I don't know for sure but I'd bet BIG money that these do not include automatic fine-tuning, though I still understand them to be a bit more powerful than just "custom prompts" -- think templates, or sets of custom prompts for specific (sub-)situations.

This is the kind of feature that will prove to be a minor improvement for anyone on this forum, and a complete paradigm shift for the less technically-inclined. IMO.

> Is this basically them deploying fine tuned models?

From the description of the past outside practice it is marketed as moving into OpenAI's offering, it sounds more like its custom prompts, not fine-tuned models.

I think OpenAI will take the most popular "GPTs" in their store and launch their own fine tunes.