Difference between chatgpt 3 and 4

- Difference between chat gpt 3 and 4 reddit
- Difference between chat gpt 3 3.5 and 4
- Difference chatgpt 3 and 4
- Difference between chatgpt 3 5 and 4
- Difference between chat gpt 3 and chatgpt 4
- Difference between chat gpt 3 vs 4
- Is there a big difference between chatgpt 3 and 4
- Chatgpt vs chatgpt 4
- Chatgpt 4 difference
- Is chatgpt 4 free