I have tried GPT-3.5 and 4. There is a marked difference. (I have used it do what I think of as simple but nontrivial programming tasks, asked it for recommen

I have tried GPT-3.5 and 4. There is a marked difference. (I have used it do what I think of as simple but nontrivial programming tasks, asked it for recommendations for various products, etc.) GPT-4 still fails for me regularly but not nearly as often as GPT-3.5. I find it useful enough in my daily life to pay $20/month for. So if you did want to try it, you might be surprised.