Rishabh Surendran

Pleasure meeting Air Marshal G S Bedi (Retd.), veteran fighter pilot of the @IAF_MCC, former DG Inspection and Flight Safety and previously Air Attaché to the United Kingdom. We discussed emerging aerial threats (hypersonics), the classic Lockheed U2 and SR71 stories etc. 🫡🙌🏼

@mignano Congrats Mike! I remember hearing you speak at Bloomberg HQ while I was a grad student in 2024 and now found my way into early-stage investing. Look forward to your journey at USV.

Huge congratulations to LTGEN Susan Coyle on making history as Australia’s first female Chief of Army 🇦🇺 Her recent visit to India reinforced the depth of our defence partnership. We look forward to advancing 🇦🇺🇮🇳 ties under her visionary leadership.

Oh, this is unbelievable. The edit history on this tweet shows that Pakistan Prime Minister Shehbaz Sharif originally copied and pasted everything he was sent, including: "*Draft - Pakistan's PM Message on X*" Now, obviously, Sharif's own staff don't call him "Pakistan's PM," they would just call him prime minister. The U.S. and Israel, of course, would call him "Pakistan's PM." Would be funny if the fate of the world wasn't hanging in the balance.

We’re leaving no stone unturned in tackling the city's housing crisis! Today DOB approved plans for NYC’s 1st underground skyscraper, a 90-story building constructed below street level to protect skyline views. Keep your eyes peeled for more “earthscrapers” across every borough

🚨 Bengaluru-based @Airbound_Aero has conducted 700 flights for Narayana Health since January 2026 with a zero failure rate.

In the 3 weeks since the IndiaAI Summit, @177pc and I have met 43 founding teams. Deeply technical, most in their mid-late 20s, and building for India or with a strong India-edge. Some common themes we saw and like: - AI-led IT Services: What does the Palantir for India look like? Reimagining Infosys/TCS/Wipro AI-first. - Compute for India: As enterprise demand ramps up, the country needs more sovereign inference and infra capabilities. - AI for the "real world": Purpose-built models for material sciences, biotech, manufacturing, security & defence. - Healthcare AI: Both India's AI doctors and AI agents that transform primary care. - Physical AI: More than just the end robots, can India provide the data infrastructure for the world? (Scale AI for robotics) - Voice AI: Everything from foundational research to vertical agents to full stack solutions in what will probably be the largest Voice AI market globally. Indian AI startups will look different and have their own lane. We’re just starting to see the first signs.

@sama Enough man, this is looking even more cheap

Here is re-post of an internal post: We have been working with the DoW to make some additions in our agreement to make our principles very clear. 1. We are going to amend our deal to add this language, in addition to everything else: "• Consistent with applicable laws, including the Fourth Amendment to the United States Constitution, National Security Act of 1947, FISA Act of 1978, the AI system shall not be intentionally used for domestic surveillance of U.S. persons and nationals. • For the avoidance of doubt, the Department understands this limitation to prohibit deliberate tracking, surveillance, or monitoring of U.S. persons or nationals, including through the procurement or use of commercially acquired personal or identifiable information." It’s critical to protect the civil liberties of Americans, and there was so much focus on this, that we wanted to make this point especially clear, including around commercially acquired information. Just like everything we do with iterative deployment, we will continue to learn and refine as we go. I think this is an important change; our team and the DoW team did a great job working on it. 2. The Department also affirmed that our services will not be used by Department of War intelligence agencies (for example, the NSA). Any services to those agencies would require a follow-on modification to our contract. 3. For extreme clarity: we want to work through democratic processes. It should be the government making the key decisions about society. We want to have a voice, and a seat at the table where we can share our expertise, and to fight for principles of liberty. But we are clear on how the system works (because a lot of people have asked, if I received what I believed was an unconstitutional order, of course I would rather go to jail than follow it). But 4. There are many things the technology just isn’t ready for, and many areas we don’t yet understand the tradeoffs required for safety. We will work through these, slowly, with the DoW, with technical safeguards and other methods. 5. One thing I think I did wrong: we shouldn't have rushed to get this out on Friday. The issues are super complex, and demand clear communication. We were genuinely trying to de-escalate things and avoid a much worse outcome, but I think it just looked opportunistic and sloppy. Good learning experience for me as we face higher-stakes decisions in the future. In my conversations over the weekend, I reiterated that Anthropic should not be designated as a SCR, and that we hope the DoW offers them the same terms we’ve agreed to. We will host an All Hands tomorrow morning to answer more questions.

Watching Nikhil Kamath's podcasts has become increasingly frustrating. Given the kind of access he has to high-profile guests, you feel there is so much potential in what these podcasts could be, yet it leaves you wanting. He says "this is a conversation", yet after every 'elaborate' answer he simply moves on and reads out the next question from the paper. The only time it "felt like a conversation" was with Ranbir Kapoor, when it was Ranbir who asked him things and forced him to talk outside the 'script'. The recent interviews with business personalities, at times it seems you could just edit him out of the whole video without losing much. He simply seems to reading questions at 0.5x and not adding anything from his end. I know he's not a professional interviewer/podcaster and this is not his job, and we shouldn't really be judging him on things he doesn't claim to be an expert at, but in that case as a viewer I'd just expect him to "converse" with his guests than try to be a "journalist" who is taking an interview.

