Xudong Lin

Proud of our team that makes the huge leap happen compared to last version but this is just the start. Better models are lined up and we keep improving every week. Join us towards Superhuman Multimodal Intelligence job-boards.greenhouse.io/xai/jobs/50826… !!

Starship static fire successful!

Imagine!

@xdNiBoR The future of AI is primarily video understanding and generation, because photons are by far the highest bandwidth form of communication. These are essential tools for AGI. Worth mentioning that Imagine is positive gross margin for @xAI, not a money loser.

Congrats!! Try Imagine!!

In order to understand the universe, you must explore the universe → x.ai/careers

@Helicoptarion Really appreciate the critical feedback! We will fix it

@Xudong_Lin_AI still fails the 6-fingers test; Gemini solves it easily grok.com/share/bGVnYWN5…

Proud of our team that makes the huge leap happen compared to last version but this is just the start. Better models are lined up and we keep improving every week. Join us towards Superhuman Multimodal Intelligence job-boards.greenhouse.io/xai/jobs/50826… !!

@gg1012794 Thanks for the critical feedback! We will make Grok better on these use cases

@KeranRong One of the sprints

BREAKING: Grok Imagine by @xai takes 1st overall on Video Editing Arena, with an overall Elo of 1290. The team's debut video editing model establishes a new Pareto frontier for Preference vs. Speed with an average generation time of 1 min 5 sec. Congrats to the @xai team for this achievement!

@imhaotian @elonmusk I really appreciate the short journey together! Enjoy Hawaii and wish you all the best!

I left xAI earlier this week. It was a difficult decision. The past two years have been an intense, fun, and deeply rewarding journey, and I accomplished things I could not have imagined two years ago. Thank you @elonmusk for the opportunity and for everything I learned at xAI. Thank you @Guodzh for the trust you placed in me and for all the days and late nights we worked through together. And thank you to the entire Omni / Imagine team: thank you for your trust, and for growing together with me. It has been an honor, and I am incredibly proud of what we achieved together. I feel fortunate to have had the chance to work with all of you. At xAI, everything feels possible. I had the chance to work with and learn from some of the most exceptional people I have ever met. I was able to explore across domains: from pretraining to post-training, from language models to multimodal, from perception to generation. Joining xAI was one of the best decisions I have ever made. @grok imagine is special to me. Building video generation models, where I started with almost zero prior knowledge, from 0 to No.1, as an IC and as a lead, alongside an extraordinary team, and shipping it as a great product used by millions, all within 6 months, at age 28: I feel proud. But now it’s time for me to move on. I’m burnt out, and I know my happiness is no longer maximized in my current state. It is sad to say goodbye, but it is just the right time for a change. Best wishes to the Imagine team, you are absolutely the best, and you deserve the best. I will cherish all our memories for the rest of my life. For now, I’m taking a break and giving myself time to figure out what comes next. Posted from Hawaii.

@Guodzh Cannot thank you more Guodong, for everything! It was both pleasure and honor to work with you! Wish you all the best!

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!

The Grok 4.20 Beta shows three major improvements over Grok 4: ➤ Our lowest ever hallucination rate on the AA-Omniscience evaluation. When Grok did not know the answer, it hallucinated an incorrect answer 22% of the time - this is the lowest hallucination rate of any model we have tested, topping Claude Haiku 4.5 (25%) ➤ Top scores for instruction following and prompt adherence. On IFBench, Grok 4.20 takes the #1 spot with 82.9% - a +29.2 point increase on Grok 4 ➤ Leading speed for its intelligence. At 265 tokens per second output speed on xAI’s API, Grok 4.20 is significantly faster than its peer and over 2x the output speed seen from Grok 4.1 Fast Congratulations to @xai and @elonmusk on the 4.20 Beta 0309 launch!

Join Tesla for real-world AGI or xAI for digital-world AGI

BREAKING: 🚀 Grok Imagine is #1 Grok Imagine now ranks #1 in the Image-to-Video Arena, beating major AI models and leading the next wave of AI video generation. xAI continues to push the boundaries of creative AI.

Free grok imagine image & video gen for a day, take the chance!

Grok 4.20 beta1 (single agent) debuts #1 on Search Arena, and #4 overall in Text Arena! Highlights: - #1 in Search, scoring 1226, leading GPT-5.2 and Gemini-3 - #4 in Text, scoring 1492 on par with Gemini 3.1 Pro Congrats to the @xAI team and @elonmusk on this impressive milestone!

Grok 4.20 beta1 (single agent) just took the #4 spot on Text Arena, scoring 1492 - Outperforming GPT-5.2 and closing the gap to Gemini 3.1 Pro This is just the single-agent version. The full 4-agent system available on Grok is significantly more powerful

Try the new Grok 4.20 public test release via Grok.com or the app

@r_ahulravi @xai @Guodzh @archanfel_anoth Best luck in your next journey!

Today was my last day at @xAI. This was one of the hardest decisions I have ever made and i could not be more thankful to @Guodzh and @archanfel_anoth for bringing me in during the chaos of grok 3.5 sprint and the kickoff for v7. There are far too many people to mention but to all the collaborators, friends, and people I now call family I met along the way, I am grateful our paths have crossed and am excited to see the things you all accomplish. I look forward to a brief hiatus before beginning the next journey, ad astra!!