Codex

“So for example, Sonnet 3.7 clearly has it smells like cloud code, right? Same with codex. It very much impacted the way that those models want to write and edit code such that they seem to have a personality that wants to be in a CLI based tool.”

“And then you have your codex infrastructure that has a local agent and a remote agent, and that is able to seamlessly, you know, interplay between the two and then is able to multiplayer. Like, this is what the future is going to look like, and it's going to b…”

“A lot of these other tools that are great, like cloud code and codex and cursor and so on that they've forgotten what made them great and what made them grow so fast, which is building the very best product. And they built it in a way that's too overfit on the…”

“For the Visual Agents Builder, we only started that Probably less than two months ago, and that, that wouldn't be possible without Codex.”

“So we're actually shipping this Entirety, entire agent altogether, then you can actually build on top of that agent. That's one of the patterns that we're seeing here is rather than focusing on optimizing with every single model release, you're actually just b…”

“So now if it doesn't have a tool, it can make a tool that it needs to solve a problem, right? So that's like another layer of abstraction and it's not just coding. You can write software that has an agent that can spin up a codex instance and write a custom pl…”

“I haven't written a single line of code by hand in months, because I know what I can trust it to do.”

“Initially when Codex first launched, it was around 50% of folks that open AI started using it.”

“So Five One, you can turn that off, you can prompt it not to do that, but the Codex model can't actually do that, and it relies on the reasoning summarizer to give you that update.”

“So if you call it grep, it actually does a little bit Worse. But if you call it RG, it actually does really well.”

“We found some, like, partners of ours, like, they discovered that what you can do is that you can actually still have a lot of the tools just named in the same way as the terminal tools, as well as having the same input and output. And all of a sudden, the too…”

“Yes, that's open source, and the model is available in the API, so, so that's what they focus on.”

“Codex is, just to be clear, Codex is the frontier coding model that we have that is optimized for its harness.”

“With the five series, because it's more general, and it's just about as good as coding as codex for a lot of things. We've taught it to be more communicative. And so it has preambles before tool calls. It'll say things like, I'm about to go look for this.”

“If I spend, like, you know, 30, 40 minutes writing something that looks like a design doc or something, Codex can do more work than I can do in a few hours in, like, 15 minutes.”

“I'm pretty, like, have pretty high confidence that basically OpenAI will always release a GPT-V and a GPT-V codex.”

“Listen, Codex, in my experience, is for sure better than Opus 4.5 for coding. Like, it finds the hardest bugs that I work in with, like, it's, you know, the smartest developers I don't work on it.”

“I sandbagged the ever-living share of that. I just believe 25 is, Very, like, I, like, it's like a, the rate it's on is like, whatever, 50 or something like that, but I think, I feel, I wanted to give a 95 confidence interval. I think 25 is within the 95 confi…”

“So far we've been in, in easy mode. We've hit the easy button with AI, which is the agent just is you. And when you're in cloud code and you're in cursor and you're in codex, you're just, the agent is you, you're offing into your services. It can do everything…”

“I do think that there is leverage to be had in making the code and the processes as much the same as possible. If you think that code is context, code is prompts, it's better from the agent behavior perspective to be able to look in a package in directory XYZ …”

“One thing that's in core beliefs.md is like, Who's on the team, what product we're building, who our end customers are, who our pilot customers are, what the full vision of what we want to achieve over the next 12 months is. Like these are all bits of context …”

“If we were building an entire separate Ross scaffold around Codex to restrict its output, that I think would be like additional harness that would be prone to being scrapped. But yeah, if instead we can build all the guardrails in a way that's just native to t…”

“Initially the codex driving the code author was willing to be bullied by the PR reviewer, which meant you could kind of end up in a situation where things were not converging.”

“The models are there enough. The harnesses are there enough where they're isomorphic to me and capability and the ability to do the job.”

“Like the dashboard thing you mentioned, we have Codex authoring the JSON for the Grafana dashboards and publishing them, and also responding to the pages, which means when it gets the page, it knows exactly which dashboards are defined and what alerts. What al…”

“Like we have taken all the scaffolding that has existed in our proprietary repo, spun up a new one. Ask codex with our repo as a reference. Write the spec. We tell it, spin up a tmux, spawn a disconnected codex to implement the spec. Wait for it to be done. Sp…”

“We invoke a dollar land skill and that coaches codecs to push the PR, wait for human and agent reviewers, wait for CI to be green, fix the flakes if there are any Merge upstream if the PR comes into conflict, wait for everything to pass, put it in the merge qu…”

“We're actually slurping these up for the entire team into blob storage and running agent loops over them every day to figure out where as a team can we do better? And how do we reflect that back into the repository? Yeah, though, everybody benefits from everyb…”

“It basically means that Codex is able to spawn commands in the background and then go continue to work while it waits for them to finish. So it can spawn an expensive build and then continue reviewing the code, for example.”

“Optimizing for human legibility of that debugging process was wrong. It kept him in the loop unnecessarily, when instead he could have just like codex cooked for five minutes and gotten the same.”

“When we get a page because we're missing a timeout, for example, I can just add codecs in Slack on that page and say, I'm going to fix this by adding a timeout. Please update our reliability documentation to require that all network calls have timeouts. So I h…”

“When we deploy Codex security on the repo, it is able to deeply review and change The internalized dependencies in a much lower friction way than it would be to like push patches upstream, wait for them to be released, pull them down, make sure that's compatib…”

“No humans in the loop here. So like my, Own personal ability to write or not write Elixir doesn't really have to bias us away from using the right tool for the job, which is just wild.”

“One neat thing here is we have tried to invert things as much as possible, which is instead of setting up an environment to spawn the coding agent into, instead we spawn the coding agent, like that's the entry point, just codex, and then we give codex via skil…”

“If you can figure out how to collapse a product that you're trying to build a user journey that you're trying to solve into code, it's pretty natural to use the codex harness to solve that problem for you.”

“Codex just wrote up a simulation of the SYK model. This is like a very technical thing in quantum mechanics and gravity. And like, yeah, a lot of research groups have been trying to run this simulation and it couldn't do it. And Codex did it in 10 minutes.”

“And especially when there's the possibility of correlated failures, right? So it's not just that there's a lot of AI systems out there, it's that there's actually a few models that everyone is using. And if you find vulnerabilities in the agents that everyone …”

“We have a really great dev info team. They built something called Isaac that's basically like a wrapper on cloud code and codex and let's you use them either on the web and like, Sandboxes or just on your dev machine or on your laptop or whatever.”

“The vision is like bring useful agents to everyone. We started with like developers Historically are like early adopters that are willing to put up with more friction, set things up, et cetera. Like that's where, you know, Codex started. I think the next oppor…”

“Like, I think we fully intend to like, you know, treat developer, like developers have been, you know, a core market for us for so long. And like, there's so much more that we can do to make Codex great specifically for software development, and we'll continue…”

“So the harness is the same. The harness is shared. On, In both of the products, we made improvements to the harness to make it good for knowledge work, especially as it relates to plugins or computer use or artifacts. You get that power regardless of what your…”

“Codex has been my CMO for the last like two months. Basically running our ads and giving me advice on AEO and SEO and what have you. And I find it much more preferable to talking to a real human consultant, which I've also done. And it's roughly the same resul…”