> GPT can never be an intelligent agent because it’s not an agent.

It's already almost there.

GPT-3 has the ability to generate short or long. If you ask it "let's think step by step" it generates a chain of thought, dividing the task into steps and doing them one by one, almost like an agent.

On the other hand, if you strap GPT-3 on an agent in a 3D Home Environment it gains the ability to perform multi-step tasks zero shot. So it's quite ready for it.

If you train a reward model based on supervised data, you can finetune GPT-3 with it. This is how Instruct GPT-3 was created, through text-based RL.

I'd say GPT-3 is very close to being an agent, it just needs to be put in a body in an environment and trained a bit longer.