To be fair though, you typically end up doing that process even when you remain within the OpenAI ecosystem, because they're putting out new (cheaper) models.

To be fair though, you typically end up doing that process even when you remain within the OpenAI ecosystem, because they're putting out new (cheaper) models. For example, a couple weeks ago I migrated a few game mechanics from GPT-4-Turbo to GPT-4o and it caused significant enough issues that I needed to revert them all until I could go back and retune all the prompts, which ended up taking 2-3 days. That's probably about as much time as it would have taken to tune prompts for any other model, especially since I'm using an API that standardizes format/structure across whatever model I select (as simple as a dropdown) and lets me just focus on prompt messages independent of which LLM they're going to.