If you're manually interacting with the model, GPT 4 is almost always going to be better. Where 3.5 excels is with programmatic access. You can ask it for 2x a

If you're manually interacting with the model, GPT 4 is almost always going to be better. Where 3.5 excels is with programmatic access. You can ask it for 2x as much text between setup so the end result is well formed and still get a reply that's cheaper and faster than 4 (for example, ask 3.5 for a response, then ask it to format that response)