InstructGPT vs GPT 3.5 Turbo


I would like to start a discussion around what use cases you would use InstructGPT model instead of GPT 3.5 Turbo and why those uses cases are more suited for InstructGPT. I’ve looked over a bunch of documentation about InstructGPT, but I’m still not understanding when to use it.


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The instruct model is much more terse and concise, it just does what it is instructed to do.

gpt-3.5-turbo is chatty, it will talk to you beyond what is asked.

So, if you want a model to do something the instruct model will typically work better and use fewer tokens doing so.

If you want a model to interact with users in a natural, conversational manner the chat model will be much better.