What's the difference between OPRO and ProTeGi?

[chansonzhang]

What's the difference between OPRO (paper, code) and ProTeGi(paper, code)?

[chansonzhang]

I found statements from the paper that shed some light on this problem

Different from recent work on using LLMs for automatic prompt generation (Zhou et al., 2022b; Pryzant et al., 2023), each optimization step in our work generates new prompts that aim to increase the test accuracy based on a trajectory of previously generated prompts, instead of editing one input prompt according to natural language feedback (Pryzant et al., 2023) or requiring the new prompt to follow the same semantic meaning (Zhou et al., 2022b).