Here's more information on the fine-tuning process: https://beta.openai.com/docs/guides/fine-tuning
In terms of where it's incorporated in the code, the fine-tuned model id is stored in an environmental variable called `process.env.OPENAI_MODEL_ID` which then gets passed to the completion endpoint
I'm interested in the fine tuning (I wasn't aware OpenAI was allowing GPT3 weights out to be tuned?) and how that is being factored into the code.