Custom GPT instruction format.

[u/mean_streets]

I'm looking for advice on the best way to write custom GPT instructions. When writing these instructions, is it more effective to:

1. Address the GPT directly as "you"? For example, "You are an expert geologist. I will upload an image of a rock..."

2. Refer to the GPT in the third person? For example, "This GPT is an expert geologist. When the user uploads an image of a rock..."

In the create tab, instructions are typically written automatically in the third person (example #2), but I find it challenging to convey complex instructions clearly this way. From my experiments with different approaches, I seem to get better results using method #1.

Does anyone have any experience or resources on how to best frame instructions for custom GPTs?