How much in tokens/Claude subs would it cost to make a paint.net open source clone?
Seems like the kind of software that with enough tokens an agent would be able to create from scratch autonomously (because you have a clear goal and reference)
I'd guess with 5 max subs running fable 5.1 almost non stop it should be doable in a couple of weeks.
I think it's roughly possible for any piece of software. I think the problem would be how long it would take to polish it afterwards. I think it would be an interesting experiment to run an AI only open source project though. Not sure cloning another paint program is really worth the effort however.
The author says it's about 700k LoC that he's worked on for 20 years.[1] I don't know how many tokens that arrives at, but that seems non-trivial.
[1] https://simonwillison.net/2026/Sep/2/rick-brewster/