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How we built Grok Bot in a month | Roman Ugarte (SpaceXAI) artwork

How we built Grok Bot in a month | Roman Ugarte (SpaceXAI)

Lenny's Podcast: Product | Career | Growth

September 8, 2026

Roman Ugarte helped incubate and build Grok Bot, the popular new knowledge-work agent from SpaceXAI. A small, isolated team took it from first line of code to a working internal product in four weeks, and to a hugely successful public launch just three weeks later.

Speakers Roman Ugarte, Lenny Rachitsky

TopicsTechnologyBusinessEntrepreneurship

Roman Ugarte (0:00)

The ultimate vision of Grok Bot is incredibly simple. You should have a team of AI bots that help you with your job and help you with your life.

Lenny Rachitsky (0:10)

Grok Bot is the hottest AI product in the world right now. That is a very high bar. There's a lot of competition for that slot.

Roman Ugarte (0:16)

We wanted to build something that wasn't just a great product for developers and engineers. We decided to create this very small team internally, to go off into a cave for about a month with the sole objective of build an amazing knowledge work product that brings agents to the rest of the company.

Lenny Rachitsky (0:33)

It's been only three weeks since launch. I went to a Grok Bot meetup. There were hundreds of people there, standing room only. It's very clear to me that you guys have built something very special.

Roman Ugarte (0:43)

Once you start breaking out of, this is AI chat with a set of connections, instead to, this is a colleague with a computer. It just raises the ceiling of what you would think to give to AI.

Lenny Rachitsky (0:54)

You have this tweet, an AI that does 100% of the job feels categorically different from one that gets you 90% there.

Roman Ugarte (1:00)

What made me so excited to work on Grok Bot is, it was the first time for non-coding tasks that I felt like I could truly delegate work to AI. I have to think about it, and I would come back and it's done.

Lenny Rachitsky (1:15)

What is it that you think you did that is so different, that made Grok Bot so successful?

Roman Ugarte (1:19)

It was two early decisions that at the time, definitely did not feel obvious, but in hindsight, I think, are critical to what makes Grok Bot work.

Lenny Rachitsky (1:30)

Today, my guest is Roman Ugarte. I'm going to keep this intro very short so we can get right into it. Roman was employee number 15 at Cursor. He's had a growth for the last two years. Most recently, he helped incubate Grok Bot, a product that I'm obsessed with. It has changed my life. I use it a hundred times a day for all kinds of things, and I think it's safe to say it is the hottest and exciting new AI product in the world right now. Roman leads product for Grok Bot. He's been part of the core team from early prototype until today, and we get into how it all started, where it's all going, and all the things that he and his team have learned since it launched just a few weeks ago.

With that, I bring you Roman Ugarte.

Roman, thank you so much for being here and welcome to the podcast.

Roman Ugarte (2:16)

Thank you. It is great to be here.

Lenny Rachitsky (2:18)

I'm so excited to have you here. I am so hooked on Grok Bot. I have it over here in my window. I have like 15 bots that I use every day all the time. I went to a meetup the other day, a Grok Bot meetup. There were hundreds of people there, standing room only, people sharing all the ways they're using Grok Bot. It's very clear to me that you guys have built something very special. It's very hard to break through the noise in the AI world. Grok Bot is the hottest AI product in the world right now. That is a very high bar. There's a lot of competition for that slot. I personally noticed I've moved a lot of my use cases from Co-Work and Codex into Grok Bot just very quickly, which again feels like a really big deal in a very special moment.

I'm excited to talk about so many things. I want to understand how you guys did this, where this came from, where this is going, what you've learned about the journey so far.

First of all, it's just a nice job, nice work. This is very hard, what you've done.

Roman Ugarte (3:21)

Thank you. I mean, I remember on-boarding you by hand about a month ago, and I think you were skeptical at first, but we're very glad that you've been using it, and it's been great to see so many people really take advantage of Grok Bot.

Lenny Rachitsky (3:36)

I'm going to talk about that on-boarding. That was a very interesting element of how this worked.

I actually remember in that on-boarding, I tried it, you asked me to do like a, let's try something, and I was like, okay, try to come up with a tweet to promote my latest podcast episode. So I'm just like, come up with a tweet to promote my last episode. That's it. It was actually very good. It figured out what the last episode was, how to promote. So I actually remember in the moment being like, wow, this is really good. So let's actually start with the origin story. Where did it start? What was the original idea, and when did the work on this begin?

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