You don’t have to, but it’s what OpenAI recommends—it’s much cheaper (if you’re using gpt-3.5-turbo) and performs just as well under most circumstances. See this section of the docs:
You don’t have to, but it’s what OpenAI recommends—it’s much cheaper (if you’re using gpt-3.5-turbo) and performs just as well under most circumstances. See this section of the docs: