David Marcus

@SethGRosenberg Congrats! 💪🏼

Excited to back the next generation of founders with Greylock 18

@benshapiro Mazal tov!

With immeasurable thanks to God, we’re proud to announce the addition of baby number 5 to the Shapiro family this morning!

@markpinc Which tells me there are still enough self-hating, delusional Silicon Valley leaders taking these meetings.

@davidmarcus His team pings me every week to meet. I have no idea why.

After the last Presidential election, Ro Khanna reached out. We had a short meeting where he pitched himself as the centrist, pro-DOGE, pro-Elon Democrat. I didn’t follow up. He then steered hard left to feed his ambitions. This man blows with the wind. I have the receipts.

@BlueBoxDave By becoming both first?

@davidmarcus I think he earnestly believes he can turn the socialists into New Dealers and the pro Hamas crowd into doves. In both cases this strikes me as very naive.

@fidjissimo You are a true inspiration and one of the strongest, most amazing humans I know 💪🏼

Today, I shared with the OpenAI team that I have decided to leave my full-time role at OpenAI and transition to being a part-time advisor. Three months ago, I had to go on medical leave after a severe exacerbation of a chronic illness I’ve lived with for seven years. During that time, it became clear that the road to recovery would be much longer and more complex than I had anticipated—and that I needed to focus on it fully. When I went on leave, many people told me I was courageous for prioritizing my health. The truth is that I am only making this decision now because I failed to make it many times before. Over the years, doctors, friends, colleagues, and loved ones encouraged me to slow down. Two years after I got sick, Facebook offered me the opportunity to take a full year of medical leave. I didn’t even pause to consider it. I immediately said no. At the time, Zuck told me I should play the long game. I wish I had listened. Looking back, I realize that a lot of what made me successful also made this decision incredibly difficult. I grew up believing that opportunities were precious and that when they appeared, you grabbed them with both hands. That mindset carried me from a small town in southern France to opportunities I never could have imagined. By the time I turned 40, I had already gotten to do more than I’d ever dreamed possible as a kid growing up in Sète. I love building. My work has always given me a deep sense of purpose. OpenAI in particular felt like a role that my entire career had been building toward, which made this decision even harder. But what I’m learning now is that grit and endurance are not the only skills required to have impact over decades. Sometimes the harder thing is to stop, listen, and trust that taking care of yourself today makes it possible to contribute for much longer tomorrow. This experience has also strengthened my conviction about why this work matters. It has been a jarring experience to spend my days helping build the future while simultaneously navigating a disabling disease that still has no cure. Over the last seven years, I’ve spent countless hours in doctors’ offices, dealing with symptoms, treatments, insurance, uncertainty, and all the invisible work that comes with being a patient. Like millions of others living with chronic illness, I’ve experienced firsthand how difficult healthcare can be to navigate, even when you have every possible advantage. More than ever, I believe that some of the most important opportunities for AI lie in helping people solve real problems in their daily lives: their health, their finances, their time and the everyday burdens that shape human experience. In particular, curing disease is the most important thing AI could accomplish. I’m excited to continue working towards cures through OpenAI but also through my work with @ChronicleBioAI and @CODA_research. I’m deeply grateful to @sama, @gdb and the OpenAI board for their support during this time and for offering a way for me to continue contributing to the mission without sacrificing my chances of recovery. I’m also so thankful to my team and the many extraordinary colleagues I’ve had the privilege to build alongside. For now, my focus is recovery. But my belief in the potential of technology to solve deeply human problems has never been stronger.

@iampaulgrewal @coinbase @brian_armstrong @Emilemc Legendary run. Truly.

After 6 years I’m leaving @Coinbase. I’ll be transitioning to an advisory role at the end of the month and continue my service on the Board of Coinbase National Trust Company. I will be a Coinbase ally for life and am grateful to @brian_armstrong, @emilemc and the Coinbase board for the opportunity of a lifetime. ⬇️

What if @spencerpratt’s destiny was to fix elections in California for good?

@davemorin ❤️ 🦞

Today we’re introducing the OpenClaw Foundation: a nonprofit home for open, independent personal AI. A full-time team. Great partners. One mission: bring personal AI to everyone. Welcome to the age of the lobster.🦞 openclaw.ai/blog/introduci…

@hsrwala @lightspark 🙏

I have extremely impressed by what @davidmarcus has pulled off with @lightspark and grid A weekend coding prototype seems so much easier and the room for programmability is also so wide I am hooked with the APIs and docs are also so neat Neat is the vibe I got playing around with it, great job!

@SpaceXAI 👀

Announcing Grok 4.5, our first model trained specifically for coding and agents. It was trained with Cursor and offers frontier intelligence at leading speeds and cost efficiency. x.ai/news/grok-4-5

Very cool launch from our friends over at @cakewallet today! @spark inside.

Let’s go 🇨🇭!!!

Excited to bring new ways to fund your favorite prediction market bets on @Polymarket starting today via @spark & @lightspark!

About 2 months ago we launched @Lightspark Grid Global Accounts. Empowering platforms to become a “neobank” for their customers globally. Today, we unlock an incredible new dev experience for builders. Super proud of the team for this. Try it here: docs.lightspark.com/global-account…

@the_transit_guy Did I endorse him? Is he a nazi? Was he accused of rape? Not a good guy either, but do you believe someone who’s had an affair and is dishonest is the same level of bad than being a nazi rapist?

@davidmarcus What’s your views on Ken Paxton out of curiosity?

Mainstream Dems suddenly realizing that endorsing a nazi, now also alleged rapist, for Senate was a bad idea. You already knew Platner was a nazi, boasting an SS tattoo on his chest. Surely you can find non-nazi, non-rapist, non-anti-American commies candidates? Right? FFS

@RitchieTorres 🐐

I have no endorsement to rescind. Graham Platner should drop out.

What @altcap, @MichaelDell, now joined by @Gwynne_Shotwell and others have done for this up-and-coming generation of young Americans will be looked at as one of the most consequential and game changing initiative to give every child a stake into America's success. Truly amazing!

@RoKhanna But being a nazi was ok.

I’ve been very clear that sexual assault or violence against women is a red line. These allegations are very serious and credible. Graham Platner should drop out from the race. I am withdrawing my endorsement.