What is zero data retention?

Zero data retention (ZDR) is a promise of a provider to keep no prompts and no answers. The provider reads your chat to answer it, then keeps nothing, by contract.

On Thinkr, 118 models run with ZDR, among them Claude, GPT, and Gemini. Thinkr trains no model, and every request of ZDR and Open forbids data collection, so it never goes to a provider that may train on it.

For a chat that nobody else can read, Private mode runs open-weight models inside an enclave that your browser verifies.

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