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but then how can the parent comment land? "you're just not prompting right"

I don't think it does. If I had to guess, the top comment was using an older version of AI or a local model which wouldn't be able to solve the JSON API task. A lot of AI skepticism comes from people who used it once a while back and decided not to keep up with the latest developments. If I only had experience with gpt-3.5 then I'd also assume what the original commenter said.

An experiment I'd love to do, but which isn't actually possible anymore, is run GPT 3.5 or the original 4 API release through a modern "agentic" harness for a task like this.

I think 3.5 would probably need more frequent intervention than a lot of harnesses give. But I bet 4 could do a simple JSON API one-shot with the right harness. Just back then I had to manually be the harness.

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