Open-weight AI models need economic incentives and funding mechanisms to be sustainable, because unlike classic open-source software you cannot train a frontier model through donated volunteer time — it requires millions or billions of dollars of compute.
Matt argues the economics of open-weight models differ fundamentally from open-source software: you cannot volunteer to train a frontier model for fun since it needs billions in compute. He adds this is even more pressing for Chinese labs, where without commercial funding the alternative source is government money. ✦ AI generated
Matt Bournestein · a16z Podcast · 2026-08-06 · original ↗
starts at this moment · 21:44
I I I don't think it's greed at least what I've seen from open source model labs... Open source models really what we're talking about are open weights... And it's just not software, right? Like an AI model is not software at the end of the day. Um, and so open- source software used to be supported by people donating their time or big companies kind of authorizing their employees to donate their time... That really doesn't work in AI... Like I can't just like go home at night and like train a frontier opensource model with friends for fun. Like we need millions or billions of dollars of computing resources in order to do it...
verbatim transcript · starts at 21:44
21:44what I've seen from open source model labs, right? >> Open source models really what we're talking about are open weights. Yeah. >> Right. And and it's just not software, right? Like an AI model is not software at the end of the day. Um, and so open- source software used to be supported by people donating their time or big companies kind of authorizing their employees to donate their time. So, it
22:09was sort of like a bulk inind, you know, donation of people's time. >> That really doesn't work in AI, >> right? Like like I can't just like go home at night and like train a frontier opensource model with friends for fun. Like we need millions or billions of dollars of computing resources in order to do it. So, so I think it does support your point that like like obviously
22:30there need to be economic incentives and there need to be funding mechanisms in place. >> Frankly, I think even more so with with Chinese models than than with domestically produced models, right? If if if there's no source of economic if there's no source of funding >> for for moonshot to continue to train models, like we know where the funding will come from instead and it's not like
22:51something we right, you know, it's it's government and and things that like are actually worse for us, I think. So like I I I think I think you raised sort of an interesting point that that this is an important economic structure and like I I I think this means we'll see more of this in the future. Would you agree with that? Yeah, it's really about sustainability in the end. is about how