Option to Choose GPT model for Rest of Chat Session

As the title says, we get an option to choose which GPT model (4 or 3.5) we want to use for the rest of a chat session either in the settings or a prompt after starting a new chat session.

Instead of defaulting to GPT-4 and the chat later switching to GPT 3.5 after we exhaust our GPT-4 time.

It makes the chat more coherent and less messy when we have the option to stick to one model for the rest of the chat.

(Free GPT-4 users can continue their chat session after each cool down period from where they left off).