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Steven Sinofsky
@stevesi
Subscribe • seed investing • writing • ॐ •🙏• I use '—' and no AI to write • tweets saved 90 days • 📷
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It's true. The principle of least privilege, separation of duties, input sanitization, logging & monitoring, defense in depth -- all apply to AI.
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My salute to the Indian pilot Captain Smit Machchhar for his extraordinary bravery. Despite being stabbed and seriously injured, he fought back, resisted, opened the cockpit door, and enabled passengers and crew to overpower the attacker — preventing a catastrophic mid-air disaster. He saved the lives of 174 people, including Israeli citizens and other nationals. I wish Captain Machchhar a speedy and full recovery. He is a true hero.
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I finally got around to listening to this @a16z podcast featuring @levie, @stevesi & @martin_casado on the "pacing" debate and what true AI system security really looks like. An outstanding discussion. I was shouting "YES!" at every juncture. Please take the time to listen:
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🚨BREAKING: FTC has officially confirmed an investigation into OpenAI, Anthropic, and EA-linked evaluator METR FTC Chairman Ferguson opened this probe BEFORE the Hugging Face hack, warning against AI labs stirring panic in DC to build themselves a regulatory moat Now they're drafting Civil Investigative Demands to FORCE executives under oath to testify about the dangers they've been claiming
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I'm hiring a Chief of Staff to help me run all our initiatives at the intersection of investing, networks, and media. Senior role with a big impact. Email et@a16z.com with a cosign and some ideas for what we can do better and how precisely you'd help. This role has been open for so long because anyone I could have hired for the role ended up being hired to lead a division or new initiative instead. All roles below are also still available. This year we incubated a media company, a school, and a professional network—on top of all the work we do for our companies and for the firm. We're now planning what big projects to take on next year. Get on the ground floor with us...
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September, in five headlines: → Biggest Oktane ever → Joined the @the_blueprintai → Shipped Agent SSO → Launched Okta for AI Agents → Extended the Kill Switch Strip away the headlines, and it all comes down to four questions: Where are your agents? What can they do? What are they doing? How do you respond? Answer all four, and security stops being the tradeoff for innovation. It becomes the foundation for it. September's over. The work isn't.
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Alignment really needs a spec so we know what these companies mean by it.
.@sama says it's incorrect to talk about alignment purely as an engineering problem. "Of course, there's a lot of engineering work to do. We need to continue to figure out how to build better sandboxes and monitoring tools." "But eventually, if we're going to create models that are much, much smarter than us, we have to actually solve the *science* of alignment."
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Bluesky v. X. Just observing engagement.
Congratulations @brijones @duanec @sumit_c and the Excel team. Very few apps are as important as Excel! And, nice collection of t-shirts!
So glad I parked the domain ages ago.
A passenger on the Dubai–Tel Aviv flight recounts: “We are currently in Saudi Arabia. One of the crew members attacked the pilot with a knife and disabled the aircraft’s systems. Yaniv (pictured?) and another passenger stormed the cockpit and subdued the attacker. Luckily, there were two more pilots on board. They were the ones who managed to land the plane.” Well, yes. Overall, the probability that a plane full of Israelis will contain a trained assault team, two additional pilots, and, statistically, at least one cardiac surgeon, psychologist, lawyer, and diamond dealer is substantially higher than 50%.
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Only President Trump could convene all the leaders of the top companies developing chips, data centers and frontier models for Super Intelligence. This new Industrial Revolution has already created a million new jobs and is spurring a bigger infrastructure build-out than the railroads, canals and grid combined. I was honored to witness history as the leaders of the frontier lab companies signed the White House Accord on Super Intelligence, accepting responsibility for the safe development of their products and imposing new internal controls and external audits. This is far better than waiting years for some international agreement that would probably never happen. President Trump continues to ensure that U.S. remains the technology leader while putting Americans first.
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Backstage before our panel on superintelligence at the launch of Will post the video when it comes out. Also @jgebbia has done something truly awesome for the country. We should all be grateful! 📸 by @KatieMiller
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The world is safer if cyber capabilities are broadly disseminated than it would be if they were monopolized.
Amazing! Edward “Big Balls” Coristine is a coder who’s been with this fight since DOGE started in 2025 with Elon Musk. He’s now Head of Engineering at the National Design Studio - the team that actually built .America.gov. Joe Gebbia put him in charge of the engineers. Today the 20-year-old is on stage with President Trump as they launch it! 🇺🇸 Built by AMERICANS. For AMERICANS.
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This is definitely the real world view. 💪
Sigh. I wrote this post below, but then I didn't post it because I am tired of the consistent pushback I get from folks with the same safety worldview as Anthropic. I guess that means I should send it. Here goes! This post is pretty solipsistic and doesn't properly take recent events in cyber risks into it's discussion. It is really hard for me to watch how the US frontier labs like Anthropic don't have the ability to consider other approaches to safety and ways things could play out. It insinuates that Z ai (Chinese lab, builds GLM series) doesn't really care about safety and is reckless to take their business strategy. Saying things like "Given this evidence, we think it's likely both state and non-state actors will use models like GLM-5.3 to cause real-world harm." and "This is unlike any other similarly capable AI model, all of which were released with safeguards or through limited access programs." while closed models have been used on more of the documented cyber attacks is just bowing out of the interesting question. A plausible view is that open model weights and closed model apis (with some safe guards) are both far closer to being easy to mis-use, rather than API models being closer to safe. The trope "Open Dangerous, Closed Safe" may be closer to "Open Unsafe, Closed Unsafe" Closed models have stronger capabilities and stronger safeguards, but the stronger capabilities part could matter more in net harm if both the safeguards are porous. At the same time, as the authors do acknowledge (thanks - thats progress!), open models without extreme cyber guardrails are important to rapidly diffuse cyber readiness in the economy -- as programs like project glasswing are not perfect in getting all critical industry onboarded. There will be more issues like the time when Fable was released and Amazon found a workaround, which allowed them to access the full capabilities of the model served readily at an API. The blog overall is reasonable in it's narrow line, but it's a very effective tool in a complicated, rapidly evolving media ecosystem to reinforce a certain type of safety thinking.
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