Comment by sheepscreek
2 days ago
> For my math/research heavy applications it is up there with GPT-5.2 thinking and Gemini 3 Pro. And it’s well ahead of K2 thinking and Opus 4.5.
I wouldn’t use the z-ai subscription for anything work related/serious if I were you. From what I understand, they can train on prompts + output from paying subscribers and I have yet to find an opt-out. Third party hosting providers like synthetic.new are a better bet IMO.
From their privacy policy:
"If you are enterprises or developers using the API Services (“API Services”) available on Z.ai, please refer to the Data Processing Addendum for API Services."
...
In the addendum:
"b) The Company do not store any of the content the Customer or its End Users provide or generate while using our Services. This includes any texts, or other data you input. This information is processed in real-time to provide the Customer and End Users with the API Service and is not saved on our servers.
c) For Customer Data other than those provided under Section 4(b), Company will temporarily store such data for the purposes of providing the API Services or in compliance with applicable laws. The Company will delete such data after the termination of the Terms unless otherwise required by applicable laws."
I stand corrected - it seems they have recently clarified their position on this page towards the very end: https://docs.z.ai/devpack/overview
> Data Privacy
> All Z.ai services are based in Singapore.
> We do not store any of the content you provide or generate while using our Services. This includes any text prompts, images, or other data you input.