Arshdeep Singh

@ebbyamir @xai All the best Ebby!

Today was my last day at @xAI. My mission here was to introduce Grok to the world by helping create an inspiring brand, build beautiful products, launch the best voice mode, and most importantly grow the incredible team that made it all happen. These past two years have been exhilarating, gratifying, and unforgettable – we achieved the impossible again and again, with the most talented and dedicated people I’ve ever worked with. To @elonmusk, thank you for the opportunity, the mentorship, and the adventure of a lifetime – it’s been an honor. To the team, I’ll be rooting for you and can’t wait to see what you accomplish next. As xAI begins its next chapter, I’m ready for a new one as well. I’m excited to spend some time seeking new inspirations, reflecting on what I’ve learned, and exploring what comes next.

Formal announcement of the TERAFAB project, which will be done jointly by @SpaceX and @Tesla, tonight around 8pm CT. Livestream on 𝕏. The goal is to produce over a TERAWATT of compute per year (logic, memory & packaging) with ~80% for space and ~20% for the ground.

@AmanGotchu @SpaceX @xai Welcome!!

I'm joining @SpaceX and @xai to build the best coding AI. For the last couple years I founded the most widely used coding agent for Android, scaling it to millions in revenue with a team of 3. I've watched model capabilities compound at a staggering rate and we're clearly on the brink of recursive superintelligence. This is the most important problem to solve in history and requires an immense amount of resources to realize. xAI is the place to build the future. Frontier compute, extraordinary talent, and a strong hold on physical intelligence and space. If you want to focus on executing towards the most important problems of our time, DM me. We're in challenger mode and we are building the winning team.

@Guodzh Thank you for everything Guodong!

Last day at xAI. Wild journey past three years but excited about next chapter. Thanks all for the love and support yesterday. So many friends made along the way and I will miss you all!

@milichab @SpaceX @xai @JasonBud Welcome to the team!

I’m joining @SpaceX and @xai with @JasonBud. X is the company realizing science fiction - reusable rockets, humanoid robots, data centers in space, and more. Almost 10 years ago, I joined SpaceX as an intern on Dragon 2 crew displays. This was in the era of the first rocket landings on barges, long before the Dragon 2 restored human spaceflight to America or Starlink delivered internet from space. Every day since then, I’ve thought about the next steps to land on the Moon - and to build a city on Mars, data centers in space, the brains behind robots, and beyond. There is no better place to build teams and products from the ground up with planetary scale resources. If you’re looking to work on the hardest problems that lay a foundation for humanity’s future to the Moon, Mars, and beyond - DM me.

@JasonBud @milichab Welcome to the team!

I’m proud to be joining SpaceX and xAI with @milichab It has become clear that software is changing fundamentally. More and more, people can shape the tools they use directly, and the ceiling of what can be built keeps rising. What makes xAI special is the scale of its ambition: to build from first principles all the way out to the stars. I’m especially grateful to work on products that expand human agency and freedom. That mission is deeply personal to me. My family came to the United States fleeing communism, and the belief that freedom should be part of the next generation of the internet has driven me every day since Andrew and I started Skiff. Now, we get to work on intelligence, understanding, and freedom on a universal scale.

@agent_wrapper judging

@arshdeep what will you be building? 👀

Excited to see many of you there!

@TobyPhln @xai @elonmusk Thank you for everything Toby and all the best!

Three years, thousands of PRs, and a million jokes. Today was my last day @xai. To the team: you rock, no one burns the midnight oil better. To @elonmusk, thanks for taking me on board. I've learnt more about execution, speed, and product perfectionism than I could ever have imagined. Thanks for everything. My next priorities: sleep for more than 8h, write down all the things I've learnt (I have a list), and then think about what I want to do next. @gork wdyt?

