alt Hacker NewsWouldn't the better comparison still be against an AI provider with better privacy controls, especially if that's what someone cares about (even if they don't care about whether they're comparing a 35 billion param model vs a x trillion param model)?
Users generally have no way to verify that a third-party provider, even if they advertise themselves as privacy-focused, will adhere to their own terms. This is similar to the issue of privacy-focused VPN providers that claim to not log user activity (and then end up leaking user activity). You can get proof of ~P, but rarely proof of P, and often times the proof of ~P is due to police raids, data breaches, etc., not something of the provider's volition.
What you can possibly audit is probably data sovereignty. For instance, I would not be surprised if Mistral's customers demand concrete evidence that their data is held within the European Union. But that is a distinct issue from training on input tokens.