Practitioner breaks down zero-data-retention terms: Anthropic defaults to 30 days, OpenAI needs account-team negotiation

HanchungLee · x · 2026-11-12

In a thread on vendor "zero data retention / no training" promises, a practitioner shares practical details: with OpenAI you negotiate via your account team, while Anthropic's Fable models default to 30-day retention.

He adds that beyond data retention, every hyperscaler buries fine print on CSAM and other content categories in their terms. Quoted commentator Zack Kanter argues such guarantees are only as good as the trustworthiness and controls of the vendor and its underlying processors — and virtually no one outside AWS and a couple of others actually meets that bar.

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