We tested GPT-5 on real-world app building this week. The coding output is 10x better, and the vibe coding stuff is impressive as well. But once you try to iterate or fix/edit a few things, it starts to get messy: layout breaks, logic gets overwritten, and small edits often require you to re-explain everything.
If you ve tried tools like Lovable, Cursor, Shipper, Replit, or V0, you ll notice the difference... those are built "to build". GPT-5 still feels more like a really good assistant than a reliable builder.
