Read the terms of the ZDR policy with a critical eye. You’ll find that Anthropic retains almost arbitrary rights to retain anything it wants.

https://code.claude.com/docs/en/zero-data-retention

AFAIK there’s no ZDR with Claude models accessed directly via Anthropic. You’d have to go through either Google Vertex, Azure or AWS for true ZDR (at least legally/on paper).

https://trustedrouter.com/models/moonshotai/kimi-k3 is a good option if you want that to actually be the case.