Rand Xie

Work on multimodal-LLM in xAI: Model, System, Product. Ex-Robinhood AI Lead, Ex-Googler

[Rand Xie @Randxie29]

Catch-up growth is easier: a small team can adapt and scale technologies invented elsewhere. Frontier innovation is different - it requires an org structure that fosters experimentation, independent thinking, and risk-taking. Eventually, the org structure becomes the bottleneck.

[Rand Xie @Randxie29]

Thanks to Jack for the shoutout!

Large projects have the same credit assignment problem as long-horizon agents: delayed rewards and long causal chains make attribution hard.

Maybe we need an ensemble of value models. 😄

[Jack Cai @JackCaiXun]

Unforgettable time! Grok Imagine was a true collective effort. In addition, @JiachenLi11 @chaoqi_w @jefffhj @Randxie29 — and many others made significant contributions in the initial 3 months sprint

[Xuhui Jia @jia_xuhui]

Grok Imagine is getting better and better. Our only goal is to make it genuinely useful. If we do that well, strong rankings will naturally follow as a byproduct.

[Guodong Zhang @Guodzh]

@EthanHe_42 worked with me and @imhaotian for half a year on Grok Imagine. I don't think he was being intentional overclaiming here, but the internet narrative quoting him as the "lead" was werid. It was really driven by @imhaotian most of the time.

Good times — especially that intense three-month sprint at the start. Huge credit goes to @imhaotian and several other key people like @zeliu_ @jathushan @ZhibeiM @hexiang @JackCaiXun @chaitu, and later @jia_xuhui @YknZhu, along with many others — especially the latest Grok Imagine 1.5.

[Rand Xie @Randxie29]

A question I keep asking myself:

Do you want to ride the waves and capture the upside everyone already sees?

Or stand with a small group of people doing deeply contrarian things before the world understands why they matter?

[Rand Xie @Randxie29]

@HeinrichKuttler @xai @elonmusk Thanks so much for setting up all those GPUs, Heiner! And huge congratulations on the new family member!

[Guodong Zhang @Guodzh]

Surprised again and again how much a few engineers can do with a clear goal in 3-6 months.

[Elon Musk @elonmusk]

@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.

[Rand Xie @Randxie29]

Grok Imagine is often overlooked in conversations around video generation, but the market share speaks for itself. It’s been incredibly rewarding to take it from nothing to where it is today. There are many stories behind this journey that are hard to fully capture here, but every sleepless night, pressure, and uncertainty has been worth it.

[X Freeze @XFreeze]

The speed at which Grok has captured the AI video market over the last few months is wild

Grok is completely taking over…..users are already generating way more videos with Grok Imagine than on any other AI platform

The traffic shift is unreal. Grok’s dominance moved so fast it crushed demand entirely, shutting down models like Sora

Adoption rate is insane. xAI is moving at lightspeed

If you haven’t tried Grok Imagine yet, you’re missing the new standard 🔥

[Rand Xie @Randxie29]

@karpathy I think the problem isn't memory, it's passive memory. We need agentic memory that updates and prunes through interactions. Humans don't remember every detail about their friends - they forget about noises, and remember those important moments.

[Rand Xie @Randxie29]

@alilbitofmo @xai I didn’t get a chance to say goodbye in person. You’ll be missed. It's been a pleasure working with you on all the human data tasks!

[Yukun @YknZhu]

Give it a try, it is fun!

[Déborah @dvorahfr]

Example of using the Grok Imagine extension:
Here is a 26-second scene without cuts, without editing, perfect stylistic coherence, made in 5 minutes.

I requested two 10-second extensions and one 6-second extension.
There is no loss of quality throughout the sequence and perfect sound consistency.

[Elon Musk @elonmusk]

Extend your video to 30 seconds

[Elon Musk @elonmusk]

Grok Imagine

[Rand Xie @Randxie29]

Great article!

"The scarce thing flipped from execution to judgment: can you orchestrate systems, run parallel bets, and have the taste to know which results matter?"

[Amy Tam @amytam01]

https://t.co/b9f99xbcMx

[Rand Xie @Randxie29]

New tool will bring a new art form. This short film reminded me of my experience as mechanical engineer: everyone was trained with new CAD tool (no more manual drawing). Tools improve efficiency, not creativity. Those who can create generates much better 3D design.

[银河百科全书 @yhbkqs]

贾樟柯和豆包视频生成模型 Seedance 2.0合作，共同完成了这支有些特别的短片《贾科长Dance》。

屏幕里的两个“贾樟柯”，都是通过Seedance 2.0生成的。其中一个保留了明显的“AI感”，另一个，几乎就是现实生活中的贾樟柯。

人类已经无法阻止AI的进步。要思考的是，AI能给人类带来什么？

https://t.co/taJ1fXr4Xi

[Rand Xie @Randxie29]

Why can films tell stories? Camera movement, lighting, and acting all matter - but montage is the decisive element. Narrative lives between shots. Even the simplest story requires more than a single shot; without montage, cinema is nothing more than a surveillance camera left running.

[Rand Xie @Randxie29]

@hangg70 You will be missed! I still remember the time we walked together near the office, and discuss the meaning of writing. Best wishes to your next journey!