> Even OpenAI and Anthropic aren't bad enough that they claim literal ownership of your inputs and outputs.

In this case you are placing your trust in OpenAI and Anthropic. I'm not sure about Anthropic but OpenAI has changed their mission corpus quite a lot from its humble beginnings that it results hard to trust them when they say they don't use your stuff to further train their models. If I'm a Big Corp with enough lawyers to putnup a fight, I would then feel ok with such clause, but being a small guy, who is going to defend me when the truth comes out that they have been training their models with my data? Similar fiasco as with Facebook, who had claimed they didn't sell your data, even though they were.

That's where I'm coming from with all this "trust us, we don't train our models with your data". At least this Chinese company is being upfront about it.