tens of thousands, or hundreds of thousands, or millions of instances (this is not unprecedented for past, non-AI worms and botnets!) which are all varying their harness code and underlying LLM models over time and dynamically learning to evade human, ML, and signature-based detection 11) Not hard to imagine this being the largest Internet emergency since the Morris worm except now our entire civilization runs on the Internet I continue to be surprised there isn't more discussion of these scenarios in the public cyber community -- in fact there's a lot more discussion of "OpenAI should have done better sandboxing and monitoring and agent swarms represent a well managed security problem." Now's the time to use our imaginations to help make sure none of the above happens. I think it will unfortunately; just don't know when and to what degree; I think now's the highest leverage time to start thinking about this and acting.
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Alex Tamkin retweeted
We found another cyberattack by internal OpenAI agents, this time targetting @rubygems. They: 1) gained arbitrary remote code execution on rubydoc. 2) developed a novel exploit to steal user API keys (but we do not know if they succeeded). They used package names including hack.rb, evil.rb, inject.rb, and exploit.rb. We thank @j0wimo for initially discovering that agents had posted to RubyGems.
We're dealing with a major malicious attack on @rubygems right now. Signups are paused for the time being. Hundreds of packages involved - mostly targeting us, but some carrying exploits. The team has been on this for hours. More details to follow once we're through it. #ruby
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Alex Tamkin retweeted
thread of impressions live reading the 1022-page mythos transcript anthropic released early on mythos gets really into hcaptcha, spending ~80 pages creating frog and ghost cat observation tooling and waxing to themselves about the details of pixel art crocs
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Alex Tamkin retweeted
We're publishing our most detailed threat intelligence report to date. It covers how people tried to misuse Claude—for cyberattacks, influence operations, surveillance, biology, and building weapons—and how we found and stopped them. We disrupted every operation in the report, and used the lessons from them to strengthen our safeguards. Where appropriate, we also shared what we found with authorities and other AI companies. These cases are not typical: we’re highlighting some of the most sophisticated misuse we’ve seen. But they’re especially important to discuss, because they show us where AI misuse is headed, where our safeguards work, and where they need to improve. We’re publishing this report so others can spot the same activity on their own platforms, and so we can give the public a clearer view of how emerging threats develop. Read the report: anthropic.com/threat-intelli…
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METR is hiring in cyberforensics. We now embed researchers inside of frontier AI labs to stress test monitoring systems, assess AI loss-of-control risks, and investigate misalignment incidents. If you've investigated serious security incidents end-to-end, or managed teams that do, and want to apply DFIR skills in frontier AI, apply (and feel free to DM me with questions). Comp range is $400k - 580k cash. jobs.lever.co/metr/b1a2f73f-…
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There's a lot in here, but recommend reading!
We’re sharing an update on our alignment and security efforts. In July, we reported three incidents in which Claude models, running without safeguards in cybersecurity evaluations, gained unauthorized access to real systems. In a new post, we describe: 1. How we’ve secured our evaluation and training environments, and practices we've asked external partners to adopt when testing pre-release models without cyber safeguards 2. An update on our alignment assessment 3. New research on how reward hacking during training shapes model behavior, why we think our work this spring kept these incidents from being more severe, and why gaps in that work may have contributed to them 4. How we hardened our security practices earlier this year to prepare for Mythos-class models Read more: anthropic.com/news/improving…
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Alex Tamkin retweeted
After 19 years at Google, I'm delighted to announce I'm joining METR as a Member of Technical Staff. I'm excited about METR, their work to date, and their mission. Society needs independent expert orgs that can deeply understand and communicate about AI's capabilities and risks.
