I'm surprised and a bit nervous about that. We intend to bootstrap a large project with it!!
Both ChatGPT 4o (fast) and ChatGPT o1 (a bit slower, deeper thinking) should easily be able to do this without fail.
Where did it go wrong? Could you please link to your chat?
About my project: I run the sovereign State of Utopia (will be at stateofutopia.com and stofut.com for short) which is a country based on the idea of state-owned, autonomous AI's that do all the work and give out free money, goods, and services to all citizens/beneficiaries. We've built a chess app (i.e. a free source of entertainment) as a proof of concept though the founder had to be in the loop to fix some bugs:
https://taonexus.com/chess.html
and a version that shows obvious blunders, by showing which squares are under attack:
https://taonexus.com/blunderfreechess.html
One of the largest and most complicated applications anyone can run is a web browser. We don't have a web browser built, but we do have a buggy minimal version of it that can load and minimally display some web pages, and post successsfully:
https://taonexus.com/publicfiles/feb2025/84toy-toy-browser-w...
It's about 1700 lines of code and at this point runs into the limitations of all the major engines. But it does run, can load some web pages and can post successfully.
I'm shocked and surprised ChatGPT failed to get a rename function to work, in 7 attempts.