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I was chatting with someone I know that has a paid subscription for ChatGPT 4. I was venting about the hallucinations I was getting for a certain problem; they mentioned how much better v4 is, and proceeded to plug my prompt into it. The answer it gave was actually a more blatant lie compared to the responses I got from v3.5.

Mm. One of the cases where cute corporate names for each version would actually help.

GPT: Alice; GPT-2: Bob; GPT-3: Carol; GPT-3.5: Mountain Carol; GPT-4: Dallas; …; GPT-19: Sydney

They did that for a while during the GPT-3 days, Ada, Babbage and Davinci all were/are different variations of GPT-3.

I've been seeing this "try ChatGPT 4" advice all over HN. I am using 4, and it still hallucinates and generates quite useless code. It's only marginally better in my experience.