Lenny Rachitsky explains why Codex would have failed if launched in November 2025: the language model wasn't powerful enough yet. The app let users give a task and get a result back, but that simple form factor was premature for what the model could actually do.
The Codex app that we released in February, if that had been ready in November, it would have absolutely failed in the market. The only difference was the models between November and February, right?
Definitely a thread on this podcast is build things that are not yet working that will work when the model gets better.
I push people not to be stubborn about like, no, this isn't working, so it's a bad feature. It's like, no, it might not be ready yet. There's always a desire to be the most ambitious and to say, okay, but at the limit, the model can just do this, right? And it just doesn't work. On the product side. If you go back to the original Codex release, it was like, you give the model a task and it's going to go off, do a task, come back to you with it finished. It doesn't sound that radical. The problem is like, it was good, but it was like that form factor was too early.