Grok 3 vs chatgpt 4.5 July 8, 2019 16 32 64 128 Grok 3 chatgpt 4.5 Chatgpt 4.5 vs grok 3 vs claude 3.7 Difference between chatgpt 3 and 4 Chat gpt 3 vs gpt 4 Chatgpt vs chatgpt 4 Gpt 3 vs 4 Difference between chatgpt and gpt 3