Not sure. They flagged it. I appealed and told them what I was doing and the flag got lifted with a sorry our bad.

> You must not attempt to extract protected reasoning through unauthorized access, reverse engineering, or circumvention of safeguards.

This is the only mention of reverse engineering on their ToS. It only applies to trying to reverse engineering their models not others.

Moreover, their ToS is all about protecting security and privacy, which is what I was using it for.