I think that shared chats all use the green icon. If you check the source code, it says "model_slug":"gpt-4." It will also state that "the previous model used i

I think that shared chats all use the green icon. If you check the source code, it says "model_slug":"gpt-4." It will also state that "the previous model used in this conversation is unavailable" if you try to continue the conversation on a free account.