Riley Brown: GPT 5.4 one-shotted a Replit clone in 80 minutes
Riley Brown · Stop using Claude. Start using Codex? · Apr 27, 2026 · at 12:31
Riley Brown describes benchmarking Codex and OpenAI models on complex coding tasks to host Greg Isenberg.
0:00 / 0:14exact quote · 14.7s
▶ Watch the full episode on YouTube → 720p mp4 · rendered on demand · StarZero watermark
“I've one-shotted, the other day I one-shotted an app like Replit, a vibe coding tool, that spun up sandboxes, and you could vibe code web apps on your phone in one shot. It took an hour and 20 minutes to generate the code, and this was on 5.4.”
quote is from the automated transcript, cleaned for reading: filler sounds and stutters are removed, nothing is rephrased. names can be misheard (the analysis reads context, assessments check outside sources). how →
More from Riley Brown
Brown: Codex beats Claude Desktop by unifying coding and coworking tools
“Another way that I like to think about this is Claude code or this codex is like Claude code and co-work in a single product, but it's even better than that. And the reason why I like it more than Claude desktop is Claude made a decision to split up co-work an…”
Brown: 95% of software development is now as easy as making presentations
“I think vibe coding has gotten so easy that like, 95% of the things that you would want to code, it's as easy as creating a presentation.”
Riley Brown: OpenAI consolidated efforts to integrate Atlas browser inside Codex
“Well, recently they had like this big red alert at their company, and they decided to kind of push all of their efforts into one single app, which was Codex. And now what they're doing is they're just putting Atlas inside. They're basically putting Atlas insid…”
Brown: GPT Image 2 is undeniably the best image model in the world
“Codex has GBT image two, which is the best image model in the world. And again, this is not like up for debate. I'm not, again, I'm really not trying to show anything.”