Codex

“Copilot is essentially that magnified by many lines of code. It is multi-line autocomplete that is Fundamentally powered by an AI model called Codex, which is a derivative of another kind of one that you might be familiar with, GPT-III.”

“Like often collaborate with it first to write like a plan on MD, like a markdown file. That's your plan. And once you're happy with that, Then you ask it to go off and do work, and if that plan has verifiable steps, it'll, like, work for much longer.”

“The key unlock is actually first you need to land with users in a way that's, like, much more intuitive and, like, trivial to get value from. So the way that most people discover, like, the vast majority of users discover Codex today is either they download an…”

“The last stat we shared there was, like, we were, like, well over 10 X since August. In fact, it's been, like, 20 X since then. Also, the codex models are serving many, many trillions of tokens a week now, and it's basically, like, our most served coding model…”

“The real, like, I think bottleneck right now is like validating that the code worked and like writing code review.”

“Data scientists often here are using Codex a ton to just, like, answer questions, like, why do you think this metric moved? What happened? So questions, you know, you get the answer right back in Slack.”

“The first time we used the brand codex at OpenAI was actually the model powering GitHub Copilot.”

“Especially, I think for Twitter X it's a little bit more hypey, and then Reddit is a little more negative, but real, actually. So I've started increasingly paying attention to, like, how people are talking about using codecs on Reddit, actually.”

“We've reached the point where actually the codex model is the most served coding model in the API as well.”

“One of the things that I'm constantly reminding myself of is that a tool like Codex sort of naturally is a tool that you would, you know, become a power user of. And so we can accidentally spend a lot of our time thinking about features that are like very deep…”

“It turns out the best way for models to use computers is simply to write code.”

“One of our major goals with Codex is to like get to proactivity. I think this is like critically important to like achieve the mission of OpenAI, which is to deliver the benefits of AGI to all humanity.”

“The best way to try codex is to give it your hardest tasks. Which is a little different than some of the other coding agents. Like, you know, some tools you might think, okay, let me like start easy or just like, you know, like vibe code something random and d…”

“The Sora Android app, right, like a fully new app, We built it in 18 days. It went from like zero to launch to employees, and then 10 days later, so 28 days total, we went to just like GA, to the public. And that was done just like with the help of Codex.”

“Codex writes a lot of the code that helps, like, manage its training runs, the key infrastructure. You know, we move pretty fast, and so we have a Codex code review is, like, catching a lot of mistakes. It's actually caught some, like, pretty interesting confi…”

“Codex really empowers, like, top performers to get a lot, like, to be a lot more productive, and so it really, like, and I think this may be true for AI more broadly, like, across society, which is, like, the people who really lean in, or, like, the people who…”

“So, 95% of engineers use Codex. 100% of our PRs are reviewed by Codex daily as well, so basically any code that goes into production that's merged in, Codex kind of has its eyes on and suggests improvements, suggests changes in the PRs.”

“And so I know for myself and some of the other EMs, Engineering managers at OpenAI. all of our code is written by Codex at this point.”

“Almost every engineer heavily uses Codex in all of their tasks at this point, and so I, you know, if I were to guesstimate, like, the vast majority of code at this point is, It was probably authored by AI.”

“So there's a team that that's actually doing an experiment right now with an open AI where they are basically maintaining a 100% code expert and code base. So, you know, like, you know some, you know, you'll have the AI write code, but you'll obviously end up …”

“My sense is I think managers will be able to manage much larger teams in this world. Kind of like how, you know, like software engineers are managing 20 to 30 codexes. My sense of these tools will allow managers, people manage to be higher leverage and will al…”

“And it makes, you know, code reviews go from a, you know, I don't know, 10:15 minute task to sometimes even just like a two to three minute task, because you have a bunch of suggestions already, already baked in.”

“A lot of the time when the coding agent is not doing what you want, it's usually a problem with context and just, like, information that you've given it. It's just either underspecified or there's just not enough information around how to do something availabl…”

“I know many of the engineers on my team basically have like, 10 to 20 threads kind of being pulled on at the same time. Obviously not active running codex jobs. But just a lot of parallel threads. They're checking in on what they're doing. They're steering the…”

“So they're actually opening 70% more PRs and than the engineers who aren't using Codex as much and the gap is widening.”

“Why do code review tools, automatic code review tools not work that well? I think there's actually a subtle thing, which is you push your code publicly to, or publicly within the organization or your team. And then a thing roasts your code and tells you How te…”

“OpenAI for a while was, I, in my opinion, like, very, very behind on this, and then in my opinion has surpassed them recently.”

“Whoever's in the lead, it feels very obvious to me that all of the work that you do is going to be in one of those surfaces”

“Codex is not a video editor per se, right? It doesn't have any of that UI in it. But it was able to understand that he used Premiere Pro. It could do some edits by editing the files that were backing what was on screen in Premiere Pro, but it couldn't do every…”

“We have people from marketing, from comms, from finance, from legal, from basically every discipline who are using this codex app, even though it is actively hostile to these people, right?”

“We're trying to do two things at once with Codex and with now with ChatGPT. One is how can we seamlessly interact with these tools that you're already using and say, like, we don't need to build a better video editor for you. Right. But like Codex and ChatGPT …”

“Like we have baby codex, right? A dramatically simplified code base that approximates all of the interactions of the production app. And therefore is a lot quicker to vibe code over, right?”

“There's been a lot written about role collapse, existential role collapse. There are no roles anymore. We haven't seen that. We've, we have seen more role collapse in the Codex org than I think other parts of the company and other parts of the economy.”

“There is a desire among all of us to try to do as much as possible in the app, even when it's not the best tool so that it can become the best tool. And so a lot of design we all work on by using the app and say, okay, what's broken about this? This is a whole…”

“In work mode, that's where under the covers, this is codex. We've removed some of like the coding UI, like you don't, you're not going to see a work tree pop up all of a sudden in, in work mode, but it is the same power to get things done”

“And actually with the Codex app the team who initially got it up and running and we're working on it we're super, again, user focused, tight iteration loop, really dog food at the thing, like mainline to the app as much as possible to get get everything right …”