Cursor and Anthropic hold more proprietary coding tokens than exist on the public internet, and training on that data plus three weeks on the Colossus 2 cluster produced a Pareto-dominant coding model, showing xAI/SpaceX AI can be a real player in coding.
Gavin explains that Cursor's proprietary coding data, fed into training plus three weeks on the Colossus 2 cluster, produced Composer 2.5, which briefly became Pareto-dominant on coding benchmarks. ✦ AI generated
Gavin Baker · BG2 Pod · 2026-06-11 · original ↗
starts at this moment · 5:30
“What are the key levers that we ought to be thinking about that you're thinking about over the course of the next few years?”
Cursor fed um used ChemK 0.25, used their own private data, did some RL, some supervised fine-tuning and they got a really good model. And then they spent 3 weeks in the Colossus 2 cluster and they got a model that 12 days ago was Pareto dominant with Composer 2.5.
verbatim transcript · starts at 5:30
5:30proprietary coding data than exist on the public internet. And so they fed Cursor fed um used ChemK 0.25, used their own private data, did some RL, some supervised fine-tuning and they got a really good model. And then they spent 3 weeks in the Colossus 2 cluster and they got a model that 12 days ago was Pareto dominant with Composer 2.5. That's on their own benchmark. Um Cursor bench, so maybe take it with a
5:58grain of salt. But I think this just suggests that the Cursor data is very valuable for coding and when it is trained, you know, to Chinchilla optimal or beyond Chinchilla optimal with reinforcement learning, you know, I think it suggests that XAI and SpaceX AI has a shot of being a real player in coding. >> I mean, I think one of the interesting things is, you know, we
6:21you know, the way he answered the question, right? We didn't talk about launch. Right? We didn't talk about Starlink or communications. Those up until really 6 months ago were the business. >> Yeah. >> Right? And, you know, and then we merged in x.ai and we merged in Cursor and then we announced these deals where it was very clear he was kind of building AWS right under our nose, you know, in in in
6:43in terms of this. But what I want to do is go to go to Fox. Give us the breakdown. Three big lines of business, right? We've got the the the communication Starlink launch business, we've got the, you know, AI compute business and then I want to come back to x.ai that you were just clicking on. But if we just go to the core business, what do we have to assume goes right in the
7:03core business both with launch and with Starlink in order to achieve the numbers that are out there? >> Yeah, sure. So, look, I think the thing that's foundational to everything is the launch business. >> Right. >> Right? This is the kind of crown jewel of SpaceX. Um it's something that no one else really has, notably reusability. >> Right. >> And soon rapid reusability. Right? This is, I think, what you need to believe in
7:27to get to the economics in AI that make orbital compute something that's very economically attractive. >> Right. >> Outside of the idea that we are in shortage for power, shortage for chips. Right? Um so, I think rapid reusability is the main thing that we're watching for and I think most people should watch for. Um, you know, Elon talks about it a lot, but getting these rockets to fly at a