Fraser Cook

@Vince80085 @xai We were so lucky to find you so early on, everything you worked on was the highest quality. I’d want you on my team every time 🙂

@fraser_cook @xai You've been one of the people I've learned the most from, and I could never quite grasp how you managed to be so good at so many different things at once. I'm genuinely grateful to have worked with you.

Today marks the end of my time at @xai I was incredibly fortunate to have joined at a time where I was able to help take us from nothing to something across a few surfaces. It has been a privilege to work alongside some of the world’s best for almost two years and share in the ups, downs and everything in-between. I wish all of them well, past and present, and want to thank them for what has been a very special period of my life!

@f_meringdal @xai The amount of rabbits you’ve pulled out of hats… was great working together 🙂

@fraser_cook @xai Exceptional frontend engineer and human. We will miss you!

@TobyPhln @xai Thank you for making it possible for me 🫡

@fraser_cook @xai Thanks for all the amazing work 🐐

@rabahtahraoui @xai It’s easier leaving knowing the team is good hands. You’ve been exceptional every day since you joined. I’ll be keeping an eager eye 🙂

@fraser_cook @xai Thank you for everything Fraser. You are genuinely a great human being and a brilliant engineer. You will be missed 🥲

@veggie_eric @xai 🥹 Your evolution at the company has been awe inspriring. I’ll miss working with you day to day (but hopefully not forever)

@fraser_cook @xai You're a one-in-a-million design + engineering powerhouse. We'll miss you so much!

@parker__conrad @xai I enjoyed working together recently, sorry to cut it a little short. All the best dude 🙂

@fraser_cook @xai Fraser!!! Thank you for all the help, it was a frickin pleasure. You’ll be missed sir!

@iamnalimov @xai Thank you and I hope so too, you are great 🙂

@fraser_cook @xai It’s been such a pleasure working with you! Hope to get a chance to work together again. All the best on what’s next 🐐

@DenisLabelle @xai Thank you!

@belce_dogru @xai Proud to have worked closely together in the early days to get things off the ground 🙂

@fraser_cook @xai Enjoy a well-deserved break! It's been a real joy working together!

@ebbyamir @xai Thank you, hope you’re doing well ❤️

@fraser_cook @xai All the best Fraser!

@aheze0 @xai Thanks 🐐! Will miss being on the same team as someone as good as you.

@fraser_cook @xai Enjoy your time off! 🫡

@jpedroribeiro @xai Thanks Pedro, same here. You made life a lot easier being so dependable 🙂

@fraser_cook @xai All the best on your next adventure and hope you enjoy your break. It has been a pleasure working with you!

@el1flem @xai Thanks man, loved working together ❤️

@fraser_cook @xai One of the best frontend engineers, designers and all around person in the game. Was a pleasure and honor to share trenches. Rest up boss and do enjoy those horse physics 👢

@Jaaneek @xai Thank you and back at you, looking forward to see what you cook up 🙂

@fraser_cook @xai Best and kindest FE/Design developer by far! It was truly an honor working with you!

@HeinrichKuttler @xai @elonmusk All the best to you and the growing family

Update on the below: 9 months later we're expecting our third child any day now. I decided to focus on my family for a while. Leading Supercomputing at @xai will remain the honor of my life. Thank you @elonmusk for the opportunity. We will win.

@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.

@JaimeAlns @xai It has been a pleasure working alongside someone of your calibre, both technically and as a person. Wishing you all the very best 🐐

It’s one of those: today was my last day at @xAI. xAI has been a tremendous formative experience for me, building the API, Grok.com, and everything in between, it’s been crazy and hectic, but overall amazing. I’m especially grateful to everyone I’ve worked with, @TobyPhln and the team in London, you’re the most talented team I’ve ever worked with. I’ll be cheering from the sidelines, really excited to see what the xAI team is going to come up with next!

@TobyPhln @xai @elonmusk 10x engineer, leader and human being. Thank you for bringing me on this journey with you, it has been truly life changing. Wishing you all the best in all that you do. 🫡

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?

@jimmybajimmyba @elonmusk All the best Jimmy, thank you for everything

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.