Launching Copilot on my iPhone, I see an on/off switch "Use GPT-4", with it defaulted to off. Switching it on, Copilot says, "Nice! It will be fun with GPT-4 .

Launching Copilot on my iPhone, I see an on/off switch "Use GPT-4", with it defaulted to off. Switching it on, Copilot says, "Nice! It will be fun with GPT-4 . Responses may be slower while being creative. What do you want to explore today?"