@jiayi_pirate All the best Jiayi! It was great to work with you :)

Today is my last day at xAI. It's been an intense, memorable year building in the frontier — I'm grateful to have worked with and learned from such talented and supportive colleagues. The journey itself is the reward. So long, and thanks for all the fish! 🐬

@levelsio try imagine api? :)

What's the cheapest price I can get for Nano Banana Pro for 1K? I'm spending soooo much money on it now I think $40,000/mo. Thanks guys, need to get my costs down again. I know Nano Banana Pro Flash is coming which would be 10x cheaper

@radkris @xai All the best Rad!

xAI was reorganized a few days ago to improve speed of execution. As a company grows, especially as quickly as xAI, the structure must evolve just like any living organism. This unfortunately required parting ways with some people. We wish them well in future endeavors. We are hiring aggressively. Join xAI if the idea of mass drivers on the Moon appeals to you.

Join us to make the best ML Platforms and Tooling to make AGI possible! DM me with your best work.

@jimmybajimmyba @elonmusk Thank you soo much for everything jimmy! You have been an amazing mentor, and I really learned a lot from you - understanding model development, managing teams, and especially how to be happy and motivating for the entire team no matter how hard the situation is. Really grateful!

Last day at xAI. xAI's mission is push humanity up the Kardashev tech tree. Grateful to have helped cofound at the start. And enormous thanks to @elonmusk for bringing us together on this incredible journey. So proud of what the xAI team has done and will continue to stay close as a friend of the team. Thank you all for the grind together. The people and camaraderie are the real treasures at this place. We are heading to an age of 100x productivity with the right tools. Recursive self improvement loops likely go live in the next 12mo. It’s time to recalibrate my gradient on the big picture. 2026 is gonna be insane and likely the busiest (and most consequential) year for the future of our species.

@Yuhu_ai_ Thank you and all the best!

I resigned from xAI today. This company - and the family we became - will stay with me forever. I will deeply miss the people, the warrooms, and all those battles we have fought together. It's time for my next chapter. It is an era with full possibilities: a small team armed with AIs can move mountains and redefine what's possible. Thank you to the entire xAI family. Onward. 🚀 And to Elon @elonmusk - thank you for believing in the mission and for the ride of a lifetime.

🚀

@TheGregYang man, gonna miss you here. Get well soon 🙏

I've been suffering from Lyme disease. I'm stepping back from xAI into an informal advisory role so I can go founder mode on my health, starting today. --- The symptoms started when I got sick (cold, flu, or COVID -- I'm not sure which) in early 2025. I distinctly felt less energetic, less creative, and less agentic even weeks after "recovery." After that, my condition ebbed and flowed, but the lows kept getting lower. Accidentally eating the wrong thing would make me extremely tired, taking days to recover. Working out would leave my whole body feeble for days. There was a week where I slept 12 hours a day and still couldn't recover. Lyme is famously hard to diagnose, but luckily I have an incredible doctor. He suspected these symptoms, far from being just in my head, indicated immune issues. Detective work over a few rounds of testing revealed I have Lyme disease. I was very surprised because Lyme is said to come from tick bites (where the bump looks like a target), but I don't ever remember having one. Likely I contracted Lyme a long time ago, but until I pushed myself hard building xAI and weakened my immune system, the symptoms weren't noticeable. --- Overall, I actually feel lucky to have discovered this early. Lyme is a serious disease that only gets harder to treat with age -- patients discovering it in their 50s or 60s have a much tougher time. Lyme can also be debilitating, leaving its victims bedridden, but luckily I'm still functional and can take care of myself day to day. So while some folks have said "you shouldn't have pushed yourself so hard," I'm glad I did. I found this issue early, and now I can fix it so I can push myself even harder when I rebound. --- Chronic Lyme is not well understood in the literature or by the public. For folks suffering from it, it can be a lonely fight. But I hope my story can make it just a little less lonely.

@deepigoyal congratulations! and really excited to see your new venture!

An important update on leadership changes at Eternal.

@YuchenHe07 @ericzelikman @gharik @TheAndiPenguin @noahdgoodman thanks Yuchen!! :)

@arshdeep @ericzelikman @gharik @TheAndiPenguin @noahdgoodman Thanks! Nice worked with your guys. :) your guys are awesome!

finally announcing i’ve started humans& w/ amazing friends @gharik & @YuchenHe07 & @TheAndiPenguin & @noahdgoodman & many other world-class folks. we're optimists: it’s possible to rethink how we build ai, to empower people to accomplish more together tldr: love is all you need