What is zero data retention (ZDR)?

Zero data retention (ZDR) is the claim that an AI endpoint does not keep the prompt, the completion, or other residue of a request after the call finishes.

Z.AI international Model API (api.z.ai), not mainland BigModel zero data retention: terms and exceptions

Q: What is the ZDR score for Z.AI international Model API (api.z.ai), not mainland BigModel?

On zdr.dev the published score is ZDR 1.0 (s) · A. API DPA: inputs and outputs are processed in real time and not saved on servers. Additional Terms: End User Content is not used to develop or improve services unless the customer agrees. Consumer chat is a different posture. Abuse and legal uses remain. Mainland bigmodel.cn is not this row. Processing stated as Singapore.

ZDR 1.0 (s) · A

Short answer

API DPA: inputs and outputs are processed in real time and not saved on servers. Additional Terms: End User Content is not used to develop or improve services unless the customer agrees. Consumer chat is a different posture. Abuse and legal uses remain. Mainland bigmodel.cn is not this row. Processing stated as Singapore.

Scope and evidence

Provider	Z.AI
Service	international Model API (api.z.ai), not mainland BigModel
Lane	ZDR
Origin	CN China
License	open-weight
Hosting	Self-host
Score	ZDR 1.0 (s) · A Contractual ZDR. Paper ZDR: no content retention by agreement, with typed carve-outs in force
Evidence	Contractual agreement reviewed (A: contractual (DPA/agreement-backed))
Source-review date	2026-08-25

Other lanes for Z.AI

ZDR 1.0 (s) · Az.ai/api · internationalZDR

Structured breakdown

Default posture: API DPA: inputs and outputs are processed in real time and not saved on servers. Additional Terms: End User Content is not used to develop or improve services unless the customer agrees.
Exceptions and carve-outs: Consumer chat is a different posture. Abuse and legal uses remain. Mainland bigmodel.cn is not this row. Processing stated as Singapore.

Approval and setup path

Default for API Services under the Additional Terms / DPA.

Flags on this record

s: safety-flag retention beyond base window

Practical questions for your agreement

Does your signed agreement cover this exact service, model set, and feature path?
Which retention, logging, and human-review exceptions still apply after any ZDR election?
What configuration evidence (flags, project settings, store defaults) confirms the posture you expect?
Do your customer commitments match what the reviewed evidence supports?

Does your agreement cover this deployment?

We can review the relevant terms, feature choices, and customer commitments, then help your team identify what to clarify or negotiate.

Speak to a ZDR expert about Z.AI

Sources

Trust and security

Privacy docs.z.ai

Posture ledger

2026-08-24

seeded

ZDR 1.0 (s) · A

Seeded from published documentation.

Full key on the scale. Method notes on methodology. Notation is always ZDR 1.0 (s,f,r) · A.