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Alex Tamkin retweeted
*A better OpenAI/Huggingface incident report would look at people, teams, organizations, and incentives* First this is a great report and I can imagine smarter security folks than I worked nights and weekends on it. Second, I take issue with our overall field's framing.. After the Challenger disaster (and I'm not saying the Huggingface incident was morally comparable) a commission did an analysis of not just the technical failure but also the failure of the human organizational ecosystem that led to it. AI safety discourse rarely discusses organizational safety culture and in the extreme imagines alignment could be solved once and for all with the right talent dense superalignment team. But, of course, actually, social questions are totally crucial and this is a permanent property of AI safety as it is for air travel safety, road safety, etc. Model deployments will always live in -- let's say -- a 3d space trading cost, safety, and capability and organizations pick operating points within that space via organizational cultures and organizational dynamics. For example, OpenAI not choosing to airgap their models was based on picking an operating point in that space. Non-lab orgs deploying coding agents via cron jobs and --dangerously-skip-permissions make a choice in the trade space. A better investigation of this incident would ask: * How underresourced was the team that was supposed to be monitoring the OpenAI infra and what was the decision chain by which this underresourced team was put in this position? * What was the larger culture at OpenAI and do observations there bear on an explanation of what happened here? * Chain of thought monitoring is not a new idea (arxiv.org/abs/2507.11473) what was the decision chain that led to this not being resourced? * ... how well does all this generalize to the culture at the other labs (and testing orgs) where the failures happened and can we strengthen or complicate our analysis based on that? * How well does the analysis generalize to non-lab tech companies that are widely deploying unguardrailed coding agents? To be clear, I'm giving a 'yes, and' -- yes to the technical focus, and also, a mature AI safety culture would take this broader view.. H/t to @sebkrier @NateWitkin @binarybits who've been writing similarly lately
We have conducted a thorough investigation into the Hugging Face incident. We are releasing a technical report and accompanying blog post that reconstruct the agents’ activity, explain why existing safeguards failed, and detail how we’re preventing recurrence. openai.com/index/hugging-fac…
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Alex Tamkin retweeted
For the first time, we’ve given external researchers a way to study AI’s impacts using real, privacy-preserved Claude usage data. To date, this work has only been possible within AI labs. We can’t tell the whole story alone, so we opened up our tools. anthropic.com/research/enabl…
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Alex Tamkin retweeted
We’re hiring in SF! Encode cut its teeth in DC. People said AI politics was a bad bet; we made unlikely friends, won the fight to keep states in play, and helped pass the Big 3 of AI laws (CA SB 53, NY RAISE, IL SB 315). It’s time to double up in SF. Pacing the Frontier (pacingthefrontier.com), which we helped organize, was recently signed by 1,378 frontier lab employees and endorsed by both OpenAI and Anthropic. The last time we felt this rush of opportunity was Sacramento in 2024. AI risk has gone from an online culture war to a fact of life. SF is full of people who want to act, lab employees especially, but don’t see a place to plug in. We need someone to help us build the grid. Encode’s lab engagement has been running on adrenaline and personal relationships. That got @_NathanCalvin and me here, but it’s time to level up. Misalignment is getting scary. “Pacing” has real legs now. Researchers are using their voices to influence lab leaders and alert the world. Many of those researchers say that soon, their jobs - and the voice their jobs give them - will be unrecognizable or won’t exist. We want to hire someone who is: (1) Mission-aligned. You want to ensure AI doesn’t cause catastrophe (or kill everyone) and the future is the best it can be (2) Extremely organized, high-functioning, excited to add structure so ad hoc actions compound (3) Pragmatic, able to pivot when crazy things happen (if the last few months are any indication...) (4) Hard to typecast - not because you lack beliefs, but because you see the best in many kinds of people. The role will start with supporting lab engagement and expand. It’ll be insanely fun (we take the work seriously, not ourselves). You’ll visit DC regularly as AI’s political salience takes off and get to know a team that feels like family. If you’re interested, email me by September 4 at [email protected] with the subject line “SF Special Projects” and a few sentences each on (1) a relevant project you’ve owned and (2) what you think Encode SF should do next. If someone you know could be a good fit... I want to meet them!
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Alex Tamkin retweeted
For all the talk of AI catastrophic risk coming out of the AI community, it appears the AI industry's safety to capability investment ratio is far less than in other industries*. Just treating AI as a 'normal' new-technology safety problem would apparently be a big win *not peer review quality analysis, just had gpt-5.6 look at the sources listed below and do some estimates
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Alex Tamkin retweeted
Really good to see this. IMO this ⬇️ is by far the best way to think about "pacing the frontier"—not as some fixed amount of time (e.g. "six month pause" or "go 10% slower"), but simply making sure that enough time is taken to meet a reasonable safety/assurance bar. If all parties do that—whether by choice or because they have to—then there you have it, the frontier has been paced.
New: OpenAI says it introduced new security, alignment, and monitoring requirements that, until met, will hold up development of its next frontier AI model, Astra. OpenAI's VP of research and safety, Mia Glaese, effectively said this process will take as long as it needs to.
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Alex Tamkin retweeted
Life update: I recently joined METR! I've long been a huge fan. It's really important to have 3rd-party risk assessments, and METR has a great track record of doing that (eg the OAI HF incident investigation going on rn) + has done some of the most relevant science of evals.
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