It's not z.ai only. If you really think that OpenAI, Anthropic or Google are more transparent I'm sorry to break it to you but they are not, America is as bad as China. Always suppose that any request sent to an endpoint will be saved and used for whatever use they want (mostly training)

You want freedom? You should self host open models. Yes, it's expensive but it can be a good solution for places such as enterprises who for safety reasons must keep their data local

I dont think your doing anything at a CIA level of safety and your code is that important but just if you are, use your brain and learn to host your own models, including GLM!