Sitting in India right now, watching the world burn in real time. US & Israel striking Iran. Iran retaliating across the Gulf. Russia-Ukraine still raging. Pakistan-Afghanistan tensions simmering. Missiles flying over Tehran, Bahrain, Abu Dhabi, Qatar. And here I am, safe at home on a Saturday evening, in a democratic, peaceful country, worrying about none of this at my doorstep. We don't say this enough - we are incredibly lucky. Not perfect, not without problems. But at peace. That's not a small thing in 2026.

@sama Can we all cancel our ChatGPT pro and switch to Claude? Repost this comment if you did or plan to do so.

Tonight, we reached an agreement with the Department of War to deploy our models in their classified network. In all of our interactions, the DoW displayed a deep respect for safety and a desire to partner to achieve the best possible outcome. AI safety and wide distribution of benefits are the core of our mission. Two of our most important safety principles are prohibitions on domestic mass surveillance and human responsibility for the use of force, including for autonomous weapon systems. The DoW agrees with these principles, reflects them in law and policy, and we put them into our agreement. We also will build technical safeguards to ensure our models behave as they should, which the DoW also wanted. We will deploy FDEs to help with our models and to ensure their safety, we will deploy on cloud networks only. We are asking the DoW to offer these same terms to all AI companies, which in our opinion we think everyone should be willing to accept. We have expressed our strong desire to see things de-escalate away from legal and governmental actions and towards reasonable agreements. We remain committed to serve all of humanity as best we can. The world is a complicated, messy, and sometimes dangerous place.

Ads are coming to AI. But not to Claude. Keep thinking.

@naval @what do you define as hardcore?

Work with hardcore people on hardcore things.

I used to think there was a "YC for India" thesis possible after the rise of some Indian investors. But now I realize YC is the YC for India. Nobody thinks like YC. Nobody is founder friendly like YC. YC doesn't play status games. Couldn't recommend it more.

I have the privilege of knowing Lt Col Akshat. Can vouch for this book and the field-learnt and research backed learnings that this book shall present.

Lt Col Akshat Upadhyay, a serving officer with #HQ_IDS presented his book ‘Emerging Frontiers: Technology Absorption in the Indian Army’ to General Anil Chauhan, Chief of Defence Staff #CDS. The book tackles a defining challenge of the present time : how can militaries absorb emerging technologies - #AI, drones, #Quantum computing and #Cyber tools - that were never designed for war, yet are rapidly redefining it! With comparative insights from the US, Israel, Ukraine & India and powerful lessons drawn from the Russia–Ukraine, Armenia–Azerbaijan & Israel–Hamas conflicts, the book calls for bold reforms in India’s defence innovation ecosystem. It advocates for building not just firepower, but technological fluency—where soldiers become co-creators, collaborators & strategic technologists. @DefenceMinIndia @SethSanjayMP @MIB_India @SpokespersonMoD

What Elon Musk is doing is genuinely heroic. He will win no friends in politics and will be ostracised by the current administration. But he is totally right. We (the entire Western world) simply cannot go on pretending our way of life is sustainable. Historically, countries build up surpluses in peace time and then go into debt to fight wars. We are going into more and more debt during peace time. Clever economists will tell you this is sustainable. It is not. And someone has to do something about it.

It was our great pleasure to meet and interact with Air Vice Marshal Rajiva Ranjan VM, Assistant Chief of Air Staff, Ops Space (Space, Cyber and Electronic Warfare), Indian Air Force to discuss the 'National Deep Tech Start-up Policy', spearheaded by the Office of @PrinSciAdvGoI.

@cory Interested Cory, have been building startup communities for climate tech and AI safety in NYC for the past one year.

"No Title" super excited to share we are looking to add one more person to the Z Fellows team full-time to help. here's more info about the role... "No Title". this role is all around finding and helping propel undiscovered, first-time technical founders. you will collaborate directly with me on Z Fellows recruitment and do things like the below (and way more) to meet undiscovered builders. for now, the title is called “No Title” but I’m sure we will change the title to something you like and come up later. some of the fun things we do are: Z Fellows, Retreats (like the one we did with a Navy SEAL at a summer camp), Software (like Night Club 9), talks and dinners with Z Fellow mentors, and lots of IRL campus visits. builders tend to work late and so we do things late at night and on weekends.... this isn’t a 9-5 thing (but you probably already know that). the ideal person is someone who is technical and a builder themselves. you probably also aspire to start a company one day. you probably have helped organize a hackathon or cool builder meetups before. people probably think of you when they think of startups. you probably test lots of new tech products. you’ve probably skipped class or work to work on some startup related things. you will have the opportunity to rotate through various awesome cities and college campuses meeting the next generation of founders. by doing this role, you’ll likely obtain a very large network of smart, young people. this’ll be a nice launching pad to starting your own company one day (and being able to recruit great people for it). @ reply if you're interested in learning more, and I'll DM u more info.

Wishing our forces Godspeed, safety and further success. To their families across India, thank you. 🇮🇳 #OperationSindoor

@sama how do you explain AI to a five-year old?